diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3e9a33007261a..c4cd1aa60515b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -17361,12 +17361,14 @@ namespace ts {
             let hasSpreadAnyType = false;
             let typeToIntersect: Type | undefined;
             let explicitlySpecifyChildrenAttribute = false;
+            let propagatingFlags: TypeFlags = 0;
             const jsxChildrenPropertyName = getJsxElementChildrenPropertyName(getJsxNamespaceAt(openingLikeElement));
 
             for (const attributeDecl of attributes.properties) {
                 const member = attributeDecl.symbol;
                 if (isJsxAttribute(attributeDecl)) {
                     const exprType = checkJsxAttribute(attributeDecl, checkMode);
+                    propagatingFlags |= (exprType.flags & TypeFlags.PropagatingFlags);
 
                     const attributeSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient | member.flags, member.escapedName);
                     attributeSymbol.declarations = member.declarations;
@@ -17384,7 +17386,7 @@ namespace ts {
                 else {
                     Debug.assert(attributeDecl.kind === SyntaxKind.JsxSpreadAttribute);
                     if (attributesTable.size > 0) {
-                        spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, /*typeFlags*/ 0, ObjectFlags.JsxAttributes);
+                        spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, propagatingFlags, ObjectFlags.JsxAttributes);
                         attributesTable = createSymbolTable();
                     }
                     const exprType = checkExpressionCached(attributeDecl.expression, checkMode);
@@ -17392,7 +17394,7 @@ namespace ts {
                         hasSpreadAnyType = true;
                     }
                     if (isValidSpreadType(exprType)) {
-                        spread = getSpreadType(spread, exprType, openingLikeElement.symbol, /*typeFlags*/ 0, ObjectFlags.JsxAttributes);
+                        spread = getSpreadType(spread, exprType, openingLikeElement.symbol, propagatingFlags, ObjectFlags.JsxAttributes);
                     }
                     else {
                         typeToIntersect = typeToIntersect ? getIntersectionType([typeToIntersect, exprType]) : exprType;
@@ -17402,7 +17404,7 @@ namespace ts {
 
             if (!hasSpreadAnyType) {
                 if (attributesTable.size > 0) {
-                    spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, /*typeFlags*/ 0, ObjectFlags.JsxAttributes);
+                    spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, propagatingFlags, ObjectFlags.JsxAttributes);
                 }
             }
 
@@ -17428,7 +17430,7 @@ namespace ts {
                     const childPropMap = createSymbolTable();
                     childPropMap.set(jsxChildrenPropertyName, childrenPropSymbol);
                     spread = getSpreadType(spread, createAnonymousType(attributes.symbol, childPropMap, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined),
-                        attributes.symbol, /*typeFlags*/ 0, ObjectFlags.JsxAttributes);
+                        attributes.symbol, propagatingFlags, ObjectFlags.JsxAttributes);
 
                 }
             }
@@ -17448,7 +17450,7 @@ namespace ts {
              */
             function createJsxAttributesType() {
                 const result = createAnonymousType(attributes.symbol, attributesTable, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
-                result.flags |= TypeFlags.ContainsObjectLiteral;
+                result.flags |= (propagatingFlags |= TypeFlags.ContainsObjectLiteral);
                 result.objectFlags |= ObjectFlags.ObjectLiteral | ObjectFlags.JsxAttributes;
                 return result;
             }
@@ -21957,7 +21959,7 @@ namespace ts {
         }
 
         function getContextNode(node: Expression): Node {
-            if (node.kind === SyntaxKind.JsxAttributes) {
+            if (node.kind === SyntaxKind.JsxAttributes && !isJsxSelfClosingElement(node.parent)) {
                 return node.parent.parent; // Needs to be the root JsxElement, so it encompasses the attributes _and_ the children (which are essentially part of the attributes)
             }
             return node;
diff --git a/tests/baselines/reference/checkJsxGenericTagHasCorrectInferences.errors.txt b/tests/baselines/reference/checkJsxGenericTagHasCorrectInferences.errors.txt
index 6b81ccd77e1b7..36ebc70b76ce3 100644
--- a/tests/baselines/reference/checkJsxGenericTagHasCorrectInferences.errors.txt
+++ b/tests/baselines/reference/checkJsxGenericTagHasCorrectInferences.errors.txt
@@ -1,5 +1,6 @@
-tests/cases/conformance/jsx/file.tsx(13,54): error TS2322: Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
-  Type 'string' is not assignable to type '{ x: string; }'.
+tests/cases/conformance/jsx/file.tsx(13,54): error TS2322: Type '(a: { x: string; }) => string' is not assignable to type '((a: { x: string; }) => string) & ((cur: { x: string; }) => { x: string; })'.
+  Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
+    Type 'string' is not assignable to type '{ x: string; }'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (1 errors) ====
@@ -17,6 +18,7 @@ tests/cases/conformance/jsx/file.tsx(13,54): error TS2322: Type '(a: { x: string
     let c = <GenericComponent initialValues={{ x: "y" }} nextValues={a => ({ x: a.x })} />; // No Error
     let d = <GenericComponent initialValues={{ x: "y" }} nextValues={a => a.x} />; // Error - `string` is not assignable to `{x: string}`
                                                          ~~~~~~~~~~
-!!! error TS2322: Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
-!!! error TS2322:   Type 'string' is not assignable to type '{ x: string; }'.
-!!! related TS6500 tests/cases/conformance/jsx/file.tsx:13:54: The expected type comes from property 'nextValues' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<GenericComponent<{ initialValues: { x: string; }; nextValues: {}; }, { x: string; }>> & { initialValues: { x: string; }; nextValues: {}; } & BaseProps<{ x: string; }> & { children?: ReactNode; }'
\ No newline at end of file
+!!! error TS2322: Type '(a: { x: string; }) => string' is not assignable to type '((a: { x: string; }) => string) & ((cur: { x: string; }) => { x: string; })'.
+!!! error TS2322:   Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
+!!! error TS2322:     Type 'string' is not assignable to type '{ x: string; }'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:13:54: The expected type comes from property 'nextValues' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<GenericComponent<{ initialValues: { x: string; }; nextValues: (a: { x: string; }) => string; }, { x: string; }>> & { initialValues: { x: string; }; nextValues: (a: { x: string; }) => string; } & BaseProps<{ x: string; }> & { children?: ReactNode; }'
\ No newline at end of file
diff --git a/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.js b/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.js
new file mode 100644
index 0000000000000..7d140a32b423c
--- /dev/null
+++ b/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.js
@@ -0,0 +1,25 @@
+//// [conditionalTypeContextualTypeSimplificationsSuceeds.ts]
+// repro from https://github.com/Microsoft/TypeScript/issues/26395
+interface Props {
+    when: (value: string) => boolean;
+}
+
+function bad<P extends Props>(
+    attrs: string extends keyof P ? { [K in keyof P]: P[K] } : { [K in keyof P]: P[K] }) { }
+function good1<P extends Props>(
+    attrs: string extends keyof P ? P : { [K in keyof P]: P[K] }) { }
+function good2<P extends Props>(
+    attrs: { [K in keyof P]: P[K] }) { }
+
+bad({ when: value => false });
+good1({ when: value => false });
+good2({ when: value => false });
+
+//// [conditionalTypeContextualTypeSimplificationsSuceeds.js]
+"use strict";
+function bad(attrs) { }
+function good1(attrs) { }
+function good2(attrs) { }
+bad({ when: function (value) { return false; } });
+good1({ when: function (value) { return false; } });
+good2({ when: function (value) { return false; } });
diff --git a/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.symbols b/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.symbols
new file mode 100644
index 0000000000000..e9620b38656eb
--- /dev/null
+++ b/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.symbols
@@ -0,0 +1,68 @@
+=== tests/cases/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.ts ===
+// repro from https://github.com/Microsoft/TypeScript/issues/26395
+interface Props {
+>Props : Symbol(Props, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 0, 0))
+
+    when: (value: string) => boolean;
+>when : Symbol(Props.when, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 1, 17))
+>value : Symbol(value, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 2, 11))
+}
+
+function bad<P extends Props>(
+>bad : Symbol(bad, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 3, 1))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 13))
+>Props : Symbol(Props, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 0, 0))
+
+    attrs: string extends keyof P ? { [K in keyof P]: P[K] } : { [K in keyof P]: P[K] }) { }
+>attrs : Symbol(attrs, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 30))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 13))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 6, 39))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 13))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 13))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 6, 39))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 6, 66))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 13))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 5, 13))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 6, 66))
+
+function good1<P extends Props>(
+>good1 : Symbol(good1, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 6, 92))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 7, 15))
+>Props : Symbol(Props, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 0, 0))
+
+    attrs: string extends keyof P ? P : { [K in keyof P]: P[K] }) { }
+>attrs : Symbol(attrs, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 7, 32))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 7, 15))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 7, 15))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 8, 43))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 7, 15))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 7, 15))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 8, 43))
+
+function good2<P extends Props>(
+>good2 : Symbol(good2, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 8, 69))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 9, 15))
+>Props : Symbol(Props, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 0, 0))
+
+    attrs: { [K in keyof P]: P[K] }) { }
+>attrs : Symbol(attrs, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 9, 32))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 10, 14))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 9, 15))
+>P : Symbol(P, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 9, 15))
+>K : Symbol(K, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 10, 14))
+
+bad({ when: value => false });
+>bad : Symbol(bad, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 3, 1))
+>when : Symbol(when, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 12, 5))
+>value : Symbol(value, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 12, 11))
+
+good1({ when: value => false });
+>good1 : Symbol(good1, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 6, 92))
+>when : Symbol(when, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 13, 7))
+>value : Symbol(value, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 13, 13))
+
+good2({ when: value => false });
+>good2 : Symbol(good2, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 8, 69))
+>when : Symbol(when, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 14, 7))
+>value : Symbol(value, Decl(conditionalTypeContextualTypeSimplificationsSuceeds.ts, 14, 13))
+
diff --git a/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.types b/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.types
new file mode 100644
index 0000000000000..cf55d7c3bcd3e
--- /dev/null
+++ b/tests/baselines/reference/conditionalTypeContextualTypeSimplificationsSuceeds.types
@@ -0,0 +1,53 @@
+=== tests/cases/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.ts ===
+// repro from https://github.com/Microsoft/TypeScript/issues/26395
+interface Props {
+    when: (value: string) => boolean;
+>when : (value: string) => boolean
+>value : string
+}
+
+function bad<P extends Props>(
+>bad : <P extends Props>(attrs: string extends keyof P ? { [K in keyof P]: P[K]; } : { [K in keyof P]: P[K]; }) => void
+
+    attrs: string extends keyof P ? { [K in keyof P]: P[K] } : { [K in keyof P]: P[K] }) { }
+>attrs : string extends keyof P ? { [K in keyof P]: P[K]; } : { [K in keyof P]: P[K]; }
+
+function good1<P extends Props>(
+>good1 : <P extends Props>(attrs: string extends keyof P ? P : { [K in keyof P]: P[K]; }) => void
+
+    attrs: string extends keyof P ? P : { [K in keyof P]: P[K] }) { }
+>attrs : string extends keyof P ? P : { [K in keyof P]: P[K]; }
+
+function good2<P extends Props>(
+>good2 : <P extends Props>(attrs: { [K in keyof P]: P[K]; }) => void
+
+    attrs: { [K in keyof P]: P[K] }) { }
+>attrs : { [K in keyof P]: P[K]; }
+
+bad({ when: value => false });
+>bad({ when: value => false }) : void
+>bad : <P extends Props>(attrs: string extends keyof P ? { [K in keyof P]: P[K]; } : { [K in keyof P]: P[K]; }) => void
+>{ when: value => false } : { when: (value: string) => false; }
+>when : (value: string) => false
+>value => false : (value: string) => false
+>value : string
+>false : false
+
+good1({ when: value => false });
+>good1({ when: value => false }) : void
+>good1 : <P extends Props>(attrs: string extends keyof P ? P : { [K in keyof P]: P[K]; }) => void
+>{ when: value => false } : { when: (value: string) => false; }
+>when : (value: string) => false
+>value => false : (value: string) => false
+>value : string
+>false : false
+
+good2({ when: value => false });
+>good2({ when: value => false }) : void
+>good2 : <P extends Props>(attrs: { [K in keyof P]: P[K]; }) => void
+>{ when: value => false } : { when: (value: string) => false; }
+>when : (value: string) => false
+>value => false : (value: string) => false
+>value : string
+>false : false
+
diff --git a/tests/baselines/reference/jsxChildrenGenericContextualTypes.errors.txt b/tests/baselines/reference/jsxChildrenGenericContextualTypes.errors.txt
index 9c9b85fd04d9f..f9e193d104ba7 100644
--- a/tests/baselines/reference/jsxChildrenGenericContextualTypes.errors.txt
+++ b/tests/baselines/reference/jsxChildrenGenericContextualTypes.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(20,31): error TS2322: Type '(p: IntrinsicAttributes & LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
+tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(20,31): error TS2322: Type '(p: LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
   Type '"y"' is not assignable to type '"x"'.
 tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(21,19): error TS2322: Type '{ children: (p: IntrinsicAttributes & LitProps<"x">) => "y"; prop: "x"; }' is not assignable to type 'IntrinsicAttributes & LitProps<"x" | "y">'.
   Type '{ children: (p: IntrinsicAttributes & LitProps<"x">) => "y"; prop: "x"; }' is not assignable to type 'LitProps<"x" | "y">'.
@@ -39,7 +39,7 @@ tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(22,21): error TS2322:
     // Should error
     const arg = <ElemLit prop="x" children={p => "y"} />
                                   ~~~~~~~~
-!!! error TS2322: Type '(p: IntrinsicAttributes & LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
+!!! error TS2322: Type '(p: LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
 !!! error TS2322:   Type '"y"' is not assignable to type '"x"'.
 !!! related TS6500 tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx:13:34: The expected type comes from property 'children' which is declared here on type 'IntrinsicAttributes & LitProps<"x">'
     const argchild = <ElemLit prop="x">{p => "y"}</ElemLit>
diff --git a/tests/baselines/reference/jsxChildrenGenericContextualTypes.types b/tests/baselines/reference/jsxChildrenGenericContextualTypes.types
index 9287a8a02deed..0e5cf26d4c7c7 100644
--- a/tests/baselines/reference/jsxChildrenGenericContextualTypes.types
+++ b/tests/baselines/reference/jsxChildrenGenericContextualTypes.types
@@ -117,9 +117,9 @@ const arg = <ElemLit prop="x" children={p => "y"} />
 ><ElemLit prop="x" children={p => "y"} /> : JSX.Element
 >ElemLit : <T extends string>(p: LitProps<T>) => JSX.Element
 >prop : "x"
->children : (p: JSX.IntrinsicAttributes & LitProps<"x">) => "y"
->p => "y" : (p: JSX.IntrinsicAttributes & LitProps<"x">) => "y"
->p : JSX.IntrinsicAttributes & LitProps<"x">
+>children : (p: LitProps<"x">) => "y"
+>p => "y" : (p: LitProps<"x">) => "y"
+>p : LitProps<"x">
 >"y" : "y"
 
 const argchild = <ElemLit prop="x">{p => "y"}</ElemLit>
diff --git a/tests/baselines/reference/reactDefaultPropsInferenceSuccess.errors.txt b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.errors.txt
new file mode 100644
index 0000000000000..2ec0fc09c9213
--- /dev/null
+++ b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.errors.txt
@@ -0,0 +1,67 @@
+tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx(26,36): error TS2322: Type '(value: string) => void' is not assignable to type '(value: string) => boolean'.
+  Type 'void' is not assignable to type 'boolean'.
+tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx(48,37): error TS2322: Type '(value: string) => void' is not assignable to type '(value: string) => boolean'.
+  Type 'void' is not assignable to type 'boolean'.
+
+
+==== tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx (2 errors) ====
+    /// <reference path="/.lib/react16.d.ts" />
+    
+    import React from 'react';
+    
+    interface BaseProps {
+      when?: (value: string) => boolean;
+    }
+    
+    interface Props extends BaseProps {
+    }
+    
+    class FieldFeedback<P extends Props = BaseProps> extends React.Component<P> {
+      static defaultProps = {
+        when: () => true
+      };
+    
+      render() {
+        return <div>Hello</div>;
+      }
+    }
+    
+    // OK
+    const Test1 = () => <FieldFeedback when={value => !!value} />;
+    
+    // Error: Void not assignable to boolean
+    const Test2 = () => <FieldFeedback when={value => console.log(value)} />;
+                                       ~~~~
+!!! error TS2322: Type '(value: string) => void' is not assignable to type '(value: string) => boolean'.
+!!! error TS2322:   Type 'void' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx:6:3: The expected type comes from property 'when' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<FieldFeedback<Props>> & Pick<Readonly<{ children?: ReactNode; }> & Readonly<Props>, "children"> & Partial<Pick<Readonly<{ children?: ReactNode; }> & Readonly<Props>, "when">> & Partial<Pick<{ when: () => boolean; }, never>>'
+    
+    
+    interface MyPropsProps extends Props {
+      when: (value: string) => boolean;
+    }
+    
+    class FieldFeedback2<P extends MyPropsProps = MyPropsProps> extends FieldFeedback<P> {
+      static defaultProps = {
+        when: () => true
+      };
+    
+      render() {
+        this.props.when("now"); // OK, always defined
+        return <div>Hello</div>;
+      }
+    }
+    
+    // OK
+    const Test3 = () => <FieldFeedback2 when={value => !!value} />;
+    
+    // Error: Void not assignable to boolean
+    const Test4 = () => <FieldFeedback2 when={value => console.log(value)} />;
+                                        ~~~~
+!!! error TS2322: Type '(value: string) => void' is not assignable to type '(value: string) => boolean'.
