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ECMAScript Shims · GitHub
ECMAScript Shims
A community host for shims and polyfills that are compliant to EcmaScript specs.
Pinned
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ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines
JavaScript
7.1k
892
ECMAScript spec-compliant polyfill/shim for `globalThis`.
JavaScript
156
13
ES Proposal spec-compliant shim for Promise.prototype.finally
JavaScript
138
9
ES Proposal spec-compliant shim for Promise.allSettled
JavaScript
97
10
API contract, and rudimentary tests, for modules that conform to the *es-shim API*
JavaScript
80
4
Repositories
Showing 10 of 166 repositories
Error.isError
Public
An ESnext spec-compliant `Error.isError` shim/polyfill/replacement that works as far down as ES3.
es-shims/Error.isError’s past year of commit activity
JavaScript
2
MIT
2
2
1
Updated Jul 24, 2025
String.prototype.lastIndexOf
Public
An ES-spec-compliant `String.prototype.lastIndexOf`shim/polyfill/replacement that works as far down as ES3.
es-shims/String.prototype.lastIndexOf’s past year of commit activity
JavaScript
0
MIT
1
1
0
Updated Jul 24, 2025
es-shims/WeakMap.prototype.getOrInsertComputed’s past year of commit activity
JavaScript
0
MIT
0
1
0
Updated Jul 16, 2025
es-shims/String.prototype.codePointAt’s past year of commit activity
JavaScript
1
MIT
6
0
0
Updated Jul 14, 2025
es-arraybuffer-base64
Public
An ES-spec-compliant shim/polyfill/replacement for ArrayBuffer base64 methods that works as far down as ES3
es-shims/es-arraybuffer-base64’s past year of commit activity
JavaScript
8
MIT
1
1
0
Updated Jul 7, 2025
AggregateError
Public
ES Proposal spec-compliant shim for AggregateError
es-shims/AggregateError’s past year of commit activity
JavaScript
14
MIT
3
1
0
Updated Jun 2, 2025
array-includes
Public
Array.prototype.includes spec-compliant polyfill
es-shims/array-includes’s past year of commit activity
JavaScript
43
MIT
12
1
0
Updated Jun 2, 2025
.github
Public
.github repo for es-shims org
es-shims/.github’s past year of commit activity
JavaScript
1
MIT
2
0
0
Updated May 30, 2025
es-shims/es-abstract’s past year of commit activity
JavaScript
6
MIT
37
0
0
Updated May 29, 2025
Array.prototype.slice
Public
ES spec-compliant `Array.prototype.slice` shim/polyfill/replacement that works as far down as ES3
es-shims/Array.prototype.slice’s past year of commit activity
JavaScript
1
MIT
1
1
0
Updated May 16, 2025
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