v2.6.12

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• Added code points / code units explicit feature detection in String#at for preventing breakage code which use obsolete String#at proposal polyfill
• Added OPEN_SOURCE_CONTRIBUTOR detection in postinstall
• Added Drone CI detection in postinstall

v2.6.11

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• Returned usage of node -e in the postinstall scripts for better cross-platform compatibility, #​582
• Improved CI detection in the postinstall script, #​707

v2.6.10

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• Show similar postinstall messages only once per npm i, #​597

v2.6.9

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• Some fixes and improvements of the postinstall script like support npm color config (#​556) or adding support of ADBLOCK env variable

v2.6.8

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• Added a workaround of a strange npx bug on postinstall, #​551

v2.6.7

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• Added one more workaround of alternative not completely correct Symbol polyfills, #​550, #​554

v2.6.6

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• Fixed IE8- non-enumerable properties support in Object.{ assign, entries, values }, #​541
• Fixed support of primitives in Object.getOwnPropertySymbols in Chrome 38 / 39, #​539
• Show a message on postinstall

v2.6.5

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• Fixed buggy String#padStart and String#padEnd mobile Safari implementations, #​414.

v2.6.4

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• Added a workaround against crushing an old IE11.0.9600.16384 build, #​485.

v2.6.3

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• Added a workaround for babel-minify bug, #​479

v2.6.2

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• Fixed handling of $ in String#replace, #​471

v2.6.1

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• Added code points / code units explicit feature detection in String#at for preventing breakage code which use obsolete String#at proposal polyfill
• Added OPEN_SOURCE_CONTRIBUTOR detection in postinstall
• Added Drone CI detection in postinstall

v2.6.0

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• Add direct .exec calling to RegExp#{@​@​replace, @​@​split, @​@​match, @​@​search}. Also, added fixes for RegExp#exec method. #​428, #​435, #​458, thanks @​nicolo-ribaudo.

v2.5.7

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• Get rid of reserved variable name final, related #​400

v2.5.6

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• Forced replace native Promise in V8 6.6 (Node 10 and Chrome 66) because of a bug with resolving custom thenables
• Added a workaround for usage buggy native LG WebOS 2 Promise in microtask implementation, #​396
• Added modern version internal debugging information about used versions

v2.5.5

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• Fix some edge cases of Reflect.set, #​392 and #​393

v2.5.4

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• Fixed one case of deoptimization built-in iterators in V8, related #​377
• Fixed some cases of iterators feature detection, #​368
• Fixed manually entered NodeJS domains issue in Promise, #​367
• Fixed Number.{parseInt, parseFloat} entry points
• Fixed __(define|lookup)[GS]etter__ export in the library version

v2.5.3

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• Fixed calling onunhandledrejectionhandler multiple times for one Promise chain, #​318
• Forced replacement of String#{padStart, padEnd} in Safari 10 because of a bug, #​280
• Fixed Array#@​@​iterator in a very rare version of WebKit, #​236 and #​237
• One more #​345-related fix

v2.5.2

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• MutationObserver no longer used for microtask implementation in iOS Safari because of bug with scrolling, #​339
• Fixed JSON.stringify(undefined, replacer) case in the wrapper from the Symbol polyfill, #​345
• Array() calls changed to new Array() for V8 optimisation

v2.5.1

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• Updated Promise#finally per tc39/proposal-promise-finally#37
• Optimized usage of some internal helpers for reducing size of shim version
• Fixed some entry points for virtual methods

v2.5.0

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• Added Promise#finally stage 3 proposal, #​225
• Added Promise.try stage 1 proposal
• Added Array#flatten and Array#flatMap stage 1 proposal
• Added .of and .from methods on collection constructors stage 1 proposal:
  • Map.of
  • Set.of
  • WeakSet.of
  • WeakMap.of
  • Map.from
  • Set.from
  • WeakSet.from
  • WeakMap.from
• Added Math extensions stage 1 proposal, #​226:
  • Math.clamp
  • Math.DEG_PER_RAD
  • Math.degrees
  • Math.fscale
  • Math.RAD_PER_DEG
  • Math.radians
  • Math.scale
• Added Math.signbit stage 1 proposal
• Updated global stage 3 proposal - added global global object, System.global deprecated
• Updated Object.getOwnPropertyDescriptors to the final version - it should not create properties if descriptors are undefined
• Updated the list of iterable DOM collections, #​249, added:
  • CSSStyleDeclaration#@​@​iterator
  • CSSValueList#@​@​iterator
  • ClientRectList#@​@​iterator
  • DOMRectList#@​@​iterator
  • DOMStringList#@​@​iterator
  • DataTransferItemList#@​@​iterator
  • FileList#@​@​iterator
  • HTMLAllCollection#@​@​iterator
  • HTMLCollection#@​@​iterator
  • HTMLFormElement#@​@​iterator
  • HTMLSelectElement#@​@​iterator
  • MimeTypeArray#@​@​iterator
  • NamedNodeMap#@​@​iterator
  • PaintRequestList#@​@​iterator
  • Plugin#@​@​iterator
  • PluginArray#@​@​iterator
  • SVGLengthList#@​@​iterator
  • SVGNumberList#@​@​iterator
  • SVGPathSegList#@​@​iterator
  • SVGPointList#@​@​iterator
  • SVGStringList#@​@​iterator
  • SVGTransformList#@​@​iterator
  • SourceBufferList#@​@​iterator
  • TextTrackCueList#@​@​iterator
  • TextTrackList#@​@​iterator
  • TouchList#@​@​iterator
• Updated stages of proposals:
  • Object.getOwnPropertyDescriptors to stage 4 (ES2017)
  • String padding to stage 4 (ES2017)
  • global to stage 3
  • String trimming to stage 2
• Updated typed arrays to the modern (ES2016+) arguments validation,
  #​293
• Fixed %TypedArray%.from Safari bug, #​285
• Fixed compatibility with old version of Prototype.js, #​278, #​289
• Function#name no longer cache the result for correct behaviour with inherited constructors, #​296
• Added errors on incorrect context of collection methods, #​272
• Fixed conversion typed array constructors to string, fix #​300
• Fixed Set#size with debugger ReactNative for Android, #​297
• Fixed an issue with Electron-based debugger, #​230
• Fixed compatibility with incomplete third-party WeakMap polyfills, #​252
• Added a fallback for Date#toJSON in engines without native Date#toISOString, #​220
• Added support for Sphere Dispatch API, #​286
• Seriously changed the coding style and the ESLint config
• Updated many dev dependencies (webpack, uglify, etc)
• Some other minor fixes and optimizations