+!!! error TS2322:   Type 'void' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx:30:3: The expected type comes from property 'when' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<FieldFeedback2<MyPropsProps>> & Pick<Readonly<{ children?: ReactNode; }> & Readonly<MyPropsProps>, "children"> & Partial<Pick<Readonly<{ children?: ReactNode; }> & Readonly<MyPropsProps>, "when">> & Partial<Pick<{ when: () => boolean; }, never>>'
+    
+    // OK
+    const Test5 = () => <FieldFeedback2 />;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/reactDefaultPropsInferenceSuccess.js b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.js
new file mode 100644
index 0000000000000..84db36ee4da06
--- /dev/null
+++ b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.js
@@ -0,0 +1,112 @@
+//// [reactDefaultPropsInferenceSuccess.tsx]
+/// <reference path="/.lib/react16.d.ts" />
+
+import React from 'react';
+
+interface BaseProps {
+  when?: (value: string) => boolean;
+}
+
+interface Props extends BaseProps {
+}
+
+class FieldFeedback<P extends Props = BaseProps> extends React.Component<P> {
+  static defaultProps = {
+    when: () => true
+  };
+
+  render() {
+    return <div>Hello</div>;
+  }
+}
+
+// OK
+const Test1 = () => <FieldFeedback when={value => !!value} />;
+
+// Error: Void not assignable to boolean
+const Test2 = () => <FieldFeedback when={value => console.log(value)} />;
+
+
+interface MyPropsProps extends Props {
+  when: (value: string) => boolean;
+}
+
+class FieldFeedback2<P extends MyPropsProps = MyPropsProps> extends FieldFeedback<P> {
+  static defaultProps = {
+    when: () => true
+  };
+
+  render() {
+    this.props.when("now"); // OK, always defined
+    return <div>Hello</div>;
+  }
+}
+
+// OK
+const Test3 = () => <FieldFeedback2 when={value => !!value} />;
+
+// Error: Void not assignable to boolean
+const Test4 = () => <FieldFeedback2 when={value => console.log(value)} />;
+
+// OK
+const Test5 = () => <FieldFeedback2 />;
+
+
+//// [reactDefaultPropsInferenceSuccess.js]
+"use strict";
+/// <reference path="react16.d.ts" />
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    }
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+exports.__esModule = true;
+var react_1 = __importDefault(require("react"));
+var FieldFeedback = /** @class */ (function (_super) {
+    __extends(FieldFeedback, _super);
+    function FieldFeedback() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    FieldFeedback.prototype.render = function () {
+        return react_1["default"].createElement("div", null, "Hello");
+    };
+    FieldFeedback.defaultProps = {
+        when: function () { return true; }
+    };
+    return FieldFeedback;
+}(react_1["default"].Component));
+// OK
+var Test1 = function () { return react_1["default"].createElement(FieldFeedback, { when: function (value) { return !!value; } }); };
+// Error: Void not assignable to boolean
+var Test2 = function () { return react_1["default"].createElement(FieldFeedback, { when: function (value) { return console.log(value); } }); };
+var FieldFeedback2 = /** @class */ (function (_super) {
+    __extends(FieldFeedback2, _super);
+    function FieldFeedback2() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    FieldFeedback2.prototype.render = function () {
+        this.props.when("now"); // OK, always defined
+        return react_1["default"].createElement("div", null, "Hello");
+    };
+    FieldFeedback2.defaultProps = {
+        when: function () { return true; }
+    };
+    return FieldFeedback2;
+}(FieldFeedback));
+// OK
+var Test3 = function () { return react_1["default"].createElement(FieldFeedback2, { when: function (value) { return !!value; } }); };
+// Error: Void not assignable to boolean
+var Test4 = function () { return react_1["default"].createElement(FieldFeedback2, { when: function (value) { return console.log(value); } }); };
+// OK
+var Test5 = function () { return react_1["default"].createElement(FieldFeedback2, null); };
diff --git a/tests/baselines/reference/reactDefaultPropsInferenceSuccess.symbols b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.symbols
new file mode 100644
index 0000000000000..dadaf9ea74520
--- /dev/null
+++ b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.symbols
@@ -0,0 +1,131 @@
+=== tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx ===
+/// <reference path="react16.d.ts" />
+
+import React from 'react';
+>React : Symbol(React, Decl(reactDefaultPropsInferenceSuccess.tsx, 2, 6))
+
+interface BaseProps {
+>BaseProps : Symbol(BaseProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 2, 26))
+
+  when?: (value: string) => boolean;
+>when : Symbol(BaseProps.when, Decl(reactDefaultPropsInferenceSuccess.tsx, 4, 21))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 5, 10))
+}
+
+interface Props extends BaseProps {
+>Props : Symbol(Props, Decl(reactDefaultPropsInferenceSuccess.tsx, 6, 1))
+>BaseProps : Symbol(BaseProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 2, 26))
+}
+
+class FieldFeedback<P extends Props = BaseProps> extends React.Component<P> {
+>FieldFeedback : Symbol(FieldFeedback, Decl(reactDefaultPropsInferenceSuccess.tsx, 9, 1))
+>P : Symbol(P, Decl(reactDefaultPropsInferenceSuccess.tsx, 11, 20))
+>Props : Symbol(Props, Decl(reactDefaultPropsInferenceSuccess.tsx, 6, 1))
+>BaseProps : Symbol(BaseProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 2, 26))
+>React.Component : Symbol(React.Component, Decl(react16.d.ts, 345, 54), Decl(react16.d.ts, 349, 94))
+>React : Symbol(React, Decl(reactDefaultPropsInferenceSuccess.tsx, 2, 6))
+>Component : Symbol(React.Component, Decl(react16.d.ts, 345, 54), Decl(react16.d.ts, 349, 94))
+>P : Symbol(P, Decl(reactDefaultPropsInferenceSuccess.tsx, 11, 20))
+
+  static defaultProps = {
+>defaultProps : Symbol(FieldFeedback.defaultProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 11, 77))
+
+    when: () => true
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 12, 25))
+
+  };
+
+  render() {
+>render : Symbol(FieldFeedback.render, Decl(reactDefaultPropsInferenceSuccess.tsx, 14, 4))
+
+    return <div>Hello</div>;
+>div : Symbol(JSX.IntrinsicElements.div, Decl(react16.d.ts, 2420, 114))
+>div : Symbol(JSX.IntrinsicElements.div, Decl(react16.d.ts, 2420, 114))
+  }
+}
+
+// OK
+const Test1 = () => <FieldFeedback when={value => !!value} />;
+>Test1 : Symbol(Test1, Decl(reactDefaultPropsInferenceSuccess.tsx, 22, 5))
+>FieldFeedback : Symbol(FieldFeedback, Decl(reactDefaultPropsInferenceSuccess.tsx, 9, 1))
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 22, 34))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 22, 41))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 22, 41))
+
+// Error: Void not assignable to boolean
+const Test2 = () => <FieldFeedback when={value => console.log(value)} />;
+>Test2 : Symbol(Test2, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 5))
+>FieldFeedback : Symbol(FieldFeedback, Decl(reactDefaultPropsInferenceSuccess.tsx, 9, 1))
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 34))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 41))
+>console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
+>console : Symbol(console, Decl(lib.dom.d.ts, --, --))
+>log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 41))
+
+
+interface MyPropsProps extends Props {
+>MyPropsProps : Symbol(MyPropsProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 73))
+>Props : Symbol(Props, Decl(reactDefaultPropsInferenceSuccess.tsx, 6, 1))
+
+  when: (value: string) => boolean;
+>when : Symbol(MyPropsProps.when, Decl(reactDefaultPropsInferenceSuccess.tsx, 28, 38))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 29, 9))
+}
+
+class FieldFeedback2<P extends MyPropsProps = MyPropsProps> extends FieldFeedback<P> {
+>FieldFeedback2 : Symbol(FieldFeedback2, Decl(reactDefaultPropsInferenceSuccess.tsx, 30, 1))
+>P : Symbol(P, Decl(reactDefaultPropsInferenceSuccess.tsx, 32, 21))
+>MyPropsProps : Symbol(MyPropsProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 73))
+>MyPropsProps : Symbol(MyPropsProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 25, 73))
+>FieldFeedback : Symbol(FieldFeedback, Decl(reactDefaultPropsInferenceSuccess.tsx, 9, 1))
+>P : Symbol(P, Decl(reactDefaultPropsInferenceSuccess.tsx, 32, 21))
+
+  static defaultProps = {
+>defaultProps : Symbol(FieldFeedback2.defaultProps, Decl(reactDefaultPropsInferenceSuccess.tsx, 32, 86))
+
+    when: () => true
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 33, 25))
+
+  };
+
+  render() {
+>render : Symbol(FieldFeedback2.render, Decl(reactDefaultPropsInferenceSuccess.tsx, 35, 4))
+
+    this.props.when("now"); // OK, always defined
+>this.props.when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 28, 38))
+>this.props : Symbol(React.Component.props, Decl(react16.d.ts, 367, 32))
+>this : Symbol(FieldFeedback2, Decl(reactDefaultPropsInferenceSuccess.tsx, 30, 1))
+>props : Symbol(React.Component.props, Decl(react16.d.ts, 367, 32))
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 28, 38))
+
+    return <div>Hello</div>;
+>div : Symbol(JSX.IntrinsicElements.div, Decl(react16.d.ts, 2420, 114))
+>div : Symbol(JSX.IntrinsicElements.div, Decl(react16.d.ts, 2420, 114))
+  }
+}
+
+// OK
+const Test3 = () => <FieldFeedback2 when={value => !!value} />;
+>Test3 : Symbol(Test3, Decl(reactDefaultPropsInferenceSuccess.tsx, 44, 5))
+>FieldFeedback2 : Symbol(FieldFeedback2, Decl(reactDefaultPropsInferenceSuccess.tsx, 30, 1))
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 44, 35))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 44, 42))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 44, 42))
+
+// Error: Void not assignable to boolean
+const Test4 = () => <FieldFeedback2 when={value => console.log(value)} />;
+>Test4 : Symbol(Test4, Decl(reactDefaultPropsInferenceSuccess.tsx, 47, 5))
+>FieldFeedback2 : Symbol(FieldFeedback2, Decl(reactDefaultPropsInferenceSuccess.tsx, 30, 1))
+>when : Symbol(when, Decl(reactDefaultPropsInferenceSuccess.tsx, 47, 35))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 47, 42))
+>console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
+>console : Symbol(console, Decl(lib.dom.d.ts, --, --))
+>log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
+>value : Symbol(value, Decl(reactDefaultPropsInferenceSuccess.tsx, 47, 42))
+
+// OK
+const Test5 = () => <FieldFeedback2 />;
+>Test5 : Symbol(Test5, Decl(reactDefaultPropsInferenceSuccess.tsx, 50, 5))
+>FieldFeedback2 : Symbol(FieldFeedback2, Decl(reactDefaultPropsInferenceSuccess.tsx, 30, 1))
+
diff --git a/tests/baselines/reference/reactDefaultPropsInferenceSuccess.types b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.types
new file mode 100644
index 0000000000000..91d918b092347
--- /dev/null
+++ b/tests/baselines/reference/reactDefaultPropsInferenceSuccess.types
@@ -0,0 +1,146 @@
+=== tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx ===
+/// <reference path="react16.d.ts" />
+
+import React from 'react';
+>React : typeof React
+
+interface BaseProps {
+  when?: (value: string) => boolean;
+>when : ((value: string) => boolean) | undefined
+>value : string
+}
+
+interface Props extends BaseProps {
+}
+
+class FieldFeedback<P extends Props = BaseProps> extends React.Component<P> {
+>FieldFeedback : FieldFeedback<P>
+>React.Component : React.Component<P, {}, any>
+>React : typeof React
+>Component : typeof React.Component
+
+  static defaultProps = {
+>defaultProps : { when: () => boolean; }
+>{    when: () => true  } : { when: () => boolean; }
+
+    when: () => true
+>when : () => boolean
+>() => true : () => boolean
+>true : true
+
+  };
+
+  render() {
+>render : () => JSX.Element
+
+    return <div>Hello</div>;
+><div>Hello</div> : JSX.Element
+>div : any
+>div : any
+  }
+}
+
+// OK
+const Test1 = () => <FieldFeedback when={value => !!value} />;
+>Test1 : () => JSX.Element
+>() => <FieldFeedback when={value => !!value} /> : () => JSX.Element
+><FieldFeedback when={value => !!value} /> : JSX.Element
+>FieldFeedback : typeof FieldFeedback
+>when : (value: string) => boolean
+>value => !!value : (value: string) => boolean
+>value : string
+>!!value : boolean
+>!value : boolean
+>value : string
+
+// Error: Void not assignable to boolean
+const Test2 = () => <FieldFeedback when={value => console.log(value)} />;
+>Test2 : () => JSX.Element
+>() => <FieldFeedback when={value => console.log(value)} /> : () => JSX.Element
+><FieldFeedback when={value => console.log(value)} /> : JSX.Element
+>FieldFeedback : typeof FieldFeedback
+>when : (value: string) => void
+>value => console.log(value) : (value: string) => void
+>value : string
+>console.log(value) : void
+>console.log : (message?: any, ...optionalParams: any[]) => void
+>console : Console
+>log : (message?: any, ...optionalParams: any[]) => void
+>value : string
+
+
+interface MyPropsProps extends Props {
+  when: (value: string) => boolean;
+>when : (value: string) => boolean
+>value : string
+}
+
+class FieldFeedback2<P extends MyPropsProps = MyPropsProps> extends FieldFeedback<P> {
+>FieldFeedback2 : FieldFeedback2<P>
+>FieldFeedback : FieldFeedback<P>
+
+  static defaultProps = {
+>defaultProps : { when: () => boolean; }
+>{    when: () => true  } : { when: () => boolean; }
+
+    when: () => true
+>when : () => boolean
+>() => true : () => boolean
+>true : true
+
+  };
+
+  render() {
+>render : () => JSX.Element
+
+    this.props.when("now"); // OK, always defined
+>this.props.when("now") : boolean
+>this.props.when : P["when"]
+>this.props : Readonly<{ children?: React.ReactNode; }> & Readonly<P>
+>this : this
+>props : Readonly<{ children?: React.ReactNode; }> & Readonly<P>
+>when : P["when"]
+>"now" : "now"
+
+    return <div>Hello</div>;
+><div>Hello</div> : JSX.Element
+>div : any
+>div : any
+  }
+}
+
+// OK
+const Test3 = () => <FieldFeedback2 when={value => !!value} />;
+>Test3 : () => JSX.Element
+>() => <FieldFeedback2 when={value => !!value} /> : () => JSX.Element
+><FieldFeedback2 when={value => !!value} /> : JSX.Element
+>FieldFeedback2 : typeof FieldFeedback2
+>when : (value: string) => boolean
+>value => !!value : (value: string) => boolean
+>value : string
+>!!value : boolean
+>!value : boolean
+>value : string
+
+// Error: Void not assignable to boolean
+const Test4 = () => <FieldFeedback2 when={value => console.log(value)} />;
+>Test4 : () => JSX.Element
+>() => <FieldFeedback2 when={value => console.log(value)} /> : () => JSX.Element
+><FieldFeedback2 when={value => console.log(value)} /> : JSX.Element
+>FieldFeedback2 : typeof FieldFeedback2
+>when : (value: string) => void
+>value => console.log(value) : (value: string) => void
+>value : string
+>console.log(value) : void
+>console.log : (message?: any, ...optionalParams: any[]) => void
+>console : Console
+>log : (message?: any, ...optionalParams: any[]) => void
+>value : string
+
+// OK
+const Test5 = () => <FieldFeedback2 />;
+>Test5 : () => JSX.Element
+>() => <FieldFeedback2 /> : () => JSX.Element
+><FieldFeedback2 /> : JSX.Element
+>FieldFeedback2 : typeof FieldFeedback2
+
diff --git a/tests/cases/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.ts b/tests/cases/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.ts
new file mode 100644
index 0000000000000..f585022cccfa7
--- /dev/null
+++ b/tests/cases/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.ts
@@ -0,0 +1,16 @@
+// @strict: true
+// repro from https://github.com/Microsoft/TypeScript/issues/26395
+interface Props {
+    when: (value: string) => boolean;
+}
+
+function bad<P extends Props>(
+    attrs: string extends keyof P ? { [K in keyof P]: P[K] } : { [K in keyof P]: P[K] }) { }
+function good1<P extends Props>(
+    attrs: string extends keyof P ? P : { [K in keyof P]: P[K] }) { }
+function good2<P extends Props>(
+    attrs: { [K in keyof P]: P[K] }) { }
+
+bad({ when: value => false });
+good1({ when: value => false });
+good2({ when: value => false });
\ No newline at end of file
diff --git a/tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx b/tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx
new file mode 100644
index 0000000000000..9de13d119df47
--- /dev/null
+++ b/tests/cases/compiler/reactDefaultPropsInferenceSuccess.tsx
@@ -0,0 +1,54 @@
+// @jsx: react
+// @strict: true
+// @esModuleInterop: true
+/// <reference path="/.lib/react16.d.ts" />
+
+import React from 'react';
+
+interface BaseProps {
+  when?: (value: string) => boolean;
+}
+
+interface Props extends BaseProps {
+}
+
+class FieldFeedback<P extends Props = BaseProps> extends React.Component<P> {
+  static defaultProps = {
+    when: () => true
+  };
+
+  render() {
+    return <div>Hello</div>;
+  }
+}
+
+// OK
+const Test1 = () => <FieldFeedback when={value => !!value} />;
+
+// Error: Void not assignable to boolean
+const Test2 = () => <FieldFeedback when={value => console.log(value)} />;
+
+
+interface MyPropsProps extends Props {
+  when: (value: string) => boolean;
+}
+
+class FieldFeedback2<P extends MyPropsProps = MyPropsProps> extends FieldFeedback<P> {
+  static defaultProps = {
+    when: () => true
+  };
+
+  render() {
+    this.props.when("now"); // OK, always defined
+    return <div>Hello</div>;
+  }
+}
+
+// OK
