Repositories list

• iterator-helpers

  Public

  es-shims/iterator-helpers’s past year of commit activity
  An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.

  javascriptpolyfillmap+ 16filterecmascriptiteratordropfindforeachreduce+ 9

  JavaScript

  •

  MIT License

  •2•18•1•0•Updated Dec 13, 2025Dec 13, 2025

• es-abstract

  Public
  ECMAScript spec abstract operations.

  JavaScript

  •

  MIT License

  •30•6•0•1•Updated Dec 13, 2025Dec 13, 2025

• Symbol.prototype.description

  Public

  es-shims/Symbol.prototype.description’s past year of commit activity
  Spec-compliant shim for Symbol.prototype.description proposal.

  javascriptpolyfillecmascript+ 3descriptionshimsymbol

  JavaScript

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  MIT License

  •1•6•1•0•Updated Dec 11, 2025Dec 11, 2025

• Object.getOwnPropertyDescriptors

  Public
  Spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.

  javascriptpolyfillobject+ 4ecmascriptshimgetownpropertydescriptorgetownpropertydescriptors

  JavaScript

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  MIT License

  •8•20•2•0•Updated Dec 10, 2025Dec 10, 2025

• RegExp.prototype.flags

  Public

  es-shims/RegExp.prototype.flags’s past year of commit activity
  ES6 spec-compliant RegExp.prototype.flags shim

  javascriptpolyfillregex+ 4regexpecmascriptregular-expressionflags

  JavaScript

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  MIT License

  •10•8•1•1•Updated Dec 10, 2025Dec 10, 2025

• es-shim-api

  Public

  es-shims/es-shim-api’s past year of commit activity
  API contract, and rudimentary tests, for modules that conform to the *es-shim API*

  es-shim

  JavaScript

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  MIT License

  •4•81•1•0•Updated Oct 29, 2025Oct 29, 2025

• AggregateError

  Public

  es-shims/AggregateError’s past year of commit activity
  ES Proposal spec-compliant shim for AggregateError

  javascriptpolyfillecmascript+ 4aggregateerrorshimaggregateerror

  JavaScript

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  MIT License

  •2•14•1•0•Updated Oct 24, 2025Oct 24, 2025

• Error.isError

  Public

  es-shims/Error.isError’s past year of commit activity
  An ESnext spec-compliant `Error.isError` shim/polyfill/replacement that works as far down as ES3.

  javascriptpolyfillecmascript+ 3errorshimiserror

  JavaScript

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  MIT License

  •2•2•2•1•Updated Oct 24, 2025Oct 24, 2025

• array-includes

  Public
  Array.prototype.includes spec-compliant polyfill

  javascriptpolyfillarray+ 4ecmascriptshimcontainsincludes

  JavaScript

  •

  MIT License

  •12•43•1•0•Updated Oct 23, 2025Oct 23, 2025

• ArrayBuffer.prototype.transfer

  Public

  es-shims/ArrayBuffer.prototype.transfer’s past year of commit activity
  ES Proposal spec-compliant shim for ArrayBuffer.prototype.transfer

  JavaScript

  •

  MIT License

  •2•1•1•0•Updated Oct 23, 2025Oct 23, 2025

• globalThis

  Public
  ECMAScript spec-compliant polyfill/shim for `globalThis`.

  JavaScript

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  MIT License

  •13•156•2•0•Updated Oct 23, 2025Oct 23, 2025

• es6-shim

  Public
  ECMAScript 6 compatibility shims for legacy JS engines

  JavaScript

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  MIT License

  •383•685•0•0•Updated Oct 9, 2025Oct 9, 2025

• Map.groupBy

  Public
  An ESnext spec-compliant `Map.groupBy` shim/polyfill/replacement that works as far down as ES3.

  JavaScript

  •

  MIT License

  •1•1•1•0•Updated Sep 12, 2025Sep 12, 2025

• String.prototype.replaceAll

  Public
  Spec-compliant polyfill for String.prototype.replaceAll ESnext proposal.

