Correct ommissions from the "JavaScript" group

Author: jugglinmike

features/accessor-methods.yml

@@ -1,6 +1,7 @@
 name: Accessor methods
 description: The `__defineGetter__()` and `__defineSetter__()` methods of objects bind a function to a property, which is called on setting or reading the property.
 spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype-legacy-accessor-methods
+group: javascript
 discouraged:
   according_to:
     - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers

features/date-to-gmt-string.yml

@@ -1,6 +1,7 @@
 name: toGMTString()
 description: The `toGMTString()` method of `Date` objects is an alias to the `toUTCString()` method.
 spec: https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-date.prototype.togmtstring
+group: javascript
 discouraged:
   according_to:
     - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers

features/error-cause.yml

@@ -1,6 +1,7 @@
 name: Error cause
 description: The `cause` property of errors records the specific original cause of the error, particularly for errors that have been re-thrown.
 spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-installerrorcause
+group: javascript
 compat_features:
   - javascript.builtins.Error.Error.options_cause_parameter
   - javascript.builtins.Error.cause

features/is-error.yml

@@ -1,5 +1,6 @@
 name: Error.isError()
 description: The `Error.isError()` static method checks whether a value is an `Error` object.
 spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-error.iserror
+group: javascript
 compat_features:
   - javascript.builtins.Error.isError

features/object-hasown.yml

@@ -1,5 +1,6 @@
 name: Object.hasOwn()
 description: The `Object.hasOwn()` static method checks whether an object has a given property. It's a more robust alternative to the `Object.prototype.hasOwnProperty()` method.
 spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.hasown
+group: javascript
 compat_features:
   - javascript.builtins.Object.hasOwn

features/object-object.yml

@@ -3,6 +3,7 @@ description: Objects in JavaScript are collections of key-value pairs.
 spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object-objects
 status:
   compute_from: javascript.builtins.Object
+group: javascript
 compat_features:
   - javascript.builtins.Object
   - javascript.builtins.Object.Object

features/proto.yml

@@ -1,6 +1,7 @@
 name: __proto__
 description: The `__proto__` property of objects partially exposes the prototype of an object.
 spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype.__proto__
+group: javascript
 discouraged:
   according_to:
     - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers

features/regexp-compile.yml

@@ -1,6 +1,7 @@
 name: RegExp compile()
 description: The `compile()` method of `RegExp` objects recompiles an existing regular expression object using a new pattern and flags.
 spec: https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-regexp.prototype.compile
+group: regexps
 discouraged:
   according_to:
     - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers

features/regexp-escape.yml

@@ -1,5 +1,6 @@
 name: RegExp.escape()
 description: The `RegExp.escape()` static method takes a string and replaces any characters that are potentially special characters of a regular expression with equivalent escape sequences. For example, `RegExp.escape("[abc]")` returns `"\\[abc\\]"`.
 spec: https://tc39.es/ecma262/multipage/text-processing.html#sec-regexp.escape
+group: regexps
 compat_features:
   - javascript.builtins.RegExp.escape

features/regexp-static-properties.yml

@@ -1,6 +1,7 @@
 name: RegExp static properties
 description: The `RegExp` object has several static properties to access the input and results of the most-recent regular expression match.
 spec: https://github.com/tc39/proposal-regexp-legacy-features
+group: regexps
 discouraged:
   according_to:
     - https://github.com/tc39/proposal-regexp-legacy-features