+const Test3 = () => <FieldFeedback2 when={value => !!value} />;
+
+// Error: Void not assignable to boolean
+const Test4 = () => <FieldFeedback2 when={value => console.log(value)} />;
+
+// OK
+const Test5 = () => <FieldFeedback2 />;
diff --git a/tests/lib/react16.d.ts b/tests/lib/react16.d.ts
new file mode 100644
index 0000000000000..4b91fb0c6fed9
--- /dev/null
+++ b/tests/lib/react16.d.ts
@@ -0,0 +1,2569 @@
+// Type definitions for React 16.4
+// Project: http://facebook.github.io/react/
+// Definitions by: Asana <https://asana.com>
+//                 AssureSign <http://www.assuresign.com>
+//                 Microsoft <https://microsoft.com>
+//                 John Reilly <https://github.com/johnnyreilly>
+//                 Benoit Benezech <https://github.com/bbenezech>
+//                 Patricio Zavolinsky <https://github.com/pzavolinsky>
+//                 Digiguru <https://github.com/digiguru>
+//                 Eric Anderson <https://github.com/ericanderson>
+//                 Albert Kurniawan <https://github.com/morcerf>
+//                 Tanguy Krotoff <https://github.com/tkrotoff>
+//                 Dovydas Navickas <https://github.com/DovydasNavickas>
+//                 Stéphane Goetz <https://github.com/onigoetz>
+//                 Josh Rutherford <https://github.com/theruther4d>
+//                 Guilherme Hübner <https://github.com/guilhermehubner>
+//                 Ferdy Budhidharma <https://github.com/ferdaber>
+//                 Johann Rakotoharisoa <https://github.com/jrakotoharisoa>
+//                 Olivier Pascal <https://github.com/pascaloliv>
+//                 Martin Hochel <https://github.com/hotell>
+//                 Frank Li <https://github.com/franklixuefei>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.8
+
+interface HTMLWebViewElement extends HTMLElement {}
+
+declare module "prop-types" {
+    // Type definitions for prop-types 15.5
+    // Project: https://github.com/reactjs/prop-types
+    // Definitions by: DovydasNavickas <https://github.com/DovydasNavickas>
+    //                 Ferdy Budhidharma <https://github.com/ferdaber>
+    // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+    // TypeScript Version: 2.8
+
+    import { ReactNode, ReactElement } from 'react';
+
+    export const nominalTypeHack: unique symbol;
+
+    export type IsOptional<T> = undefined | null extends T ? true : undefined extends T ? true : null extends T ? true : false;
+
+    export type RequiredKeys<V> = { [K in keyof V]: V[K] extends Validator<infer T> ? IsOptional<T> extends true ? never : K : never }[keyof V];
+    export type OptionalKeys<V> = Exclude<keyof V, RequiredKeys<V>>;
+    export type InferPropsInner<V> = { [K in keyof V]: InferType<V[K]>; };
+
+    export interface Validator<T> {
+        (props: object, propName: string, componentName: string, location: string, propFullName: string): Error | null;
+        [nominalTypeHack]?: T;
+    }
+
+    export interface Requireable<T> extends Validator<T | undefined | null> {
+        isRequired: Validator<NonNullable<T>>;
+    }
+
+    export type ValidationMap<T> = { [K in keyof T]-?: Validator<T[K]> };
+
+    export type InferType<V> = V extends Validator<infer T> ? T : any;
+    export type InferProps<V> =
+        & InferPropsInner<Pick<V, RequiredKeys<V>>>
+        & Partial<InferPropsInner<Pick<V, OptionalKeys<V>>>>;
+
+    export const any: Requireable<any>;
+    export const array: Requireable<any[]>;
+    export const bool: Requireable<boolean>;
+    export const func: Requireable<(...args: any[]) => any>;
+    export const number: Requireable<number>;
+    export const object: Requireable<object>;
+    export const string: Requireable<string>;
+    export const node: Requireable<ReactNode>;
+    export const element: Requireable<ReactElement<any>>;
+    export const symbol: Requireable<symbol>;
+    export function instanceOf<T>(expectedClass: new (...args: any[]) => T): Requireable<T>;
+    export function oneOf<T>(types: T[]): Requireable<T>;
+    export function oneOfType<T extends Validator<any>>(types: T[]): Requireable<NonNullable<InferType<T>>>;
+    export function arrayOf<T>(type: Validator<T>): Requireable<T[]>;
+    export function objectOf<T>(type: Validator<T>): Requireable<{ [K in keyof any]: T; }>;
+    export function shape<P extends ValidationMap<any>>(type: P): Requireable<InferProps<P>>;
+    export function exact<P extends ValidationMap<any>>(type: P): Requireable<Required<InferProps<P>>>;
+
+    /**
+     * Assert that the values match with the type specs.
+     * Error messages are memorized and will only be shown once.
+     *
+     * @param typeSpecs Map of name to a ReactPropType
+     * @param values Runtime values that need to be type-checked
+     * @param location e.g. "prop", "context", "child context"
+     * @param componentName Name of the component for error messages.
+     * @param getStack Returns the component stack.
+     */
+    export function checkPropTypes(typeSpecs: any, values: any, location: string, componentName: string, getStack?: () => any): void;
+
+}
+
+declare module "react" {
+
+    import * as PropTypes from 'prop-types';
+
+    type NativeAnimationEvent = AnimationEvent;
+    type NativeClipboardEvent = ClipboardEvent;
+    type NativeCompositionEvent = CompositionEvent;
+    type NativeDragEvent = DragEvent;
+    type NativeFocusEvent = FocusEvent;
+    type NativeKeyboardEvent = KeyboardEvent;
+    type NativeMouseEvent = MouseEvent;
+    type NativeTouchEvent = TouchEvent;
+    type NativePointerEvent = PointerEvent;
+    type NativeTransitionEvent = TransitionEvent;
+    type NativeUIEvent = UIEvent;
+    type NativeWheelEvent = WheelEvent;
+
+    // tslint:disable-next-line:export-just-namespace
+    export = React;
+
+    namespace React {
+        //
+        // React Elements
+        // ----------------------------------------------------------------------
+
+        type ReactType<P = any> = string | ComponentType<P>;
+        type ComponentType<P = {}> = ComponentClass<P> | StatelessComponent<P>;
+
+        type Key = string | number;
+
+        interface RefObject<T> {
+            readonly current: T | null;
+        }
+
+        type Ref<T> = string | { bivarianceHack(instance: T | null): any }["bivarianceHack"] | RefObject<T>;
+
+        type ComponentState = any;
+
+        interface Attributes {
+            key?: Key;
+        }
+        interface ClassAttributes<T> extends Attributes {
+            ref?: Ref<T>;
+        }
+
+        interface ReactElement<P> {
+            type: string | ComponentClass<P> | SFC<P>;
+            props: P;
+            key: Key | null;
+        }
+
+        interface SFCElement<P> extends ReactElement<P> {
+            type: SFC<P>;
+        }
+
+        type CElement<P, T extends Component<P, ComponentState>> = ComponentElement<P, T>;
+        interface ComponentElement<P, T extends Component<P, ComponentState>> extends ReactElement<P> {
+            type: ComponentClass<P>;
+            ref?: Ref<T>;
+        }
+
+        type ClassicElement<P> = CElement<P, ClassicComponent<P, ComponentState>>;
+
+        // string fallback for custom web-components
+        interface DOMElement<P extends HTMLAttributes<T> | SVGAttributes<T>, T extends Element> extends ReactElement<P> {
+            type: string;
+            ref: Ref<T>;
+        }
+
+        // ReactHTML for ReactHTMLElement
+        // tslint:disable-next-line:no-empty-interface
+        interface ReactHTMLElement<T extends HTMLElement> extends DetailedReactHTMLElement<AllHTMLAttributes<T>, T> { }
+
+        interface DetailedReactHTMLElement<P extends HTMLAttributes<T>, T extends HTMLElement> extends DOMElement<P, T> {
+            type: keyof ReactHTML;
+        }
+
+        // ReactSVG for ReactSVGElement
+        interface ReactSVGElement extends DOMElement<SVGAttributes<SVGElement>, SVGElement> {
+            type: keyof ReactSVG;
+        }
+
+        interface ReactPortal extends ReactElement<any> {
+            key: Key | null;
+            children: ReactNode;
+        }
+
+        //
+        // Factories
+        // ----------------------------------------------------------------------
+
+        type Factory<P> = (props?: Attributes & P, ...children: ReactNode[]) => ReactElement<P>;
+
+        type SFCFactory<P> = (props?: Attributes & P, ...children: ReactNode[]) => SFCElement<P>;
+
+        type ComponentFactory<P, T extends Component<P, ComponentState>> =
+            (props?: ClassAttributes<T> & P, ...children: ReactNode[]) => CElement<P, T>;
+
+        type CFactory<P, T extends Component<P, ComponentState>> = ComponentFactory<P, T>;
+        type ClassicFactory<P> = CFactory<P, ClassicComponent<P, ComponentState>>;
+
+        type DOMFactory<P extends DOMAttributes<T>, T extends Element> =
+            (props?: ClassAttributes<T> & P | null, ...children: ReactNode[]) => DOMElement<P, T>;
+
+        // tslint:disable-next-line:no-empty-interface
+        interface HTMLFactory<T extends HTMLElement> extends DetailedHTMLFactory<AllHTMLAttributes<T>, T> { }
+
+        interface DetailedHTMLFactory<P extends HTMLAttributes<T>, T extends HTMLElement> extends DOMFactory<P, T> {
+            (props?: ClassAttributes<T> & P | null, ...children: ReactNode[]): DetailedReactHTMLElement<P, T>;
+        }
+
+        interface SVGFactory extends DOMFactory<SVGAttributes<SVGElement>, SVGElement> {
+            (props?: ClassAttributes<SVGElement> & SVGAttributes<SVGElement> | null, ...children: ReactNode[]): ReactSVGElement;
+        }
+
+        //
+        // React Nodes
+        // http://facebook.github.io/react/docs/glossary.html
+        // ----------------------------------------------------------------------
+
+        type ReactText = string | number;
+        type ReactChild = ReactElement<any> | ReactText;
+
+        interface ReactNodeArray extends Array<ReactNode> { }
+        type ReactFragment = {} | ReactNodeArray;
+        type ReactNode = ReactChild | ReactFragment | ReactPortal | string | number | boolean | null | undefined;
+
+        //
+        // Top Level API
+        // ----------------------------------------------------------------------
+
+        // DOM Elements
+        function createFactory<T extends HTMLElement>(
+            type: keyof ReactHTML): HTMLFactory<T>;
+        function createFactory(
+            type: keyof ReactSVG): SVGFactory;
+        function createFactory<P extends DOMAttributes<T>, T extends Element>(
+            type: string): DOMFactory<P, T>;
+
+        // Custom components
+        function createFactory<P>(type: SFC<P>): SFCFactory<P>;
+        function createFactory<P>(
+            type: ClassType<P, ClassicComponent<P, ComponentState>, ClassicComponentClass<P>>): CFactory<P, ClassicComponent<P, ComponentState>>;
+        function createFactory<P, T extends Component<P, ComponentState>, C extends ComponentClass<P>>(
+            type: ClassType<P, T, C>): CFactory<P, T>;
+        function createFactory<P>(type: ComponentClass<P>): Factory<P>;
+
+        // DOM Elements
+        // TODO: generalize this to everything in `keyof ReactHTML`, not just "input"
+        function createElement(
+            type: "input",
+            props?: InputHTMLAttributes<HTMLInputElement> & ClassAttributes<HTMLInputElement> | null,
+            ...children: ReactNode[]): DetailedReactHTMLElement<InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>;
+        function createElement<P extends HTMLAttributes<T>, T extends HTMLElement>(
+            type: keyof ReactHTML,
+            props?: ClassAttributes<T> & P | null,
+            ...children: ReactNode[]): DetailedReactHTMLElement<P, T>;
+        function createElement<P extends SVGAttributes<T>, T extends SVGElement>(
+            type: keyof ReactSVG,
+            props?: ClassAttributes<T> & P | null,
+            ...children: ReactNode[]): ReactSVGElement;
+        function createElement<P extends DOMAttributes<T>, T extends Element>(
+            type: string,
+            props?: ClassAttributes<T> & P | null,
+            ...children: ReactNode[]): DOMElement<P, T>;
+
+        // Custom components
+        function createElement<P>(
+            type: SFC<P>,
+            props?: Attributes & P | null,
+            ...children: ReactNode[]): SFCElement<P>;
+        function createElement<P>(
+            type: ClassType<P, ClassicComponent<P, ComponentState>, ClassicComponentClass<P>>,
+            props?: ClassAttributes<ClassicComponent<P, ComponentState>> & P | null,
+            ...children: ReactNode[]): CElement<P, ClassicComponent<P, ComponentState>>;
+        function createElement<P, T extends Component<P, ComponentState>, C extends ComponentClass<P>>(
+            type: ClassType<P, T, C>,
+            props?: ClassAttributes<T> & P | null,
+            ...children: ReactNode[]): CElement<P, T>;
+        function createElement<P>(
+            type: SFC<P> | ComponentClass<P> | string,
+            props?: Attributes & P | null,
+            ...children: ReactNode[]): ReactElement<P>;
+
+        // DOM Elements
+        // ReactHTMLElement
+        function cloneElement<P extends HTMLAttributes<T>, T extends HTMLElement>(
+            element: DetailedReactHTMLElement<P, T>,
+            props?: P,
+            ...children: ReactNode[]): DetailedReactHTMLElement<P, T>;
+        // ReactHTMLElement, less specific
+        function cloneElement<P extends HTMLAttributes<T>, T extends HTMLElement>(
+            element: ReactHTMLElement<T>,
+            props?: P,
+            ...children: ReactNode[]): ReactHTMLElement<T>;
+        // SVGElement
+        function cloneElement<P extends SVGAttributes<T>, T extends SVGElement>(
+            element: ReactSVGElement,
+            props?: P,
+            ...children: ReactNode[]): ReactSVGElement;
+        // DOM Element (has to be the last, because type checking stops at first overload that fits)
+        function cloneElement<P extends DOMAttributes<T>, T extends Element>(
+            element: DOMElement<P, T>,
+            props?: DOMAttributes<T> & P,
+            ...children: ReactNode[]): DOMElement<P, T>;
+
+        // Custom components
+        function cloneElement<P>(
+            element: SFCElement<P>,
+            props?: Partial<P> & Attributes,
+            ...children: ReactNode[]): SFCElement<P>;
+        function cloneElement<P, T extends Component<P, ComponentState>>(
+            element: CElement<P, T>,
+            props?: Partial<P> & ClassAttributes<T>,
+            ...children: ReactNode[]): CElement<P, T>;
+        function cloneElement<P>(
+            element: ReactElement<P>,
+            props?: Partial<P> & Attributes,
+            ...children: ReactNode[]): ReactElement<P>;
+
+        // Context via RenderProps
+        interface ProviderProps<T> {
+            value: T;
+            children?: ReactNode;
+        }
+
+        interface ConsumerProps<T> {
+            children: (value: T) => ReactNode;
+            unstable_observedBits?: number;
+        }
+
+        type Provider<T> = ComponentType<ProviderProps<T>>;
+        type Consumer<T> = ComponentType<ConsumerProps<T>>;
+        interface Context<T> {
+            Provider: Provider<T>;
+            Consumer: Consumer<T>;
+        }
+        function createContext<T>(
+            defaultValue: T,
+            calculateChangedBits?: (prev: T, next: T) => number
+        ): Context<T>;
+
+        function isValidElement<P>(object: {} | null | undefined): object is ReactElement<P>;
+
+        const Children: ReactChildren;
+        const Fragment: ComponentType;
+        const StrictMode: ComponentType;
+        const version: string;
+
+        //
+        // Component API
+        // ----------------------------------------------------------------------
+
+        type ReactInstance = Component<any> | Element;
+
+        // Base component for plain JS classes
+        // tslint:disable-next-line:no-empty-interface
+        interface Component<P = {}, S = {}, SS = any> extends ComponentLifecycle<P, S, SS> { }
+        class Component<P, S> {
+            constructor(props: Readonly<P>);
+            /**
+             * @deprecated
+             * https://reactjs.org/docs/legacy-context.html
+             */
+            constructor(props: P, context?: any);
+
+            // We MUST keep setState() as a unified signature because it allows proper checking of the method return type.
+            // See: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/18365#issuecomment-351013257
+            // Also, the ` | S` allows intellisense to not be dumbisense
+            setState<K extends keyof S>(
+                state: ((prevState: Readonly<S>, props: Readonly<P>) => (Pick<S, K> | S | null)) | (Pick<S, K> | S | null),
+                callback?: () => void
+            ): void;
+
+            forceUpdate(callBack?: () => void): void;
+            render(): ReactNode;
+
+            // React.Props<T> is now deprecated, which means that the `children`
+            // property is not available on `P` by default, even though you can
+            // always pass children as variadic arguments to `createElement`.