  JavaScript

  •

  MIT License

  •2•36•1•0•Updated Sep 12, 2025Sep 12, 2025

• error-cause

  Public
  An ES-spec-compliant shim/polyfill/replacement for the `.cause` property on all Error types that works as far down as ES3

  javascriptpolyfillecmascript+ 9errorshimsyntaxerrortypeerrorreferenceerroraggregateerrorrangeerror+ 2

  JavaScript

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  MIT License

  •4•19•1•0•Updated Sep 12, 2025Sep 12, 2025

• String.prototype.lastIndexOf

  Public
  An ES-spec-compliant `String.prototype.lastIndexOf`shim/polyfill/replacement that works as far down as ES3.

  javascriptpolyfillstring+ 5ecmascriptindexshimlastindexofindexof

  JavaScript

  •

  MIT License

  •1•0•1•0•Updated Jul 24, 2025Jul 24, 2025

• WeakMap.prototype.getOrInsertComputed

  Public
  ES Proposal spec-compliant shim for ES Proposal spec-compliant shim for WeakMap.prototype.getOrInsertComputed

  JavaScript

  •

  MIT License

  •0•0•1•0•Updated Jul 16, 2025Jul 16, 2025

• String.prototype.codePointAt

  Public
  A robust & optimized `String.prototype.codePointAt` polyfill, based on the ECMAScript 6 specification.

  JavaScript

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  MIT License

  •5•1•0•0•Updated Jul 14, 2025Jul 14, 2025

• es-arraybuffer-base64

  Public
  An ES-spec-compliant shim/polyfill/replacement for ArrayBuffer base64 methods that works as far down as ES3

  javascriptbase64ecmascript+ 1arraybuffer

  JavaScript

  •

  MIT License

  •3•11•1•0•Updated Jul 7, 2025Jul 7, 2025

• .github

  Public
  .github repo for es-shims org

  JavaScript

  •

  MIT License

  •1•1•0•0•Updated May 30, 2025May 30, 2025

• Array.prototype.slice

  Public
  ES spec-compliant `Array.prototype.slice` shim/polyfill/replacement that works as far down as ES3

  javascriptpolyfillarray+ 3ecmascriptsliceshim

  JavaScript

  •

  MIT License

  •1•1•1•0•Updated May 16, 2025May 16, 2025

• TypedArray.prototype.slice

  Public
  ES spec-compliant shim for TypedArray.prototype.slice

  JavaScript

  •

  MIT License

  •1•3•1•0•Updated May 16, 2025May 16, 2025

• Set.prototype.difference

  Public
  An ESnext spec-compliant `Set.prototype.difference` shim/polyfill/replacement that works as far down as ES3

  javascriptpolyfillset+ 4ecmascriptshimdifferencees-shims

  JavaScript

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  MIT License

  •1•6•1•0•Updated May 16, 2025May 16, 2025

• object.assign

  Public
  ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim

  JavaScript

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  MIT License

  •18•9•0•0•Updated May 16, 2025May 16, 2025

• DisposableStack

  Public

  es-shims/DisposableStack’s past year of commit activity
  An ESnext spec-compliant `DisposableStack`, `AsyncDisposableStack`, `Symbol.dispose`, and `Symbol.asyncDispose` shim/polyfill/replacement that works as far down as ES3.

  javascriptpolyfillresource+ 6ecmascriptmanagementusingshimdisposedisposablestack

  JavaScript

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  MIT License

  •4•34•2•0•Updated May 12, 2025May 12, 2025

• Array.prototype.with

  Public
  An ESnext spec-compliant `Array.prototype.with` shim/polyfill/replacement that works as far down as ES3.

  javascriptpolyfillarray+ 3ecmascriptshimwith

  JavaScript

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  MIT License

  •2•0•1•0•Updated May 12, 2025May 12, 2025

• Map.prototype.getOrInsert

  Public
  ES Proposal spec-compliant shim for Map.prototype.getOrInsert

  JavaScript

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  MIT License

  •0•0•1•0•Updated May 9, 2025May 9, 2025

• Array.from

  Public
  A robust & optimized ES3-compatible polyfill for the `Array.from` method in ECMAScript 6.

  JavaScript

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  MIT License

  •13•4•0•0•Updated May 7, 2025May 7, 2025

• WeakMap.prototype.getOrInsert

  Public
  ES Proposal spec-compliant shim for WeakMap.prototype.getOrInsert

  JavaScript

  •

  MIT License

  •0•0•1•0•Updated May 3, 2025May 3, 2025

• Map.prototype.getOrInsertComputed

  Public
  ES Proposal spec-compliant shim for Map.prototype.getOrInsertComputed

  JavaScript

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  MIT License

  •1•1•1•1•Updated Apr 27, 2025Apr 27, 2025