Add Document.parseHTMLUnsafe() and friends (#999)

Co-authored-by: Daniel D. Beck <[email protected]>

Author: foolip

features/parse-html-unsafe.dist.yml

@@ -0,0 +1,21 @@
+# Generated from: parse-html-unsafe.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+name: Unsanitized HTML parsing methods
+description: The `Document.parseHTMLUnsafe()` static method parses HTML into a DOM tree, while the `setHTMLUnsafe()` method of `Element` and `ShadowRoot` parses and inserts HTML into an existing tree. No sanitization applies to these methods, so never call them with user-provided HTML strings.
+spec: https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#unsafe-html-parsing-methods
+status:
+  baseline: low
+  baseline_low_date: 2024-04-18
+  support:
+    chrome: "124"
+    chrome_android: "124"
+    edge: "124"
+    firefox: "123"
+    firefox_android: "123"
+    safari: "17.4"
+    safari_ios: "17.4"
+compat_features:
+  - api.Document.parseHTMLUnsafe_static
+  - api.Element.setHTMLUnsafe
+  - api.ShadowRoot.setHTMLUnsafe

features/parse-html-unsafe.yml

@@ -0,0 +1,7 @@
+name: Unsanitized HTML parsing methods
+description: The `Document.parseHTMLUnsafe()` static method parses HTML into a DOM tree, while the `setHTMLUnsafe()` method of `Element` and `ShadowRoot` parses and inserts HTML into an existing tree. No sanitization applies to these methods, so never call them with user-provided HTML strings.
+spec: https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#unsafe-html-parsing-methods
+compat_features:
+  - api.Document.parseHTMLUnsafe_static
+  - api.Element.setHTMLUnsafe
+  - api.ShadowRoot.setHTMLUnsafe