+            // In the future, if we can define its call signature conditionally
+            // on the existence of `children` in `P`, then we should remove this.
+            readonly props: Readonly<{ children?: ReactNode }> & Readonly<P>;
+            state: Readonly<S>;
+            /**
+             * @deprecated
+             * https://reactjs.org/docs/legacy-context.html
+             */
+            context: any;
+            /**
+             * @deprecated
+             * https://reactjs.org/docs/refs-and-the-dom.html#legacy-api-string-refs
+             */
+            refs: {
+                [key: string]: ReactInstance
+            };
+        }
+
+        class PureComponent<P = {}, S = {}, SS = any> extends Component<P, S, SS> { }
+
+        interface ClassicComponent<P = {}, S = {}> extends Component<P, S> {
+            replaceState(nextState: S, callback?: () => void): void;
+            isMounted(): boolean;
+            getInitialState?(): S;
+        }
+
+        interface ChildContextProvider<CC> {
+            getChildContext(): CC;
+        }
+
+        //
+        // Class Interfaces
+        // ----------------------------------------------------------------------
+
+        type SFC<P = {}> = StatelessComponent<P>;
+        interface StatelessComponent<P = {}> {
+            (props: P & { children?: ReactNode }, context?: any): ReactElement<any> | null;
+            propTypes?: ValidationMap<P>;
+            contextTypes?: ValidationMap<any>;
+            defaultProps?: Partial<P>;
+            displayName?: string;
+        }
+
+        interface RefForwardingComponent<T, P = {}> {
+            (props: P & { children?: ReactNode }, ref?: Ref<T>): ReactElement<any> | null;
+            propTypes?: ValidationMap<P>;
+            contextTypes?: ValidationMap<any>;
+            defaultProps?: Partial<P>;
+            displayName?: string;
+        }
+
+        interface ComponentClass<P = {}, S = ComponentState> extends StaticLifecycle<P, S> {
+            new(props: P, context?: any): Component<P, S>;
+            propTypes?: ValidationMap<P>;
+            contextTypes?: ValidationMap<any>;
+            childContextTypes?: ValidationMap<any>;
+            defaultProps?: Partial<P>;
+            displayName?: string;
+        }
+
+        interface ClassicComponentClass<P = {}> extends ComponentClass<P> {
+            new(props: P, context?: any): ClassicComponent<P, ComponentState>;
+            getDefaultProps?(): P;
+        }
+
+        /**
+         * We use an intersection type to infer multiple type parameters from
+         * a single argument, which is useful for many top-level API defs.
+         * See https://github.com/Microsoft/TypeScript/issues/7234 for more info.
+         */
+        type ClassType<P, T extends Component<P, ComponentState>, C extends ComponentClass<P>> =
+            C &
+            (new (props: P, context?: any) => T) &
+            (new (props: P, context?: any) => { props: P });
+
+        //
+        // Component Specs and Lifecycle
+        // ----------------------------------------------------------------------
+
+        // This should actually be something like `Lifecycle<P, S> | DeprecatedLifecycle<P, S>`,
+        // as React will _not_ call the deprecated lifecycle methods if any of the new lifecycle
+        // methods are present.
+        interface ComponentLifecycle<P, S, SS = any> extends NewLifecycle<P, S, SS>, DeprecatedLifecycle<P, S> {
+            /**
+             * Called immediately after a component is mounted. Setting state here will trigger re-rendering.
+             */
+            componentDidMount?(): void;
+            /**
+             * Called to determine whether the change in props and state should trigger a re-render.
+             *
+             * `Component` always returns true.
+             * `PureComponent` implements a shallow comparison on props and state and returns true if any
+             * props or states have changed.
+             *
+             * If false is returned, `Component#render`, `componentWillUpdate`
+             * and `componentDidUpdate` will not be called.
+             */
+            shouldComponentUpdate?(nextProps: Readonly<P>, nextState: Readonly<S>, nextContext: any): boolean;
+            /**
+             * Called immediately before a component is destroyed. Perform any necessary cleanup in this method, such as
+             * cancelled network requests, or cleaning up any DOM elements created in `componentDidMount`.
+             */
+            componentWillUnmount?(): void;
+            /**
+             * Catches exceptions generated in descendant components. Unhandled exceptions will cause
+             * the entire component tree to unmount.
+             */
+            componentDidCatch?(error: Error, errorInfo: ErrorInfo): void;
+        }
+
+        // Unfortunately, we have no way of declaring that the component constructor must implement this
+        interface StaticLifecycle<P, S> {
+            getDerivedStateFromProps?: GetDerivedStateFromProps<P, S>;
+        }
+
+        type GetDerivedStateFromProps<P, S> =
+            /**
+             * Returns an update to a component's state based on its new props and old state.
+             *
+             * Note: its presence prevents any of the deprecated lifecycle methods from being invoked
+             */
+            (nextProps: Readonly<P>, prevState: S) => Partial<S> | null;
+
+        // This should be "infer SS" but can't use it yet
+        interface NewLifecycle<P, S, SS> {
+            /**
+             * Runs before React applies the result of `render` to the document, and
+             * returns an object to be given to componentDidUpdate. Useful for saving
+             * things such as scroll position before `render` causes changes to it.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate prevents any of the deprecated
+             * lifecycle events from running.
+             */
+            getSnapshotBeforeUpdate?(prevProps: Readonly<P>, prevState: Readonly<S>): SS | null;
+            /**
+             * Called immediately after updating occurs. Not called for the initial render.
+             *
+             * The snapshot is only present if getSnapshotBeforeUpdate is present and returns non-null.
+             */
+            componentDidUpdate?(prevProps: Readonly<P>, prevState: Readonly<S>, snapshot?: SS): void;
+        }
+
+        interface DeprecatedLifecycle<P, S> {
+            /**
+             * Called immediately before mounting occurs, and before `Component#render`.
+             * Avoid introducing any side-effects or subscriptions in this method.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
+             * prevents this from being invoked.
+             *
+             * @deprecated 16.3, use componentDidMount or the constructor instead; will stop working in React 17
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
+             */
+            componentWillMount?(): void;
+            /**
+             * Called immediately before mounting occurs, and before `Component#render`.
+             * Avoid introducing any side-effects or subscriptions in this method.
+             *
+             * This method will not stop working in React 17.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
+             * prevents this from being invoked.
+             *
+             * @deprecated 16.3, use componentDidMount or the constructor instead
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
+             */
+            UNSAFE_componentWillMount?(): void;
+            /**
+             * Called when the component may be receiving new props.
+             * React may call this even if props have not changed, so be sure to compare new and existing
+             * props if you only want to handle changes.
+             *
+             * Calling `Component#setState` generally does not trigger this method.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
+             * prevents this from being invoked.
+             *
+             * @deprecated 16.3, use static getDerivedStateFromProps instead; will stop working in React 17
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
+             */
+            componentWillReceiveProps?(nextProps: Readonly<P>, nextContext: any): void;
+            /**
+             * Called when the component may be receiving new props.
+             * React may call this even if props have not changed, so be sure to compare new and existing
+             * props if you only want to handle changes.
+             *
+             * Calling `Component#setState` generally does not trigger this method.
+             *
+             * This method will not stop working in React 17.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
+             * prevents this from being invoked.
+             *
+             * @deprecated 16.3, use static getDerivedStateFromProps instead
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
+             */
+            UNSAFE_componentWillReceiveProps?(nextProps: Readonly<P>, nextContext: any): void;
+            /**
+             * Called immediately before rendering when new props or state is received. Not called for the initial render.
+             *
+             * Note: You cannot call `Component#setState` here.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
+             * prevents this from being invoked.
+             *
+             * @deprecated 16.3, use getSnapshotBeforeUpdate instead; will stop working in React 17
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
+             */
+            componentWillUpdate?(nextProps: Readonly<P>, nextState: Readonly<S>, nextContext: any): void;
+            /**
+             * Called immediately before rendering when new props or state is received. Not called for the initial render.
+             *
+             * Note: You cannot call `Component#setState` here.
+             *
+             * This method will not stop working in React 17.
+             *
+             * Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
+             * prevents this from being invoked.
+             *
+             * @deprecated 16.3, use getSnapshotBeforeUpdate instead
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update
+             * @see https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path
+             */
+            UNSAFE_componentWillUpdate?(nextProps: Readonly<P>, nextState: Readonly<S>, nextContext: any): void;
+        }
+
+        interface Mixin<P, S> extends ComponentLifecycle<P, S> {
+            mixins?: Array<Mixin<P, S>>;
+            statics?: {
+                [key: string]: any;
+            };
+
+            displayName?: string;
+            propTypes?: ValidationMap<any>;
+            contextTypes?: ValidationMap<any>;
+            childContextTypes?: ValidationMap<any>;
+
+            getDefaultProps?(): P;
+            getInitialState?(): S;
+        }
+
+        interface ComponentSpec<P, S> extends Mixin<P, S> {
+            render(): ReactNode;
+
+            [propertyName: string]: any;
+        }
+
+        function createRef<T>(): RefObject<T>;
+
+        function forwardRef<T, P = {}>(Component: RefForwardingComponent<T, P>): ComponentType<P & ClassAttributes<T>>;
+
+        //
+        // Event System
+        // ----------------------------------------------------------------------
+
+        interface SyntheticEvent<T = Element> {
+            bubbles: boolean;
+            /**
+             * A reference to the element on which the event listener is registered.
+             */
+            currentTarget: EventTarget & T;
+            cancelable: boolean;
+            defaultPrevented: boolean;
+            eventPhase: number;
+            isTrusted: boolean;
+            nativeEvent: Event;
+            preventDefault(): void;
+            isDefaultPrevented(): boolean;
+            stopPropagation(): void;
+            isPropagationStopped(): boolean;
+            persist(): void;
+            // If you thought this should be `EventTarget & T`, see https://github.com/DefinitelyTyped/DefinitelyTyped/pull/12239
+            /**
+             * A reference to the element from which the event was originally dispatched.
+             * This might be a child element to the element on which the event listener is registered.
+             *
+             * @see currentTarget
+             */
+            target: EventTarget;
+            timeStamp: number;
+            type: string;
+        }
+
+        interface ClipboardEvent<T = Element> extends SyntheticEvent<T> {
+            clipboardData: DataTransfer;
+            nativeEvent: NativeClipboardEvent;
+        }
+
+        interface CompositionEvent<T = Element> extends SyntheticEvent<T> {
+            data: string;
+            nativeEvent: NativeCompositionEvent;
+        }
+
+        interface DragEvent<T = Element> extends MouseEvent<T> {
+            dataTransfer: DataTransfer;
+            nativeEvent: NativeDragEvent;
+        }
+
+        interface PointerEvent<T = Element> extends MouseEvent<T> {
+            pointerId: number;
+            pressure: number;
+            tiltX: number;
+            tiltY: number;
+            width: number;
+            height: number;
+            pointerType: 'mouse' | 'pen' | 'touch';
+            isPrimary: boolean;
+            nativeEvent: NativePointerEvent;
+        }
+
+        interface FocusEvent<T = Element> extends SyntheticEvent<T> {
+            nativeEvent: NativeFocusEvent;
+            relatedTarget: EventTarget;
+            target: EventTarget & T;
+        }
+
+        // tslint:disable-next-line:no-empty-interface
+        interface FormEvent<T = Element> extends SyntheticEvent<T> {
+        }
+
+        interface InvalidEvent<T = Element> extends SyntheticEvent<T> {
+            target: EventTarget & T;
+        }
+
+        interface ChangeEvent<T = Element> extends SyntheticEvent<T> {
+            target: EventTarget & T;
+        }
+
+        interface KeyboardEvent<T = Element> extends SyntheticEvent<T> {
+            altKey: boolean;
+            charCode: number;
+            ctrlKey: boolean;
+            /**
+             * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
+             */
+            getModifierState(key: string): boolean;
+            /**
+             * See the [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#named-key-attribute-values). for possible values
+             */
+            key: string;
+            keyCode: number;
+            locale: string;
+            location: number;
+            metaKey: boolean;
+            nativeEvent: NativeKeyboardEvent;
+            repeat: boolean;
+            shiftKey: boolean;
+            which: number;
+        }
+
+        interface MouseEvent<T = Element> extends SyntheticEvent<T> {
+            altKey: boolean;
+            button: number;
+            buttons: number;
+            clientX: number;
+            clientY: number;
+            ctrlKey: boolean;
+            /**
+             * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
+             */
+            getModifierState(key: string): boolean;
+            metaKey: boolean;
+            nativeEvent: NativeMouseEvent;
+            pageX: number;
+            pageY: number;
+            relatedTarget: EventTarget;
+            screenX: number;
+            screenY: number;
+            shiftKey: boolean;
+        }
+
+        interface TouchEvent<T = Element> extends SyntheticEvent<T> {
+            altKey: boolean;
+            changedTouches: TouchList;
+            ctrlKey: boolean;
+            /**
+             * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
+             */
+            getModifierState(key: string): boolean;
+            metaKey: boolean;
+            nativeEvent: NativeTouchEvent;
+            shiftKey: boolean;
+            targetTouches: TouchList;
+            touches: TouchList;
+        }
+
+        interface UIEvent<T = Element> extends SyntheticEvent<T> {
+            detail: number;
+            nativeEvent: NativeUIEvent;
+            view: AbstractView;
+        }
+
+        interface WheelEvent<T = Element> extends MouseEvent<T> {
+            deltaMode: number;
+            deltaX: number;
+            deltaY: number;
+            deltaZ: number;
+            nativeEvent: NativeWheelEvent;
+        }
+
+        interface AnimationEvent<T = Element> extends SyntheticEvent<T> {
+            animationName: string;
+            elapsedTime: number;
+            nativeEvent: NativeAnimationEvent;
+            pseudoElement: string;
+        }
+
+        interface TransitionEvent<T = Element> extends SyntheticEvent<T> {
+            elapsedTime: number;
+            nativeEvent: NativeTransitionEvent;
+            propertyName: string;
+            pseudoElement: string;
+        }
+
+        //
+        // Event Handler Types
+        // ----------------------------------------------------------------------
+
+        type EventHandler<E extends SyntheticEvent<any>> = { bivarianceHack(event: E): void }["bivarianceHack"];
+
+        type ReactEventHandler<T = Element> = EventHandler<SyntheticEvent<T>>;
+
+        type ClipboardEventHandler<T = Element> = EventHandler<ClipboardEvent<T>>;
+        type CompositionEventHandler<T = Element> = EventHandler<CompositionEvent<T>>;
+        type DragEventHandler<T = Element> = EventHandler<DragEvent<T>>;
+        type FocusEventHandler<T = Element> = EventHandler<FocusEvent<T>>;
+        type FormEventHandler<T = Element> = EventHandler<FormEvent<T>>;
+        type ChangeEventHandler<T = Element> = EventHandler<ChangeEvent<T>>;
+        type KeyboardEventHandler<T = Element> = EventHandler<KeyboardEvent<T>>;
+        type MouseEventHandler<T = Element> = EventHandler<MouseEvent<T>>;
+        type TouchEventHandler<T = Element> = EventHandler<TouchEvent<T>>;
+        type PointerEventHandler<T = Element> = EventHandler<PointerEvent<T>>;
+        type UIEventHandler<T = Element> = EventHandler<UIEvent<T>>;
+        type WheelEventHandler<T = Element> = EventHandler<WheelEvent<T>>;
+        type AnimationEventHandler<T = Element> = EventHandler<AnimationEvent<T>>;
+        type TransitionEventHandler<T = Element> = EventHandler<TransitionEvent<T>>;
+
+        //
+        // Props / DOM Attributes
+        // ----------------------------------------------------------------------
+
+        /**
+         * @deprecated. This was used to allow clients to pass `ref` and `key`
+         * to `createElement`, which is no longer necessary due to intersection
+         * types. If you need to declare a props object before passing it to
+         * `createElement` or a factory, use `ClassAttributes<T>`:
+         *
+         * ```ts
+         * var b: Button | null;
+         * var props: ButtonProps & ClassAttributes<Button> = {
+         *     ref: b => button = b, // ok!
