ECMAScript Shims

All

166 repositories

AggregateError
Public
ES Proposal spec-compliant shim for AggregateError
javascript polyfill ecmascript aggregate error shim aggregateerror
JavaScript
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MIT License
•3•14•1•0•Updated Oct 24, 2025Oct 24, 2025
Error.isError
Public
An ESnext spec-compliant `Error.isError` shim/polyfill/replacement that works as far down as ES3.
javascript polyfill ecmascript error shim iserror
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
javascript polyfill array ecmascript shim contains includes
JavaScript
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MIT License
•12•43•1•0•Updated Oct 23, 2025Oct 23, 2025
ArrayBuffer.prototype.transfer
Public
ES Proposal spec-compliant shim for ArrayBuffer.prototype.transfer
JavaScript
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MIT License
•1•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•155•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•683•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
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MIT License
•0•1•1•0•Updated Sep 12, 2025Sep 12, 2025
String.prototype.replaceAll
Public
Spec-compliant polyfill for String.prototype.replaceAll ESnext proposal.
JavaScript
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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
javascript polyfill ecmascript error shim syntaxerror typeerror referenceerror aggregateerror rangeerror
JavaScript
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MIT License
•4•18•1•0•Updated Sep 12, 2025Sep 12, 2025
es-shim-api
Public
API contract, and rudimentary tests, for modules that conform to the *es-shim API*
es-shim
JavaScript
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MIT License
•4•80•1•0•Updated Sep 9, 2025Sep 9, 2025
String.prototype.lastIndexOf
Public
An ES-spec-compliant `String.prototype.lastIndexOf`shim/polyfill/replacement that works as far down as ES3.
javascript polyfill string ecmascript index shim lastindexof indexof
JavaScript
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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
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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
•6•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
javascript base64 ecmascript arraybuffer
JavaScript
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MIT License
•2•9•1•0•Updated Jul 7, 2025Jul 7, 2025
.github
Public
.github repo for es-shims org
JavaScript
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MIT License
•2•1•0•0•Updated May 30, 2025May 30, 2025
es-abstract
Public
ECMAScript spec abstract operations.
JavaScript
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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
javascript polyfill array ecmascript slice shim
JavaScript
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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
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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
javascript polyfill set ecmascript shim difference es-shims
JavaScript
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MIT License
•0•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
•22•9•0•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.
javascript polyfill resource ecmascript management using shim dispose disposablestack
JavaScript
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MIT License
•3•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.
javascript polyfill array ecmascript shim with
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
•15•4•0•0•Updated May 7, 2025May 7, 2025
WeakMap.prototype.getOrInsert
Public
ES Proposal spec-compliant shim for WeakMap.prototype.getOrInsert
JavaScript
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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
object-keys
Public
Object.keys shim
JavaScript
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MIT License
•16•6•0•0•Updated Apr 22, 2025Apr 22, 2025
Array.prototype.reduce
Public
Array.prototype.reduce spec-compliant polyfill
javascript polyfill array ecmascript reduce shim
JavaScript
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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.
javascript polyfill array ecmascript shim lastindexof
JavaScript
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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.
javascript polyfill array ecmascript shim findlastindex
JavaScript
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MIT License
•3•3•1•1•Updated Mar 14, 2025Mar 14, 2025