Repositories list

• Error.isError

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

  javascriptpolyfillecmascript+ 3errorshimiserror

  JavaScript

  •

  MIT License

  •2•2•2•1•Updated Jun 12, 2025Jun 12, 2025

• AggregateError

  Public
  ES Proposal spec-compliant shim for AggregateError

  polyfillaggregateerror+ 4shimaggregateerrorjavascriptecmascript

  JavaScript

  •

  MIT License

  •3•14•1•0•Updated Jun 2, 2025Jun 2, 2025

• array-includes

  Public
  Array.prototype.includes spec-compliant polyfill

  arrayshimcontains+ 4includesjavascriptpolyfillecmascript

  JavaScript

  •

  MIT License

  •12•43•1•0•Updated Jun 2, 2025Jun 2, 2025

• .github

  Public
  .github repo for es-shims org

  JavaScript

  •

  MIT License

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

• es-abstract

  Public
  ECMAScript spec abstract operations.

  JavaScript

  •

  MIT License

  •30•6•0•0•Updated May 29, 2025May 29, 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

  •0•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

  •

  MIT License

  •0•7•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

  •

  MIT License

  •22•9•0•0•Updated May 16, 2025May 16, 2025

• Map.groupBy

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

  JavaScript

  •

  MIT License

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

• DisposableStack

  Public
  An ESnext spec-compliant `DisposableStack`, `AsyncDisposableStack`, `Symbol.dispose`, and `Symbol.asyncDispose` shim/polyfill/replacement that works as far down as ES3.

  polyfillresourcemanagement+ 6usingshimdisposedisposablestackjavascriptecmascript

  JavaScript

  •

  MIT License

  •4•31•1•0•Updated May 12, 2025May 12, 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

  •1•9•1•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.

  shimwithjavascript+ 3polyfillarrayecmascript

  JavaScript

  •

  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

  •

  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

  •

  MIT License

  •15•4•0•0•Updated May 7, 2025May 7, 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 May 3, 2025May 3, 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

  •

  MIT License

  •0•1•1•0•Updated Apr 27, 2025Apr 27, 2025

• object-keys

  Public
  Object.keys shim

  JavaScript

  •

  MIT License

  •17•6•0•0•Updated Apr 22, 2025Apr 22, 2025

• Array.prototype.reduce

  Public
  Array.prototype.reduce spec-compliant polyfill

  javascriptpolyfillarray+ 3ecmascriptreduceshim

  JavaScript

  •

  MIT License

  •2•4•1•0•Updated Mar 15, 2025Mar 15, 2025

• Array.prototype.lastIndexOf

  Public
  An ES2015 spec-compliant `Array.prototype.lastIndexOf` shim/polyfill/replacement that works as far down as ES3.

  javascriptpolyfillarray+ 3ecmascriptshimlastindexof

  JavaScript

  •

  MIT License

  •1•3•1•0•Updated Mar 14, 2025Mar 14, 2025

• Array.prototype.findLastIndex

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

  arrayshimfindlastindex+ 3javascriptpolyfillecmascript

  JavaScript

  •

  MIT License

  •3•3•1•1•Updated Mar 14, 2025Mar 14, 2025

• Array.prototype.splice

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

  spliceshimjavascript+ 3polyfillarrayecmascript

  JavaScript

  •

  MIT License

  •1•0•1•0•Updated Mar 14, 2025Mar 14, 2025

• Array.prototype.toSpliced

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

  JavaScript

  •

  MIT License

  •1•0•1•0•Updated Mar 14, 2025Mar 14, 2025

• Array.prototype.push

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

  javascriptpolyfillarray+ 2ecmascriptshim

  JavaScript

  •

  MIT License

  •2•0•1•0•Updated Mar 14, 2025Mar 14, 2025

• es-string-html-methods

  Public
  An ES-spec-compliant shim/polyfill/replacement for the Annex B String.prototype HTML methods that works as far down as ES3

  javascriptpolyfillhtml+ 16stringecmascriptsmalllinkanchorblinkshim+ 9

  JavaScript

  •

  MIT License

  •2•1•1•0•Updated Mar 14, 2025Mar 14, 2025

• String.prototype.padStart

  Public
  ES spec-compliant shim for String.prototype.padStart

  JavaScript

  •

  MIT License

  •4•23•1•0•Updated Mar 14, 2025Mar 14, 2025

• RegExp.prototype.flags

  Public
  ES6 spec-compliant RegExp.prototype.flags shim

  regexregexpregular-expression+ 4flagsjavascriptpolyfillecmascript

  JavaScript

  •

  MIT License

  •10•8•1•1•Updated Mar 5, 2025Mar 5, 2025

• TypedArray.prototype.at

  Public
  An ES5 spec-compliant `TypedArray.prototype.at` shim/polyfill/replacement that works as far down as ES3

  JavaScript

  •

  MIT License

  •0•1•1•0•Updated Mar 5, 2025Mar 5, 2025

• Date.prototype.getYear

  Public
  An ES5 spec-compliant `Date.prototype.getYear` shim/polyfill/replacement that works as far down as ES3.

  JavaScript

  •

  MIT License

  •0•1•1•0•Updated Mar 4, 2025Mar 4, 2025