+         *     label: "I'm a Button"
+         * };
+         * ```
+         */
+        interface Props<T> {
+            children?: ReactNode;
+            key?: Key;
+            ref?: Ref<T>;
+        }
+
+        interface HTMLProps<T> extends AllHTMLAttributes<T>, ClassAttributes<T> {
+        }
+
+        type DetailedHTMLProps<E extends HTMLAttributes<T>, T> = ClassAttributes<T> & E;
+
+        interface SVGProps<T> extends SVGAttributes<T>, ClassAttributes<T> {
+        }
+
+        interface DOMAttributes<T> {
+            children?: ReactNode;
+            dangerouslySetInnerHTML?: {
+                __html: string;
+            };
+
+            // Clipboard Events
+            onCopy?: ClipboardEventHandler<T>;
+            onCopyCapture?: ClipboardEventHandler<T>;
+            onCut?: ClipboardEventHandler<T>;
+            onCutCapture?: ClipboardEventHandler<T>;
+            onPaste?: ClipboardEventHandler<T>;
+            onPasteCapture?: ClipboardEventHandler<T>;
+
+            // Composition Events
+            onCompositionEnd?: CompositionEventHandler<T>;
+            onCompositionEndCapture?: CompositionEventHandler<T>;
+            onCompositionStart?: CompositionEventHandler<T>;
+            onCompositionStartCapture?: CompositionEventHandler<T>;
+            onCompositionUpdate?: CompositionEventHandler<T>;
+            onCompositionUpdateCapture?: CompositionEventHandler<T>;
+
+            // Focus Events
+            onFocus?: FocusEventHandler<T>;
+            onFocusCapture?: FocusEventHandler<T>;
+            onBlur?: FocusEventHandler<T>;
+            onBlurCapture?: FocusEventHandler<T>;
+
+            // Form Events
+            onChange?: FormEventHandler<T>;
+            onChangeCapture?: FormEventHandler<T>;
+            onInput?: FormEventHandler<T>;
+            onInputCapture?: FormEventHandler<T>;
+            onReset?: FormEventHandler<T>;
+            onResetCapture?: FormEventHandler<T>;
+            onSubmit?: FormEventHandler<T>;
+            onSubmitCapture?: FormEventHandler<T>;
+            onInvalid?: FormEventHandler<T>;
+            onInvalidCapture?: FormEventHandler<T>;
+
+            // Image Events
+            onLoad?: ReactEventHandler<T>;
+            onLoadCapture?: ReactEventHandler<T>;
+            onError?: ReactEventHandler<T>; // also a Media Event
+            onErrorCapture?: ReactEventHandler<T>; // also a Media Event
+
+            // Keyboard Events
+            onKeyDown?: KeyboardEventHandler<T>;
+            onKeyDownCapture?: KeyboardEventHandler<T>;
+            onKeyPress?: KeyboardEventHandler<T>;
+            onKeyPressCapture?: KeyboardEventHandler<T>;
+            onKeyUp?: KeyboardEventHandler<T>;
+            onKeyUpCapture?: KeyboardEventHandler<T>;
+
+            // Media Events
+            onAbort?: ReactEventHandler<T>;
+            onAbortCapture?: ReactEventHandler<T>;
+            onCanPlay?: ReactEventHandler<T>;
+            onCanPlayCapture?: ReactEventHandler<T>;
+            onCanPlayThrough?: ReactEventHandler<T>;
+            onCanPlayThroughCapture?: ReactEventHandler<T>;
+            onDurationChange?: ReactEventHandler<T>;
+            onDurationChangeCapture?: ReactEventHandler<T>;
+            onEmptied?: ReactEventHandler<T>;
+            onEmptiedCapture?: ReactEventHandler<T>;
+            onEncrypted?: ReactEventHandler<T>;
+            onEncryptedCapture?: ReactEventHandler<T>;
+            onEnded?: ReactEventHandler<T>;
+            onEndedCapture?: ReactEventHandler<T>;
+            onLoadedData?: ReactEventHandler<T>;
+            onLoadedDataCapture?: ReactEventHandler<T>;
+            onLoadedMetadata?: ReactEventHandler<T>;
+            onLoadedMetadataCapture?: ReactEventHandler<T>;
+            onLoadStart?: ReactEventHandler<T>;
+            onLoadStartCapture?: ReactEventHandler<T>;
+            onPause?: ReactEventHandler<T>;
+            onPauseCapture?: ReactEventHandler<T>;
+            onPlay?: ReactEventHandler<T>;
+            onPlayCapture?: ReactEventHandler<T>;
+            onPlaying?: ReactEventHandler<T>;
+            onPlayingCapture?: ReactEventHandler<T>;
+            onProgress?: ReactEventHandler<T>;
+            onProgressCapture?: ReactEventHandler<T>;
+            onRateChange?: ReactEventHandler<T>;
+            onRateChangeCapture?: ReactEventHandler<T>;
+            onSeeked?: ReactEventHandler<T>;
+            onSeekedCapture?: ReactEventHandler<T>;
+            onSeeking?: ReactEventHandler<T>;
+            onSeekingCapture?: ReactEventHandler<T>;
+            onStalled?: ReactEventHandler<T>;
+            onStalledCapture?: ReactEventHandler<T>;
+            onSuspend?: ReactEventHandler<T>;
+            onSuspendCapture?: ReactEventHandler<T>;
+            onTimeUpdate?: ReactEventHandler<T>;
+            onTimeUpdateCapture?: ReactEventHandler<T>;
+            onVolumeChange?: ReactEventHandler<T>;
+            onVolumeChangeCapture?: ReactEventHandler<T>;
+            onWaiting?: ReactEventHandler<T>;
+            onWaitingCapture?: ReactEventHandler<T>;
+
+            // MouseEvents
+            onClick?: MouseEventHandler<T>;
+            onClickCapture?: MouseEventHandler<T>;
+            onContextMenu?: MouseEventHandler<T>;
+            onContextMenuCapture?: MouseEventHandler<T>;
+            onDoubleClick?: MouseEventHandler<T>;
+            onDoubleClickCapture?: MouseEventHandler<T>;
+            onDrag?: DragEventHandler<T>;
+            onDragCapture?: DragEventHandler<T>;
+            onDragEnd?: DragEventHandler<T>;
+            onDragEndCapture?: DragEventHandler<T>;
+            onDragEnter?: DragEventHandler<T>;
+            onDragEnterCapture?: DragEventHandler<T>;
+            onDragExit?: DragEventHandler<T>;
+            onDragExitCapture?: DragEventHandler<T>;
+            onDragLeave?: DragEventHandler<T>;
+            onDragLeaveCapture?: DragEventHandler<T>;
+            onDragOver?: DragEventHandler<T>;
+            onDragOverCapture?: DragEventHandler<T>;
+            onDragStart?: DragEventHandler<T>;
+            onDragStartCapture?: DragEventHandler<T>;
+            onDrop?: DragEventHandler<T>;
+            onDropCapture?: DragEventHandler<T>;
+            onMouseDown?: MouseEventHandler<T>;
+            onMouseDownCapture?: MouseEventHandler<T>;
+            onMouseEnter?: MouseEventHandler<T>;
+            onMouseLeave?: MouseEventHandler<T>;
+            onMouseMove?: MouseEventHandler<T>;
+            onMouseMoveCapture?: MouseEventHandler<T>;
+            onMouseOut?: MouseEventHandler<T>;
+            onMouseOutCapture?: MouseEventHandler<T>;
+            onMouseOver?: MouseEventHandler<T>;
+            onMouseOverCapture?: MouseEventHandler<T>;
+            onMouseUp?: MouseEventHandler<T>;
+            onMouseUpCapture?: MouseEventHandler<T>;
+
+            // Selection Events
+            onSelect?: ReactEventHandler<T>;
+            onSelectCapture?: ReactEventHandler<T>;
+
+            // Touch Events
+            onTouchCancel?: TouchEventHandler<T>;
+            onTouchCancelCapture?: TouchEventHandler<T>;
+            onTouchEnd?: TouchEventHandler<T>;
+            onTouchEndCapture?: TouchEventHandler<T>;
+            onTouchMove?: TouchEventHandler<T>;
+            onTouchMoveCapture?: TouchEventHandler<T>;
+            onTouchStart?: TouchEventHandler<T>;
+            onTouchStartCapture?: TouchEventHandler<T>;
+
+            // Pointer Events
+            onPointerDown?: PointerEventHandler<T>;
+            onPointerDownCapture?: PointerEventHandler<T>;
+            onPointerMove?: PointerEventHandler<T>;
+            onPointerMoveCapture?: PointerEventHandler<T>;
+            onPointerUp?: PointerEventHandler<T>;
+            onPointerUpCapture?: PointerEventHandler<T>;
+            onPointerCancel?: PointerEventHandler<T>;
+            onPointerCancelCapture?: PointerEventHandler<T>;
+            onPointerEnter?: PointerEventHandler<T>;
+            onPointerEnterCapture?: PointerEventHandler<T>;
+            onPointerLeave?: PointerEventHandler<T>;
+            onPointerLeaveCapture?: PointerEventHandler<T>;
+            onPointerOver?: PointerEventHandler<T>;
+            onPointerOverCapture?: PointerEventHandler<T>;
+            onPointerOut?: PointerEventHandler<T>;
+            onPointerOutCapture?: PointerEventHandler<T>;
+            onGotPointerCapture?: PointerEventHandler<T>;
+            onGotPointerCaptureCapture?: PointerEventHandler<T>;
+            onLostPointerCapture?: PointerEventHandler<T>;
+            onLostPointerCaptureCapture?: PointerEventHandler<T>;
+
+            // UI Events
+            onScroll?: UIEventHandler<T>;
+            onScrollCapture?: UIEventHandler<T>;
+
+            // Wheel Events
+            onWheel?: WheelEventHandler<T>;
+            onWheelCapture?: WheelEventHandler<T>;
+
+            // Animation Events
+            onAnimationStart?: AnimationEventHandler<T>;
+            onAnimationStartCapture?: AnimationEventHandler<T>;
+            onAnimationEnd?: AnimationEventHandler<T>;
+            onAnimationEndCapture?: AnimationEventHandler<T>;
+            onAnimationIteration?: AnimationEventHandler<T>;
+            onAnimationIterationCapture?: AnimationEventHandler<T>;
+
+            // Transition Events
+            onTransitionEnd?: TransitionEventHandler<T>;
+            onTransitionEndCapture?: TransitionEventHandler<T>;
+        }
+
+        export interface CSSProperties {
+            /**
+             * The index signature was removed to enable closed typing for style
+             * using CSSType. You're able to use type assertion or module augmentation
+             * to add properties or an index signature of your own.
+             *
+             * For examples and more information, visit:
+             * https://github.com/frenic/csstype#what-should-i-do-when-i-get-type-errors
+             */
+        }
+
+        interface HTMLAttributes<T> extends DOMAttributes<T> {
+            // React-specific Attributes
+            defaultChecked?: boolean;
+            defaultValue?: string | string[];
+            suppressContentEditableWarning?: boolean;
+            suppressHydrationWarning?: boolean;
+
+            // Standard HTML Attributes
+            accessKey?: string;
+            className?: string;
+            contentEditable?: boolean;
+            contextMenu?: string;
+            dir?: string;
+            draggable?: boolean;
+            hidden?: boolean;
+            id?: string;
+            lang?: string;
+            placeholder?: string;
+            slot?: string;
+            spellCheck?: boolean;
+            style?: CSSProperties;
+            tabIndex?: number;
+            title?: string;
+
+            // Unknown
+            inputMode?: string;
+            is?: string;
+            radioGroup?: string; // <command>, <menuitem>
+
+            // WAI-ARIA
+            role?: string;
+
+            // RDFa Attributes
+            about?: string;
+            datatype?: string;
+            inlist?: any;
+            prefix?: string;
+            property?: string;
+            resource?: string;
+            typeof?: string;
+            vocab?: string;
+
+            // Non-standard Attributes
+            autoCapitalize?: string;
+            autoCorrect?: string;
+            autoSave?: string;
+            color?: string;
+            itemProp?: string;
+            itemScope?: boolean;
+            itemType?: string;
+            itemID?: string;
+            itemRef?: string;
+            results?: number;
+            security?: string;
+            unselectable?: 'on' | 'off';
+        }
+
+        // All the WAI-ARIA 1.1 attributes from https://www.w3.org/TR/wai-aria-1.1/
+        interface HTMLAttributes<T> extends DOMAttributes<T> {
+            /** Identifies the currently active element when DOM focus is on a composite widget, textbox, group, or application. */
+            'aria-activedescendant'?: string;
+            /** Indicates whether assistive technologies will present all, or only parts of, the changed region based on the change notifications defined by the aria-relevant attribute. */
+            'aria-atomic'?: boolean | 'false' | 'true';
+            /**
+             * Indicates whether inputting text could trigger display of one or more predictions of the user's intended value for an input and specifies how predictions would be
+             * presented if they are made.
+             */
+            'aria-autocomplete'?: 'none' | 'inline' | 'list' | 'both';
+            /** Indicates an element is being modified and that assistive technologies MAY want to wait until the modifications are complete before exposing them to the user. */
+            'aria-busy'?: boolean | 'false' | 'true';
+            /**
+             * Indicates the current "checked" state of checkboxes, radio buttons, and other widgets.
+             * @see aria-pressed @see aria-selected.
+             */
+            'aria-checked'?: boolean | 'false' | 'mixed' | 'true';
+            /**
+             * Defines the total number of columns in a table, grid, or treegrid.
+             * @see aria-colindex.
+             */
+            'aria-colcount'?: number;
+            /**
+             * Defines an element's column index or position with respect to the total number of columns within a table, grid, or treegrid.
+             * @see aria-colcount @see aria-colspan.
+             */
+            'aria-colindex'?: number;
+            /**
+             * Defines the number of columns spanned by a cell or gridcell within a table, grid, or treegrid.
+             * @see aria-colindex @see aria-rowspan.
+             */
+            'aria-colspan'?: number;
+            /**
+             * Identifies the element (or elements) whose contents or presence are controlled by the current element.
+             * @see aria-owns.
+             */
+            'aria-controls'?: string;
+            /** Indicates the element that represents the current item within a container or set of related elements. */
+            'aria-current'?: boolean | 'false' | 'true' | 'page' | 'step' | 'location' | 'date' | 'time';
+            /**
+             * Identifies the element (or elements) that describes the object.
+             * @see aria-labelledby
+             */
+            'aria-describedby'?: string;
+            /**
+             * Identifies the element that provides a detailed, extended description for the object.
+             * @see aria-describedby.
+             */
+            'aria-details'?: string;
+            /**
+             * Indicates that the element is perceivable but disabled, so it is not editable or otherwise operable.
+             * @see aria-hidden @see aria-readonly.
+             */
+            'aria-disabled'?: boolean | 'false' | 'true';
+            /**
+             * Indicates what functions can be performed when a dragged object is released on the drop target.
+             * @deprecated in ARIA 1.1
+             */
+            'aria-dropeffect'?: 'none' | 'copy' | 'execute' | 'link' | 'move' | 'popup';
+            /**
+             * Identifies the element that provides an error message for the object.
+             * @see aria-invalid @see aria-describedby.
+             */
+            'aria-errormessage'?: string;
+            /** Indicates whether the element, or another grouping element it controls, is currently expanded or collapsed. */
+            'aria-expanded'?: boolean | 'false' | 'true';
+            /**
+             * Identifies the next element (or elements) in an alternate reading order of content which, at the user's discretion,
+             * allows assistive technology to override the general default of reading in document source order.
+             */
+            'aria-flowto'?: string;
+            /**
+             * Indicates an element's "grabbed" state in a drag-and-drop operation.
+             * @deprecated in ARIA 1.1
+             */
+            'aria-grabbed'?: boolean | 'false' | 'true';
+            /** Indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element. */
+            'aria-haspopup'?: boolean | 'false' | 'true' | 'menu' | 'listbox' | 'tree' | 'grid' | 'dialog';
+            /**
+             * Indicates whether the element is exposed to an accessibility API.
+             * @see aria-disabled.
+             */
+            'aria-hidden'?: boolean | 'false' | 'true';
+            /**
+             * Indicates the entered value does not conform to the format expected by the application.
+             * @see aria-errormessage.
+             */
+            'aria-invalid'?: boolean | 'false' | 'true' | 'grammar' | 'spelling';
+            /** Indicates keyboard shortcuts that an author has implemented to activate or give focus to an element. */
+            'aria-keyshortcuts'?: string;
+            /**
+             * Defines a string value that labels the current element.
+             * @see aria-labelledby.
+             */
+            'aria-label'?: string;
+            /**
+             * Identifies the element (or elements) that labels the current element.
+             * @see aria-describedby.
+             */
+            'aria-labelledby'?: string;
+            /** Defines the hierarchical level of an element within a structure. */
+            'aria-level'?: number;
+            /** Indicates that an element will be updated, and describes the types of updates the user agents, assistive technologies, and user can expect from the live region. */
+            'aria-live'?: 'off' | 'assertive' | 'polite';
+            /** Indicates whether an element is modal when displayed. */
+            'aria-modal'?: boolean | 'false' | 'true';
+            /** Indicates whether a text box accepts multiple lines of input or only a single line. */
+            'aria-multiline'?: boolean | 'false' | 'true';
+            /** Indicates that the user may select more than one item from the current selectable descendants. */
+            'aria-multiselectable'?: boolean | 'false' | 'true';
+            /** Indicates whether the element's orientation is horizontal, vertical, or unknown/ambiguous. */
+            'aria-orientation'?: 'horizontal' | 'vertical';
+            /**
+             * Identifies an element (or elements) in order to define a visual, functional, or contextual parent/child relationship
+             * between DOM elements where the DOM hierarchy cannot be used to represent the relationship.
+             * @see aria-controls.
+             */
+            'aria-owns'?: string;
+            /**
+             * Defines a short hint (a word or short phrase) intended to aid the user with data entry when the control has no value.
+             * A hint could be a sample value or a brief description of the expected format.
+             */
+            'aria-placeholder'?: string;
+            /**
+             * Defines an element's number or position in the current set of listitems or treeitems. Not required if all elements in the set are present in the DOM.
+             * @see aria-setsize.
+             */
+            'aria-posinset'?: number;
+            /**
+             * Indicates the current "pressed" state of toggle buttons.
+             * @see aria-checked @see aria-selected.
+             */
+            'aria-pressed'?: boolean | 'false' | 'mixed' | 'true';
+            /**
+             * Indicates that the element is not editable, but is otherwise operable.
+             * @see aria-disabled.
+             */
+            'aria-readonly'?: boolean | 'false' | 'true';
+            /**
+             * Indicates what notifications the user agent will trigger when the accessibility tree within a live region is modified.
+             * @see aria-atomic.
