Add several discouraged JavaScript features

features/accessor-methods.yml

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+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
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+    # No `alternatives` becuase it would be `alternatives:
+    # [object-object, functions]`. In the future it'd be nice to have an
+    # internal reference to the object defineProperty method and the function
+    # get/set syntax.
+compat_features:
+  - javascript.builtins.Object.defineGetter
+  - javascript.builtins.Object.defineSetter
+  - javascript.builtins.Object.lookupGetter
+  - javascript.builtins.Object.lookupSetter

features/accessor-methods.yml.dist

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+# Generated from: accessor-methods.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "3"
+    safari_ios: "1"
+compat_features:
+  - javascript.builtins.Object.defineGetter
+  - javascript.builtins.Object.defineSetter
+  - javascript.builtins.Object.lookupGetter
+  - javascript.builtins.Object.lookupSetter

features/date-get-year-set-year.yml

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+name: getYear() and setYear()
+description: The `getYear()` and `setYear()` methods of `Date` objects get and set the year offset to 1900, changing a date's year in way that is subject to the year 2000 problem.
+spec: https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-date.prototype.getyear
+group: javascript
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+  # No `alternatives` becuase it would be `alternatives: [date]`. In the future
+  # it'd be nice to have an internal reference to getFullYear() and
+  # setFullYear() instead.
+compat_features:
+  - javascript.builtins.Date.getYear
+  - javascript.builtins.Date.setYear

features/date-get-year-set-year.yml.dist

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+# Generated from: date-get-year-set-year.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "1"
+    safari_ios: "1"
+compat_features:
+  - javascript.builtins.Date.getYear
+  - javascript.builtins.Date.setYear

features/date-to-gmt-string.yml

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+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
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+  # No `alternatives` becuase it would be `alternatives: [date]`. In the future
+  # it'd be nice to have an internal reference to the `toUTCString()` method
+  # instead.
+compat_features:
+  - javascript.builtins.Date.toGMTString

features/date-to-gmt-string.yml.dist

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+# Generated from: date-to-gmt-string.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "1"
+    safari_ios: "1"
+compat_features:
+  - javascript.builtins.Date.toGMTString

features/escape-unescape.yml

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+name: escape() and unescape()
+description: The `escape()` and `unescape()` built-in Javascript methods encode and unencode strings using percent encoding, where certain characters are replaced by hexidecimal escape sequences.
+spec: https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-escape-string
+group: javascript
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+  # No `alternatives` becuase it would be `alternatives: [javascript]`. In the
+  # future it'd be nice to have an internal reference to encodeURI(),
+  # decodeURI(), encodeURIComponent(), and decodeURIComponent() instead.
+compat_features:
+  - javascript.builtins.escape
+  - javascript.builtins.unescape

features/escape-unescape.yml.dist

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+# Generated from: escape-unescape.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "1"
+    safari_ios: "1"
+compat_features:
+  - javascript.builtins.escape
+  - javascript.builtins.unescape

features/html-wrapper-methods.yml

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+name: HTML wrapper methods
+description: JavaScript built-in methods such as, `String.bold()` and `String.italics()`, wrap strings in (often historic) HTML.
+spec: https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-properties-of-the-string.prototype-object
+group: javascript
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+  alternatives:
+    - dom
+compat_features:
+  - javascript.builtins.String.anchor
+  - javascript.builtins.String.big
+  - javascript.builtins.String.blink
+  - javascript.builtins.String.bold
+  - javascript.builtins.String.fixed
+  - javascript.builtins.String.fontcolor
+  - javascript.builtins.String.fontsize
+  - javascript.builtins.String.italics
+  - javascript.builtins.String.link
+  - javascript.builtins.String.small
+  - javascript.builtins.String.strike
+  - javascript.builtins.String.sub
+  - javascript.builtins.String.substr
+  - javascript.builtins.String.sup

features/html-wrapper-methods.yml.dist

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+# Generated from: html-wrapper-methods.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "1"
+    safari_ios: "1"
+compat_features:
+  - javascript.builtins.String.anchor
+  - javascript.builtins.String.big
+  - javascript.builtins.String.blink
+  - javascript.builtins.String.bold
+  - javascript.builtins.String.fixed
+  - javascript.builtins.String.fontcolor
+  - javascript.builtins.String.fontsize
+  - javascript.builtins.String.italics
+  - javascript.builtins.String.link
+  - javascript.builtins.String.small
+  - javascript.builtins.String.strike
+  - javascript.builtins.String.sub
+  - javascript.builtins.String.substr
+  - javascript.builtins.String.sup

features/proto.yml

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+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__
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+  # No `alternatives` becuase it would be `alternatives: [object]`. In the
+  # future it'd be nice to have an internal reference to `getPrototypeOf()` and
+  # `setPrototypeOf()` instead.
+compat_features:
+  - javascript.builtins.Object.proto

features/proto.yml.dist

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+# Generated from: proto.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "3"
+    safari_ios: "1"
+compat_features:
+  - javascript.builtins.Object.proto

features/regexp-compile.yml

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+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
+discouraged:
+  according_to:
+    - https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers
+  # No `alternatives` becuase it would be `alternatives: [regexp]`. In the
+  # future it'd be nice to have an internal reference to the RegExp()
+  # constructor instead.
+compat_features:
+  - javascript.builtins.RegExp.compile

features/regexp-compile.yml.dist

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+# Generated from: regexp-compile.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "3.1"
+    safari_ios: "2"
+compat_features:
+  - javascript.builtins.RegExp.compile