+             */
+            'aria-relevant'?: 'additions' | 'additions text' | 'all' | 'removals' | 'text';
+            /** Indicates that user input is required on the element before a form may be submitted. */
+            'aria-required'?: boolean | 'false' | 'true';
+            /** Defines a human-readable, author-localized description for the role of an element. */
+            'aria-roledescription'?: string;
+            /**
+             * Defines the total number of rows in a table, grid, or treegrid.
+             * @see aria-rowindex.
+             */
+            'aria-rowcount'?: number;
+            /**
+             * Defines an element's row index or position with respect to the total number of rows within a table, grid, or treegrid.
+             * @see aria-rowcount @see aria-rowspan.
+             */
+            'aria-rowindex'?: number;
+            /**
+             * Defines the number of rows spanned by a cell or gridcell within a table, grid, or treegrid.
+             * @see aria-rowindex @see aria-colspan.
+             */
+            'aria-rowspan'?: number;
+            /**
+             * Indicates the current "selected" state of various widgets.
+             * @see aria-checked @see aria-pressed.
+             */
+            'aria-selected'?: boolean | 'false' | 'true';
+            /**
+             * Defines the number of items in the current set of listitems or treeitems. Not required if all elements in the set are present in the DOM.
+             * @see aria-posinset.
+             */
+            'aria-setsize'?: number;
+            /** Indicates if items in a table or grid are sorted in ascending or descending order. */
+            'aria-sort'?: 'none' | 'ascending' | 'descending' | 'other';
+            /** Defines the maximum allowed value for a range widget. */
+            'aria-valuemax'?: number;
+            /** Defines the minimum allowed value for a range widget. */
+            'aria-valuemin'?: number;
+            /**
+             * Defines the current value for a range widget.
+             * @see aria-valuetext.
+             */
+            'aria-valuenow'?: number;
+            /** Defines the human readable text alternative of aria-valuenow for a range widget. */
+            'aria-valuetext'?: string;
+        }
+
+        interface AllHTMLAttributes<T> extends HTMLAttributes<T> {
+            // Standard HTML Attributes
+            accept?: string;
+            acceptCharset?: string;
+            action?: string;
+            allowFullScreen?: boolean;
+            allowTransparency?: boolean;
+            alt?: string;
+            as?: string;
+            async?: boolean;
+            autoComplete?: string;
+            autoFocus?: boolean;
+            autoPlay?: boolean;
+            capture?: boolean | string;
+            cellPadding?: number | string;
+            cellSpacing?: number | string;
+            charSet?: string;
+            challenge?: string;
+            checked?: boolean;
+            cite?: string;
+            classID?: string;
+            cols?: number;
+            colSpan?: number;
+            content?: string;
+            controls?: boolean;
+            coords?: string;
+            crossOrigin?: string;
+            data?: string;
+            dateTime?: string;
+            default?: boolean;
+            defer?: boolean;
+            disabled?: boolean;
+            download?: any;
+            encType?: string;
+            form?: string;
+            formAction?: string;
+            formEncType?: string;
+            formMethod?: string;
+            formNoValidate?: boolean;
+            formTarget?: string;
+            frameBorder?: number | string;
+            headers?: string;
+            height?: number | string;
+            high?: number;
+            href?: string;
+            hrefLang?: string;
+            htmlFor?: string;
+            httpEquiv?: string;
+            integrity?: string;
+            keyParams?: string;
+            keyType?: string;
+            kind?: string;
+            label?: string;
+            list?: string;
+            loop?: boolean;
+            low?: number;
+            manifest?: string;
+            marginHeight?: number;
+            marginWidth?: number;
+            max?: number | string;
+            maxLength?: number;
+            media?: string;
+            mediaGroup?: string;
+            method?: string;
+            min?: number | string;
+            minLength?: number;
+            multiple?: boolean;
+            muted?: boolean;
+            name?: string;
+            nonce?: string;
+            noValidate?: boolean;
+            open?: boolean;
+            optimum?: number;
+            pattern?: string;
+            placeholder?: string;
+            playsInline?: boolean;
+            poster?: string;
+            preload?: string;
+            readOnly?: boolean;
+            rel?: string;
+            required?: boolean;
+            reversed?: boolean;
+            rows?: number;
+            rowSpan?: number;
+            sandbox?: string;
+            scope?: string;
+            scoped?: boolean;
+            scrolling?: string;
+            seamless?: boolean;
+            selected?: boolean;
+            shape?: string;
+            size?: number;
+            sizes?: string;
+            span?: number;
+            src?: string;
+            srcDoc?: string;
+            srcLang?: string;
+            srcSet?: string;
+            start?: number;
+            step?: number | string;
+            summary?: string;
+            target?: string;
+            type?: string;
+            useMap?: string;
+            value?: string | string[] | number;
+            width?: number | string;
+            wmode?: string;
+            wrap?: string;
+        }
+
+        interface AnchorHTMLAttributes<T> extends HTMLAttributes<T> {
+            download?: any;
+            href?: string;
+            hrefLang?: string;
+            media?: string;
+            rel?: string;
+            target?: string;
+            type?: string;
+        }
+
+        // tslint:disable-next-line:no-empty-interface
+        interface AudioHTMLAttributes<T> extends MediaHTMLAttributes<T> { }
+
+        interface AreaHTMLAttributes<T> extends HTMLAttributes<T> {
+            alt?: string;
+            coords?: string;
+            download?: any;
+            href?: string;
+            hrefLang?: string;
+            media?: string;
+            rel?: string;
+            shape?: string;
+            target?: string;
+        }
+
+        interface BaseHTMLAttributes<T> extends HTMLAttributes<T> {
+            href?: string;
+            target?: string;
+        }
+
+        interface BlockquoteHTMLAttributes<T> extends HTMLAttributes<T> {
+            cite?: string;
+        }
+
+        interface ButtonHTMLAttributes<T> extends HTMLAttributes<T> {
+            autoFocus?: boolean;
+            disabled?: boolean;
+            form?: string;
+            formAction?: string;
+            formEncType?: string;
+            formMethod?: string;
+            formNoValidate?: boolean;
+            formTarget?: string;
+            name?: string;
+            type?: string;
+            value?: string | string[] | number;
+        }
+
+        interface CanvasHTMLAttributes<T> extends HTMLAttributes<T> {
+            height?: number | string;
+            width?: number | string;
+        }
+
+        interface ColHTMLAttributes<T> extends HTMLAttributes<T> {
+            span?: number;
+            width?: number | string;
+        }
+
+        interface ColgroupHTMLAttributes<T> extends HTMLAttributes<T> {
+            span?: number;
+        }
+
+        interface DetailsHTMLAttributes<T> extends HTMLAttributes<T> {
+            open?: boolean;
+        }
+
+        interface DelHTMLAttributes<T> extends HTMLAttributes<T> {
+            cite?: string;
+            dateTime?: string;
+        }
+
+        interface DialogHTMLAttributes<T> extends HTMLAttributes<T> {
+            open?: boolean;
+        }
+
+        interface EmbedHTMLAttributes<T> extends HTMLAttributes<T> {
+            height?: number | string;
+            src?: string;
+            type?: string;
+            width?: number | string;
+        }
+
+        interface FieldsetHTMLAttributes<T> extends HTMLAttributes<T> {
+            disabled?: boolean;
+            form?: string;
+            name?: string;
+        }
+
+        interface FormHTMLAttributes<T> extends HTMLAttributes<T> {
+            acceptCharset?: string;
+            action?: string;
+            autoComplete?: string;
+            encType?: string;
+            method?: string;
+            name?: string;
+            noValidate?: boolean;
+            target?: string;
+        }
+
+        interface HtmlHTMLAttributes<T> extends HTMLAttributes<T> {
+            manifest?: string;
+        }
+
+        interface IframeHTMLAttributes<T> extends HTMLAttributes<T> {
+            allow?: string;
+            allowFullScreen?: boolean;
+            allowTransparency?: boolean;
+            frameBorder?: number | string;
+            height?: number | string;
+            marginHeight?: number;
+            marginWidth?: number;
+            name?: string;
+            sandbox?: string;
+            scrolling?: string;
+            seamless?: boolean;
+            src?: string;
+            srcDoc?: string;
+            width?: number | string;
+        }
+
+        interface ImgHTMLAttributes<T> extends HTMLAttributes<T> {
+            alt?: string;
+            crossOrigin?: "anonymous" | "use-credentials" | "";
+            decoding?: "async" | "auto" | "sync";
+            height?: number | string;
+            sizes?: string;
+            src?: string;
+            srcSet?: string;
+            useMap?: string;
+            width?: number | string;
+        }
+
+        interface InsHTMLAttributes<T> extends HTMLAttributes<T> {
+            cite?: string;
+            dateTime?: string;
+        }
+
+        interface InputHTMLAttributes<T> extends HTMLAttributes<T> {
+            accept?: string;
+            alt?: string;
+            autoComplete?: string;
+            autoFocus?: boolean;
+            capture?: boolean | string; // https://www.w3.org/TR/html-media-capture/#the-capture-attribute
+            checked?: boolean;
+            crossOrigin?: string;
+            disabled?: boolean;
+            form?: string;
+            formAction?: string;
+            formEncType?: string;
+            formMethod?: string;
+            formNoValidate?: boolean;
+            formTarget?: string;
+            height?: number | string;
+            list?: string;
+            max?: number | string;
+            maxLength?: number;
+            min?: number | string;
+            minLength?: number;
+            multiple?: boolean;
+            name?: string;
+            pattern?: string;
+            placeholder?: string;
+            readOnly?: boolean;
+            required?: boolean;
+            size?: number;
+            src?: string;
+            step?: number | string;
+            type?: string;
+            value?: string | string[] | number;
+            width?: number | string;
+
+            onChange?: ChangeEventHandler<T>;
+        }
+
+        interface KeygenHTMLAttributes<T> extends HTMLAttributes<T> {
+            autoFocus?: boolean;
+            challenge?: string;
+            disabled?: boolean;
+            form?: string;
+            keyType?: string;
+            keyParams?: string;
+            name?: string;
+        }
+
+        interface LabelHTMLAttributes<T> extends HTMLAttributes<T> {
+            form?: string;
+            htmlFor?: string;
+        }
+
+        interface LiHTMLAttributes<T> extends HTMLAttributes<T> {
+            value?: string | string[] | number;
+        }
+
+        interface LinkHTMLAttributes<T> extends HTMLAttributes<T> {
+            as?: string;
+            crossOrigin?: string;
+            href?: string;
+            hrefLang?: string;
+            integrity?: string;
+            media?: string;
+            rel?: string;
+            sizes?: string;
+            type?: string;
+        }
+
+        interface MapHTMLAttributes<T> extends HTMLAttributes<T> {
+            name?: string;
+        }
+
+        interface MenuHTMLAttributes<T> extends HTMLAttributes<T> {
+            type?: string;
+        }
+
+        interface MediaHTMLAttributes<T> extends HTMLAttributes<T> {
+            autoPlay?: boolean;
+            controls?: boolean;
+            controlsList?: string;
+            crossOrigin?: string;
+            loop?: boolean;
+            mediaGroup?: string;
+            muted?: boolean;
+            playsinline?: boolean;
+            preload?: string;
+            src?: string;
+        }
+
+        interface MetaHTMLAttributes<T> extends HTMLAttributes<T> {
+            charSet?: string;
+            content?: string;
+            httpEquiv?: string;
+            name?: string;
+        }
+
+        interface MeterHTMLAttributes<T> extends HTMLAttributes<T> {
+            form?: string;
+            high?: number;
+            low?: number;
+            max?: number | string;
+            min?: number | string;
+            optimum?: number;
+            value?: string | string[] | number;
+        }
+
+        interface QuoteHTMLAttributes<T> extends HTMLAttributes<T> {
+            cite?: string;
+        }
+
+        interface ObjectHTMLAttributes<T> extends HTMLAttributes<T> {
+            classID?: string;
+            data?: string;
+            form?: string;
+            height?: number | string;
+            name?: string;
+            type?: string;
+            useMap?: string;
+            width?: number | string;
+            wmode?: string;
+        }
+
+        interface OlHTMLAttributes<T> extends HTMLAttributes<T> {
+            reversed?: boolean;
+            start?: number;
+            type?: '1' | 'a' | 'A' | 'i' | 'I';
+        }
+
+        interface OptgroupHTMLAttributes<T> extends HTMLAttributes<T> {
+            disabled?: boolean;
+            label?: string;
+        }
+
+        interface OptionHTMLAttributes<T> extends HTMLAttributes<T> {
+            disabled?: boolean;
+            label?: string;
+            selected?: boolean;
+            value?: string | string[] | number;
+        }
+
+        interface OutputHTMLAttributes<T> extends HTMLAttributes<T> {
+            form?: string;
+            htmlFor?: string;
+            name?: string;
+        }
+
+        interface ParamHTMLAttributes<T> extends HTMLAttributes<T> {
+            name?: string;
+            value?: string | string[] | number;
+        }
+
+        interface ProgressHTMLAttributes<T> extends HTMLAttributes<T> {
+            max?: number | string;
+            value?: string | string[] | number;
+        }
+
+        interface ScriptHTMLAttributes<T> extends HTMLAttributes<T> {
+            async?: boolean;
+            charSet?: string;
+            crossOrigin?: string;
+            defer?: boolean;
+            integrity?: string;
+            noModule?: boolean;
+            nonce?: string;
+            src?: string;
+            type?: string;
+        }
+
+        interface SelectHTMLAttributes<T> extends HTMLAttributes<T> {
+            autoComplete?: string;
+            autoFocus?: boolean;
+            disabled?: boolean;
+            form?: string;
+            multiple?: boolean;
+            name?: string;
+            required?: boolean;
+            size?: number;
+            value?: string | string[] | number;
+            onChange?: ChangeEventHandler<T>;
+        }
+
+        interface SourceHTMLAttributes<T> extends HTMLAttributes<T> {
+            media?: string;
+            sizes?: string;
+            src?: string;
+            srcSet?: string;
+            type?: string;
+        }
+
+        interface StyleHTMLAttributes<T> extends HTMLAttributes<T> {
+            media?: string;
+            nonce?: string;
+            scoped?: boolean;
+            type?: string;
+        }
+
+        interface TableHTMLAttributes<T> extends HTMLAttributes<T> {
+            cellPadding?: number | string;
+            cellSpacing?: number | string;
+            summary?: string;
+        }
+
+        interface TextareaHTMLAttributes<T> extends HTMLAttributes<T> {
+            autoComplete?: string;
+            autoFocus?: boolean;
+            cols?: number;
+            dirName?: string;
+            disabled?: boolean;
+            form?: string;
+            maxLength?: number;
+            minLength?: number;
+            name?: string;
+            placeholder?: string;
+            readOnly?: boolean;
+            required?: boolean;
+            rows?: number;
+            value?: string | string[] | number;
+            wrap?: string;
+
+            onChange?: ChangeEventHandler<T>;
+        }
+
+        interface TdHTMLAttributes<T> extends HTMLAttributes<T> {
+            colSpan?: number;
+            headers?: string;
+            rowSpan?: number;
+            scope?: string;
+        }
+
+        interface ThHTMLAttributes<T> extends HTMLAttributes<T> {
+            colSpan?: number;
+            headers?: string;
+            rowSpan?: number;
+            scope?: string;
+        }
+
+        interface TimeHTMLAttributes<T> extends HTMLAttributes<T> {
+            dateTime?: string;
+        }
+
+        interface TrackHTMLAttributes<T> extends HTMLAttributes<T> {
+            default?: boolean;
+            kind?: string;
+            label?: string;
+            src?: string;
+            srcLang?: string;
+        }
+
+        interface VideoHTMLAttributes<T> extends MediaHTMLAttributes<T> {
+            height?: number | string;
+            playsInline?: boolean;
+            poster?: string;
+            width?: number | string;
+        }
+
+        // this list is "complete" in that it contains every SVG attribute
+        // that React supports, but the types can be improved.
+        // Full list here: https://facebook.github.io/react/docs/dom-elements.html
+        //
+        // The three broad type categories are (in order of restrictiveness):
+        //   - "number | string"
+        //   - "string"
+        //   - union of string literals
+        interface SVGAttributes<T> extends DOMAttributes<T> {
+            // Attributes which also defined in HTMLAttributes
+            // See comment in SVGDOMPropertyConfig.js
+            className?: string;
+            color?: string;
+            height?: number | string;
+            id?: string;
+            lang?: string;
+            max?: number | string;
+            media?: string;
+            method?: string;
+            min?: number | string;
+            name?: string;
+            style?: CSSProperties;
+            target?: string;
+            type?: string;
+            width?: number | string;
+
+            // Other HTML properties supported by SVG elements in browsers
+            role?: string;
+            tabIndex?: number;
+
+            // SVG Specific attributes
+            accentHeight?: number | string;
+            accumulate?: "none" | "sum";
+            additive?: "replace" | "sum";
+            alignmentBaseline?: "auto" | "baseline" | "before-edge" | "text-before-edge" | "middle" | "central" | "after-edge" |
+            "text-after-edge" | "ideographic" | "alphabetic" | "hanging" | "mathematical" | "inherit";
+            allowReorder?: "no" | "yes";
+            alphabetic?: number | string;
+            amplitude?: number | string;
+            arabicForm?: "initial" | "medial" | "terminal" | "isolated";
+            ascent?: number | string;
+            attributeName?: string;
+            attributeType?: string;
+            autoReverse?: number | string;
+            azimuth?: number | string;
+            baseFrequency?: number | string;
+            baselineShift?: number | string;
+            baseProfile?: number | string;
+            bbox?: number | string;
+            begin?: number | string;
+            bias?: number | string;
+            by?: number | string;
+            calcMode?: number | string;
+            capHeight?: number | string;
+            clip?: number | string;
+            clipPath?: string;
+            clipPathUnits?: number | string;
+            clipRule?: number | string;
+            colorInterpolation?: number | string;
+            colorInterpolationFilters?: "auto" | "sRGB" | "linearRGB" | "inherit";
+            colorProfile?: number | string;
+            colorRendering?: number | string;
+            contentScriptType?: number | string;
+            contentStyleType?: number | string;
+            cursor?: number | string;
+            cx?: number | string;
+            cy?: number | string;
+            d?: string;
+            decelerate?: number | string;
+            descent?: number | string;
+            diffuseConstant?: number | string;
+            direction?: number | string;
+            display?: number | string;
+            divisor?: number | string;
+            dominantBaseline?: number | string;
+            dur?: number | string;
+            dx?: number | string;
+            dy?: number | string;
+            edgeMode?: number | string;
+            elevation?: number | string;
+            enableBackground?: number | string;
+            end?: number | string;
+            exponent?: number | string;
+            externalResourcesRequired?: number | string;
+            fill?: string;
+            fillOpacity?: number | string;
+            fillRule?: "nonzero" | "evenodd" | "inherit";
+            filter?: string;
+            filterRes?: number | string;
+            filterUnits?: number | string;
+            floodColor?: number | string;
+            floodOpacity?: number | string;
+            focusable?: number | string;
+            fontFamily?: string;
+            fontSize?: number | string;
+            fontSizeAdjust?: number | string;
+            fontStretch?: number | string;
+            fontStyle?: number | string;
+            fontVariant?: number | string;
+            fontWeight?: number | string;
+            format?: number | string;
+            from?: number | string;
+            fx?: number | string;
+            fy?: number | string;
+            g1?: number | string;
+            g2?: number | string;
+            glyphName?: number | string;
+            glyphOrientationHorizontal?: number | string;
+            glyphOrientationVertical?: number | string;
+            glyphRef?: number | string;
+            gradientTransform?: string;
+            gradientUnits?: string;
+            hanging?: number | string;
+            horizAdvX?: number | string;
+            horizOriginX?: number | string;
+            href?: string;
+            ideographic?: number | string;
+            imageRendering?: number | string;
+            in2?: number | string;
+            in?: string;
+            intercept?: number | string;
+            k1?: number | string;
+            k2?: number | string;
+            k3?: number | string;
+            k4?: number | string;
+            k?: number | string;
+            kernelMatrix?: number | string;
+            kernelUnitLength?: number | string;
+            kerning?: number | string;
+            keyPoints?: number | string;
+            keySplines?: number | string;
+            keyTimes?: number | string;
+            lengthAdjust?: number | string;
+            letterSpacing?: number | string;
+            lightingColor?: number | string;
+            limitingConeAngle?: number | string;
+            local?: number | string;
+            markerEnd?: string;
+            markerHeight?: number | string;
+            markerMid?: string;
+            markerStart?: string;
+            markerUnits?: number | string;
+            markerWidth?: number | string;
+            mask?: string;
+            maskContentUnits?: number | string;
+            maskUnits?: number | string;
+            mathematical?: number | string;
+            mode?: number | string;
+            numOctaves?: number | string;
+            offset?: number | string;
+            opacity?: number | string;
+            operator?: number | string;
+            order?: number | string;
+            orient?: number | string;
+            orientation?: number | string;
+            origin?: number | string;
+            overflow?: number | string;
+            overlinePosition?: number | string;
+            overlineThickness?: number | string;
+            paintOrder?: number | string;
+            panose1?: number | string;
+            pathLength?: number | string;
+            patternContentUnits?: string;
+            patternTransform?: number | string;
+            patternUnits?: string;
+            pointerEvents?: number | string;
+            points?: string;
+            pointsAtX?: number | string;
+            pointsAtY?: number | string;
+            pointsAtZ?: number | string;
+            preserveAlpha?: number | string;
+            preserveAspectRatio?: string;
+            primitiveUnits?: number | string;
+            r?: number | string;
+            radius?: number | string;
+            refX?: number | string;
+            refY?: number | string;
+            renderingIntent?: number | string;
+            repeatCount?: number | string;
+            repeatDur?: number | string;
+            requiredExtensions?: number | string;
+            requiredFeatures?: number | string;
+            restart?: number | string;
+            result?: string;
+            rotate?: number | string;
+            rx?: number | string;
+            ry?: number | string;
+            scale?: number | string;
+            seed?: number | string;
+            shapeRendering?: number | string;
+            slope?: number | string;
+            spacing?: number | string;
+            specularConstant?: number | string;
+            specularExponent?: number | string;
+            speed?: number | string;
+            spreadMethod?: string;
+            startOffset?: number | string;
+            stdDeviation?: number | string;
+            stemh?: number | string;
+            stemv?: number | string;
+            stitchTiles?: number | string;
+            stopColor?: string;
+            stopOpacity?: number | string;
+            strikethroughPosition?: number | string;
+            strikethroughThickness?: number | string;
+            string?: number | string;
+            stroke?: string;
+            strokeDasharray?: string | number;
+            strokeDashoffset?: string | number;
+            strokeLinecap?: "butt" | "round" | "square" | "inherit";
+            strokeLinejoin?: "miter" | "round" | "bevel" | "inherit";
+            strokeMiterlimit?: number | string;
+            strokeOpacity?: number | string;
+            strokeWidth?: number | string;
+            surfaceScale?: number | string;
+            systemLanguage?: number | string;
+            tableValues?: number | string;
+            targetX?: number | string;
+            targetY?: number | string;
+            textAnchor?: string;
+            textDecoration?: number | string;
+            textLength?: number | string;
+            textRendering?: number | string;
+            to?: number | string;
+            transform?: string;
+            u1?: number | string;
+            u2?: number | string;
+            underlinePosition?: number | string;
+            underlineThickness?: number | string;
+            unicode?: number | string;
+            unicodeBidi?: number | string;
+            unicodeRange?: number | string;
+            unitsPerEm?: number | string;
+            vAlphabetic?: number | string;
+            values?: string;
+            vectorEffect?: number | string;
+            version?: string;
+            vertAdvY?: number | string;
+            vertOriginX?: number | string;
+            vertOriginY?: number | string;
+            vHanging?: number | string;
+            vIdeographic?: number | string;
+            viewBox?: string;
+            viewTarget?: number | string;
+            visibility?: number | string;
+            vMathematical?: number | string;
+            widths?: number | string;
+            wordSpacing?: number | string;
+            writingMode?: number | string;
+            x1?: number | string;
+            x2?: number | string;
+            x?: number | string;
+            xChannelSelector?: string;
+            xHeight?: number | string;
+            xlinkActuate?: string;
+            xlinkArcrole?: string;
+            xlinkHref?: string;
+            xlinkRole?: string;
+            xlinkShow?: string;
+            xlinkTitle?: string;
+            xlinkType?: string;
+            xmlBase?: string;
+            xmlLang?: string;
+            xmlns?: string;
+            xmlnsXlink?: string;
+            xmlSpace?: string;
+            y1?: number | string;
+            y2?: number | string;
+            y?: number | string;
+            yChannelSelector?: string;
+            z?: number | string;
+            zoomAndPan?: string;
+        }
+
+        interface WebViewHTMLAttributes<T> extends HTMLAttributes<T> {
+            allowFullScreen?: boolean;
+            allowpopups?: boolean;
+            autoFocus?: boolean;
+            autosize?: boolean;
+            blinkfeatures?: string;
+            disableblinkfeatures?: string;
+            disableguestresize?: boolean;
+            disablewebsecurity?: boolean;
+            guestinstance?: string;
+            httpreferrer?: string;
+            nodeintegration?: boolean;
+            partition?: string;
+            plugins?: boolean;
+            preload?: string;
+            src?: string;
+            useragent?: string;
+            webpreferences?: string;
+        }
+
+        //
+        // React.DOM
+        // ----------------------------------------------------------------------
+
+        interface ReactHTML {
+            a: DetailedHTMLFactory<AnchorHTMLAttributes<HTMLAnchorElement>, HTMLAnchorElement>;
+            abbr: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            address: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            area: DetailedHTMLFactory<AreaHTMLAttributes<HTMLAreaElement>, HTMLAreaElement>;
+            article: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            aside: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            audio: DetailedHTMLFactory<AudioHTMLAttributes<HTMLAudioElement>, HTMLAudioElement>;
+            b: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            base: DetailedHTMLFactory<BaseHTMLAttributes<HTMLBaseElement>, HTMLBaseElement>;
+            bdi: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            bdo: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            big: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            blockquote: DetailedHTMLFactory<BlockquoteHTMLAttributes<HTMLElement>, HTMLElement>;
+            body: DetailedHTMLFactory<HTMLAttributes<HTMLBodyElement>, HTMLBodyElement>;
+            br: DetailedHTMLFactory<HTMLAttributes<HTMLBRElement>, HTMLBRElement>;
+            button: DetailedHTMLFactory<ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>;
+            canvas: DetailedHTMLFactory<CanvasHTMLAttributes<HTMLCanvasElement>, HTMLCanvasElement>;
+            caption: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            cite: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            code: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            col: DetailedHTMLFactory<ColHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
+            colgroup: DetailedHTMLFactory<ColgroupHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
+            data: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            datalist: DetailedHTMLFactory<HTMLAttributes<HTMLDataListElement>, HTMLDataListElement>;
+            dd: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            del: DetailedHTMLFactory<DelHTMLAttributes<HTMLElement>, HTMLElement>;
+            details: DetailedHTMLFactory<DetailsHTMLAttributes<HTMLElement>, HTMLElement>;
+            dfn: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            dialog: DetailedHTMLFactory<DialogHTMLAttributes<HTMLDialogElement>, HTMLDialogElement>;
+            div: DetailedHTMLFactory<HTMLAttributes<HTMLDivElement>, HTMLDivElement>;
+            dl: DetailedHTMLFactory<HTMLAttributes<HTMLDListElement>, HTMLDListElement>;
+            dt: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            em: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            embed: DetailedHTMLFactory<EmbedHTMLAttributes<HTMLEmbedElement>, HTMLEmbedElement>;
+            fieldset: DetailedHTMLFactory<FieldsetHTMLAttributes<HTMLFieldSetElement>, HTMLFieldSetElement>;
+            figcaption: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            figure: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            footer: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            form: DetailedHTMLFactory<FormHTMLAttributes<HTMLFormElement>, HTMLFormElement>;
+            h1: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+            h2: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+            h3: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+            h4: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+            h5: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+            h6: DetailedHTMLFactory<HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+            head: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLHeadElement>;
+            header: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            hgroup: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            hr: DetailedHTMLFactory<HTMLAttributes<HTMLHRElement>, HTMLHRElement>;
+            html: DetailedHTMLFactory<HtmlHTMLAttributes<HTMLHtmlElement>, HTMLHtmlElement>;
+            i: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            iframe: DetailedHTMLFactory<IframeHTMLAttributes<HTMLIFrameElement>, HTMLIFrameElement>;
+            img: DetailedHTMLFactory<ImgHTMLAttributes<HTMLImageElement>, HTMLImageElement>;
+            input: DetailedHTMLFactory<InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>;
+            ins: DetailedHTMLFactory<InsHTMLAttributes<HTMLModElement>, HTMLModElement>;
+            kbd: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            keygen: DetailedHTMLFactory<KeygenHTMLAttributes<HTMLElement>, HTMLElement>;
+            label: DetailedHTMLFactory<LabelHTMLAttributes<HTMLLabelElement>, HTMLLabelElement>;
+            legend: DetailedHTMLFactory<HTMLAttributes<HTMLLegendElement>, HTMLLegendElement>;
+            li: DetailedHTMLFactory<LiHTMLAttributes<HTMLLIElement>, HTMLLIElement>;
+            link: DetailedHTMLFactory<LinkHTMLAttributes<HTMLLinkElement>, HTMLLinkElement>;
+            main: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            map: DetailedHTMLFactory<MapHTMLAttributes<HTMLMapElement>, HTMLMapElement>;
+            mark: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            menu: DetailedHTMLFactory<MenuHTMLAttributes<HTMLElement>, HTMLElement>;
+            menuitem: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            meta: DetailedHTMLFactory<MetaHTMLAttributes<HTMLMetaElement>, HTMLMetaElement>;
+            meter: DetailedHTMLFactory<MeterHTMLAttributes<HTMLElement>, HTMLElement>;
+            nav: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            noscript: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            object: DetailedHTMLFactory<ObjectHTMLAttributes<HTMLObjectElement>, HTMLObjectElement>;
+            ol: DetailedHTMLFactory<OlHTMLAttributes<HTMLOListElement>, HTMLOListElement>;
+            optgroup: DetailedHTMLFactory<OptgroupHTMLAttributes<HTMLOptGroupElement>, HTMLOptGroupElement>;
+            option: DetailedHTMLFactory<OptionHTMLAttributes<HTMLOptionElement>, HTMLOptionElement>;
+            output: DetailedHTMLFactory<OutputHTMLAttributes<HTMLElement>, HTMLElement>;
+            p: DetailedHTMLFactory<HTMLAttributes<HTMLParagraphElement>, HTMLParagraphElement>;
+            param: DetailedHTMLFactory<ParamHTMLAttributes<HTMLParamElement>, HTMLParamElement>;
+            picture: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            pre: DetailedHTMLFactory<HTMLAttributes<HTMLPreElement>, HTMLPreElement>;
+            progress: DetailedHTMLFactory<ProgressHTMLAttributes<HTMLProgressElement>, HTMLProgressElement>;
+            q: DetailedHTMLFactory<QuoteHTMLAttributes<HTMLQuoteElement>, HTMLQuoteElement>;
+            rp: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            rt: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            ruby: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            s: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            samp: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            script: DetailedHTMLFactory<ScriptHTMLAttributes<HTMLScriptElement>, HTMLScriptElement>;
+            section: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            select: DetailedHTMLFactory<SelectHTMLAttributes<HTMLSelectElement>, HTMLSelectElement>;
+            small: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            source: DetailedHTMLFactory<SourceHTMLAttributes<HTMLSourceElement>, HTMLSourceElement>;
+            span: DetailedHTMLFactory<HTMLAttributes<HTMLSpanElement>, HTMLSpanElement>;
+            strong: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            style: DetailedHTMLFactory<StyleHTMLAttributes<HTMLStyleElement>, HTMLStyleElement>;
+            sub: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            summary: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            sup: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            table: DetailedHTMLFactory<TableHTMLAttributes<HTMLTableElement>, HTMLTableElement>;
+            tbody: DetailedHTMLFactory<HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
+            td: DetailedHTMLFactory<TdHTMLAttributes<HTMLTableDataCellElement>, HTMLTableDataCellElement>;
+            textarea: DetailedHTMLFactory<TextareaHTMLAttributes<HTMLTextAreaElement>, HTMLTextAreaElement>;
+            tfoot: DetailedHTMLFactory<HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
+            th: DetailedHTMLFactory<ThHTMLAttributes<HTMLTableHeaderCellElement>, HTMLTableHeaderCellElement>;
+            thead: DetailedHTMLFactory<HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
+            time: DetailedHTMLFactory<TimeHTMLAttributes<HTMLElement>, HTMLElement>;
+            title: DetailedHTMLFactory<HTMLAttributes<HTMLTitleElement>, HTMLTitleElement>;
+            tr: DetailedHTMLFactory<HTMLAttributes<HTMLTableRowElement>, HTMLTableRowElement>;
+            track: DetailedHTMLFactory<TrackHTMLAttributes<HTMLTrackElement>, HTMLTrackElement>;
+            u: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            ul: DetailedHTMLFactory<HTMLAttributes<HTMLUListElement>, HTMLUListElement>;
+            "var": DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            video: DetailedHTMLFactory<VideoHTMLAttributes<HTMLVideoElement>, HTMLVideoElement>;
+            wbr: DetailedHTMLFactory<HTMLAttributes<HTMLElement>, HTMLElement>;
+            webview: DetailedHTMLFactory<WebViewHTMLAttributes<HTMLWebViewElement>, HTMLWebViewElement>;
+        }
+
+        interface ReactSVG {
+            animate: SVGFactory;
+            circle: SVGFactory;
+            clipPath: SVGFactory;
+            defs: SVGFactory;
+            desc: SVGFactory;
+            ellipse: SVGFactory;
+            feBlend: SVGFactory;
+            feColorMatrix: SVGFactory;
+            feComponentTransfer: SVGFactory;
+            feComposite: SVGFactory;
+            feConvolveMatrix: SVGFactory;
+            feDiffuseLighting: SVGFactory;
+            feDisplacementMap: SVGFactory;
+            feDistantLight: SVGFactory;
+            feDropShadow: SVGFactory;
+            feFlood: SVGFactory;
+            feFuncA: SVGFactory;
+            feFuncB: SVGFactory;
+            feFuncG: SVGFactory;
+            feFuncR: SVGFactory;
+            feGaussianBlur: SVGFactory;
+            feImage: SVGFactory;
+            feMerge: SVGFactory;
+            feMergeNode: SVGFactory;
+            feMorphology: SVGFactory;
+            feOffset: SVGFactory;
+            fePointLight: SVGFactory;
+            feSpecularLighting: SVGFactory;
+            feSpotLight: SVGFactory;
+            feTile: SVGFactory;
+            feTurbulence: SVGFactory;
+            filter: SVGFactory;
+            foreignObject: SVGFactory;
+            g: SVGFactory;
+            image: SVGFactory;
+            line: SVGFactory;
+            linearGradient: SVGFactory;
+            marker: SVGFactory;
+            mask: SVGFactory;
+            metadata: SVGFactory;
+            path: SVGFactory;
+            pattern: SVGFactory;
+            polygon: SVGFactory;
+            polyline: SVGFactory;
+            radialGradient: SVGFactory;
+            rect: SVGFactory;
+            stop: SVGFactory;
+            svg: SVGFactory;
+            switch: SVGFactory;
+            symbol: SVGFactory;
+            text: SVGFactory;
+            textPath: SVGFactory;
+            tspan: SVGFactory;
+            use: SVGFactory;
+            view: SVGFactory;
+        }
+
+        interface ReactDOM extends ReactHTML, ReactSVG { }
+
+        //
+        // React.PropTypes
+        // ----------------------------------------------------------------------
+
+        type Validator<T> = PropTypes.Validator<T>;
+
+        type Requireable<T> = PropTypes.Requireable<T>;
+
+        type ValidationMap<T> = PropTypes.ValidationMap<T>;
+
+        interface ReactPropTypes {
+            any: typeof PropTypes.any;
+            array: typeof PropTypes.array;
+            bool: typeof PropTypes.bool;
+            func: typeof PropTypes.func;
+            number: typeof PropTypes.number;
+            object: typeof PropTypes.object;
+            string: typeof PropTypes.string;
+            node: typeof PropTypes.node;
+            element: typeof PropTypes.element;
+            instanceOf: typeof PropTypes.instanceOf;
+            oneOf: typeof PropTypes.oneOf;
+            oneOfType: typeof PropTypes.oneOfType;
+            arrayOf: typeof PropTypes.arrayOf;
+            objectOf: typeof PropTypes.objectOf;
+            shape: typeof PropTypes.shape;
+            exact: typeof PropTypes.exact;
+        }
+
+        //
+        // React.Children
+        // ----------------------------------------------------------------------
+
+        interface ReactChildren {
+            map<T>(children: ReactNode, fn: (child: ReactChild, index: number) => T): T[];
+            forEach(children: ReactNode, fn: (child: ReactChild, index: number) => void): void;
+            count(children: ReactNode): number;
+            only(children: ReactNode): ReactElement<any>;
+            toArray(children: ReactNode): ReactChild[];
+        }
+
+        //
+        // Browser Interfaces
+        // https://github.com/nikeee/2048-typescript/blob/master/2048/js/touch.d.ts
+        // ----------------------------------------------------------------------
+
+        interface AbstractView {
+            styleMedia: StyleMedia;
+            document: Document;
+        }
+
+        interface Touch {
+            identifier: number;
+            target: EventTarget;
+            screenX: number;
+            screenY: number;
+            clientX: number;
+            clientY: number;
+            pageX: number;
+            pageY: number;
+        }
+
+        interface TouchList {
+            [index: number]: Touch;
+            length: number;
+            item(index: number): Touch;
+            identifiedTouch(identifier: number): Touch;
+        }
+
+        //
+        // Error Interfaces
+        // ----------------------------------------------------------------------
+        interface ErrorInfo {
+            /**
+             * Captures which component contained the exception, and its ancestors.
+             */
+            componentStack: string;
+        }
+    }
+
+    // Declared props take priority over inferred props
+    // If declared props have indexed properties, ignore inferred props entirely as keyof gets widened
+    type MergePropTypes<P, T> = P & Pick<T, Exclude<keyof T, keyof P>>;
+
+    // Any prop that has a default prop becomes optional, but its type is unchanged
+    // Undeclared default props are augmented into the resulting allowable attributes
+    // If declared props have indexed properties, ignore default props entirely as keyof gets widened
+    // Wrap in an outer-level conditional type to allow distribution over props that are unions
+    type Defaultize<P, D> = P extends any
+        ? string extends keyof P ? P :
+        & Pick<P, Exclude<keyof P, keyof D>>
+        & Partial<Pick<P, Extract<keyof P, keyof D>>>
+        & Partial<Pick<D, Exclude<keyof D, keyof P>>>
+        : never;
+
+    global {
+        namespace JSX {
+            // tslint:disable-next-line:no-empty-interface
+            interface Element extends React.ReactElement<any> { }
+            interface ElementClass extends React.Component<any> {
+                render(): React.ReactNode;
+            }
+            interface ElementAttributesProperty { props: {}; }
+            interface ElementChildrenAttribute { children: {}; }
+
+            type LibraryManagedAttributes<C, P> = C extends { propTypes: infer T; defaultProps: infer D; }
+                ? Defaultize<MergePropTypes<P, PropTypes.InferProps<T>>, D>
+                : C extends { propTypes: infer T; }
+                ? MergePropTypes<P, PropTypes.InferProps<T>>
+                : C extends { defaultProps: infer D; }
+                ? Defaultize<P, D>
+                : P;
+
+            // tslint:disable-next-line:no-empty-interface
+            interface IntrinsicAttributes extends React.Attributes { }
+            // tslint:disable-next-line:no-empty-interface
+            interface IntrinsicClassAttributes<T> extends React.ClassAttributes<T> { }
+
+            interface IntrinsicElements {
+                // HTML
+                a: React.DetailedHTMLProps<React.AnchorHTMLAttributes<HTMLAnchorElement>, HTMLAnchorElement>;
+                abbr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                address: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                area: React.DetailedHTMLProps<React.AreaHTMLAttributes<HTMLAreaElement>, HTMLAreaElement>;
+                article: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                aside: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                audio: React.DetailedHTMLProps<React.AudioHTMLAttributes<HTMLAudioElement>, HTMLAudioElement>;
+                b: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                base: React.DetailedHTMLProps<React.BaseHTMLAttributes<HTMLBaseElement>, HTMLBaseElement>;
+                bdi: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                bdo: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                big: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                blockquote: React.DetailedHTMLProps<React.BlockquoteHTMLAttributes<HTMLElement>, HTMLElement>;
+                body: React.DetailedHTMLProps<React.HTMLAttributes<HTMLBodyElement>, HTMLBodyElement>;
+                br: React.DetailedHTMLProps<React.HTMLAttributes<HTMLBRElement>, HTMLBRElement>;
+                button: React.DetailedHTMLProps<React.ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>;
+                canvas: React.DetailedHTMLProps<React.CanvasHTMLAttributes<HTMLCanvasElement>, HTMLCanvasElement>;
+                caption: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                cite: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                code: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                col: React.DetailedHTMLProps<React.ColHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
+                colgroup: React.DetailedHTMLProps<React.ColgroupHTMLAttributes<HTMLTableColElement>, HTMLTableColElement>;
+                data: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                datalist: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDataListElement>, HTMLDataListElement>;
+                dd: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                del: React.DetailedHTMLProps<React.DelHTMLAttributes<HTMLElement>, HTMLElement>;
+                details: React.DetailedHTMLProps<React.DetailsHTMLAttributes<HTMLElement>, HTMLElement>;
+                dfn: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                dialog: React.DetailedHTMLProps<React.DialogHTMLAttributes<HTMLDialogElement>, HTMLDialogElement>;
+                div: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDivElement>, HTMLDivElement>;
+                dl: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDListElement>, HTMLDListElement>;
+                dt: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                em: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                embed: React.DetailedHTMLProps<React.EmbedHTMLAttributes<HTMLEmbedElement>, HTMLEmbedElement>;
+                fieldset: React.DetailedHTMLProps<React.FieldsetHTMLAttributes<HTMLFieldSetElement>, HTMLFieldSetElement>;
+                figcaption: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                figure: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                footer: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                form: React.DetailedHTMLProps<React.FormHTMLAttributes<HTMLFormElement>, HTMLFormElement>;
+                h1: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+                h2: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+                h3: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+                h4: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+                h5: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+                h6: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadingElement>, HTMLHeadingElement>;
+                head: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHeadElement>, HTMLHeadElement>;
+                header: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                hgroup: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                hr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLHRElement>, HTMLHRElement>;
+                html: React.DetailedHTMLProps<React.HtmlHTMLAttributes<HTMLHtmlElement>, HTMLHtmlElement>;
+                i: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                iframe: React.DetailedHTMLProps<React.IframeHTMLAttributes<HTMLIFrameElement>, HTMLIFrameElement>;
+                img: React.DetailedHTMLProps<React.ImgHTMLAttributes<HTMLImageElement>, HTMLImageElement>;
+                input: React.DetailedHTMLProps<React.InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>;
+                ins: React.DetailedHTMLProps<React.InsHTMLAttributes<HTMLModElement>, HTMLModElement>;
+                kbd: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                keygen: React.DetailedHTMLProps<React.KeygenHTMLAttributes<HTMLElement>, HTMLElement>;
+                label: React.DetailedHTMLProps<React.LabelHTMLAttributes<HTMLLabelElement>, HTMLLabelElement>;
+                legend: React.DetailedHTMLProps<React.HTMLAttributes<HTMLLegendElement>, HTMLLegendElement>;
+                li: React.DetailedHTMLProps<React.LiHTMLAttributes<HTMLLIElement>, HTMLLIElement>;
+                link: React.DetailedHTMLProps<React.LinkHTMLAttributes<HTMLLinkElement>, HTMLLinkElement>;
+                main: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                map: React.DetailedHTMLProps<React.MapHTMLAttributes<HTMLMapElement>, HTMLMapElement>;
+                mark: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                menu: React.DetailedHTMLProps<React.MenuHTMLAttributes<HTMLElement>, HTMLElement>;
+                menuitem: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                meta: React.DetailedHTMLProps<React.MetaHTMLAttributes<HTMLMetaElement>, HTMLMetaElement>;
+                meter: React.DetailedHTMLProps<React.MeterHTMLAttributes<HTMLElement>, HTMLElement>;
+                nav: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                noindex: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                noscript: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                object: React.DetailedHTMLProps<React.ObjectHTMLAttributes<HTMLObjectElement>, HTMLObjectElement>;
+                ol: React.DetailedHTMLProps<React.OlHTMLAttributes<HTMLOListElement>, HTMLOListElement>;
+                optgroup: React.DetailedHTMLProps<React.OptgroupHTMLAttributes<HTMLOptGroupElement>, HTMLOptGroupElement>;
+                option: React.DetailedHTMLProps<React.OptionHTMLAttributes<HTMLOptionElement>, HTMLOptionElement>;
+                output: React.DetailedHTMLProps<React.OutputHTMLAttributes<HTMLElement>, HTMLElement>;
+                p: React.DetailedHTMLProps<React.HTMLAttributes<HTMLParagraphElement>, HTMLParagraphElement>;
+                param: React.DetailedHTMLProps<React.ParamHTMLAttributes<HTMLParamElement>, HTMLParamElement>;
+                picture: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                pre: React.DetailedHTMLProps<React.HTMLAttributes<HTMLPreElement>, HTMLPreElement>;
+                progress: React.DetailedHTMLProps<React.ProgressHTMLAttributes<HTMLProgressElement>, HTMLProgressElement>;
+                q: React.DetailedHTMLProps<React.QuoteHTMLAttributes<HTMLQuoteElement>, HTMLQuoteElement>;
+                rp: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                rt: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                ruby: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                s: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                samp: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                script: React.DetailedHTMLProps<React.ScriptHTMLAttributes<HTMLScriptElement>, HTMLScriptElement>;
+                section: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                select: React.DetailedHTMLProps<React.SelectHTMLAttributes<HTMLSelectElement>, HTMLSelectElement>;
+                small: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                source: React.DetailedHTMLProps<React.SourceHTMLAttributes<HTMLSourceElement>, HTMLSourceElement>;
+                span: React.DetailedHTMLProps<React.HTMLAttributes<HTMLSpanElement>, HTMLSpanElement>;
+                strong: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                style: React.DetailedHTMLProps<React.StyleHTMLAttributes<HTMLStyleElement>, HTMLStyleElement>;
+                sub: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                summary: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                sup: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                table: React.DetailedHTMLProps<React.TableHTMLAttributes<HTMLTableElement>, HTMLTableElement>;
+                tbody: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
+                td: React.DetailedHTMLProps<React.TdHTMLAttributes<HTMLTableDataCellElement>, HTMLTableDataCellElement>;
+                textarea: React.DetailedHTMLProps<React.TextareaHTMLAttributes<HTMLTextAreaElement>, HTMLTextAreaElement>;
+                tfoot: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
+                th: React.DetailedHTMLProps<React.ThHTMLAttributes<HTMLTableHeaderCellElement>, HTMLTableHeaderCellElement>;
+                thead: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableSectionElement>, HTMLTableSectionElement>;
+                time: React.DetailedHTMLProps<React.TimeHTMLAttributes<HTMLElement>, HTMLElement>;
+                title: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTitleElement>, HTMLTitleElement>;
+                tr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLTableRowElement>, HTMLTableRowElement>;
+                track: React.DetailedHTMLProps<React.TrackHTMLAttributes<HTMLTrackElement>, HTMLTrackElement>;
+                u: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                ul: React.DetailedHTMLProps<React.HTMLAttributes<HTMLUListElement>, HTMLUListElement>;
+                "var": React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                video: React.DetailedHTMLProps<React.VideoHTMLAttributes<HTMLVideoElement>, HTMLVideoElement>;
+                wbr: React.DetailedHTMLProps<React.HTMLAttributes<HTMLElement>, HTMLElement>;
+                webview: React.DetailedHTMLProps<React.WebViewHTMLAttributes<HTMLWebViewElement>, HTMLWebViewElement>;
+
+                // SVG
+                svg: React.SVGProps<SVGSVGElement>;
+
+                animate: React.SVGProps<SVGElement>; // TODO: It is SVGAnimateElement but is not in TypeScript's lib.dom.d.ts for now.
+                animateTransform: React.SVGProps<SVGElement>; // TODO: It is SVGAnimateTransformElement but is not in TypeScript's lib.dom.d.ts for now.
+                circle: React.SVGProps<SVGCircleElement>;
+                clipPath: React.SVGProps<SVGClipPathElement>;
+                defs: React.SVGProps<SVGDefsElement>;
+                desc: React.SVGProps<SVGDescElement>;
+                ellipse: React.SVGProps<SVGEllipseElement>;
+                feBlend: React.SVGProps<SVGFEBlendElement>;
+                feColorMatrix: React.SVGProps<SVGFEColorMatrixElement>;
+                feComponentTransfer: React.SVGProps<SVGFEComponentTransferElement>;
+                feComposite: React.SVGProps<SVGFECompositeElement>;
+                feConvolveMatrix: React.SVGProps<SVGFEConvolveMatrixElement>;
+                feDiffuseLighting: React.SVGProps<SVGFEDiffuseLightingElement>;
+                feDisplacementMap: React.SVGProps<SVGFEDisplacementMapElement>;
+                feDistantLight: React.SVGProps<SVGFEDistantLightElement>;
+                feFlood: React.SVGProps<SVGFEFloodElement>;
+                feFuncA: React.SVGProps<SVGFEFuncAElement>;
+                feFuncB: React.SVGProps<SVGFEFuncBElement>;
+                feFuncG: React.SVGProps<SVGFEFuncGElement>;
+                feFuncR: React.SVGProps<SVGFEFuncRElement>;
+                feGaussianBlur: React.SVGProps<SVGFEGaussianBlurElement>;
+                feImage: React.SVGProps<SVGFEImageElement>;
+                feMerge: React.SVGProps<SVGFEMergeElement>;
+                feMergeNode: React.SVGProps<SVGFEMergeNodeElement>;
+                feMorphology: React.SVGProps<SVGFEMorphologyElement>;
+                feOffset: React.SVGProps<SVGFEOffsetElement>;
+                fePointLight: React.SVGProps<SVGFEPointLightElement>;
+                feSpecularLighting: React.SVGProps<SVGFESpecularLightingElement>;
+                feSpotLight: React.SVGProps<SVGFESpotLightElement>;
+                feTile: React.SVGProps<SVGFETileElement>;
+                feTurbulence: React.SVGProps<SVGFETurbulenceElement>;
+                filter: React.SVGProps<SVGFilterElement>;
+                foreignObject: React.SVGProps<SVGForeignObjectElement>;
+                g: React.SVGProps<SVGGElement>;
+                image: React.SVGProps<SVGImageElement>;
+                line: React.SVGProps<SVGLineElement>;
+                linearGradient: React.SVGProps<SVGLinearGradientElement>;
+                marker: React.SVGProps<SVGMarkerElement>;
+                mask: React.SVGProps<SVGMaskElement>;
+                metadata: React.SVGProps<SVGMetadataElement>;
+                path: React.SVGProps<SVGPathElement>;
+                pattern: React.SVGProps<SVGPatternElement>;
+                polygon: React.SVGProps<SVGPolygonElement>;
+                polyline: React.SVGProps<SVGPolylineElement>;
+                radialGradient: React.SVGProps<SVGRadialGradientElement>;
+                rect: React.SVGProps<SVGRectElement>;
+                stop: React.SVGProps<SVGStopElement>;
+                switch: React.SVGProps<SVGSwitchElement>;
+                symbol: React.SVGProps<SVGSymbolElement>;
+                text: React.SVGProps<SVGTextElement>;
+                textPath: React.SVGProps<SVGTextPathElement>;
+                tspan: React.SVGProps<SVGTSpanElement>;
+                use: React.SVGProps<SVGUseElement>;
+                view: React.SVGProps<SVGViewElement>;
+            }
+        }
+    }
+}
\ No newline at end of file