JavaScript Polyfills and Shims

15 repos

Polyfills and shims that backport modern JavaScript features to older environments and browsers that don't natively support ES2015+ standards. This cluster contains implementations of standardized methods like Array.prototype.at, Array.prototype.flatMap, Object.entries, Object.values, and getOwnPropertyDescriptors—all designed to let developers use contemporary JavaScript APIs without breaking compatibility with legacy runtime environments. The repositories here are foundational utilities for cross-browser and cross-version JavaScript compatibility.

JavaScript · 15

shim ·36,170

javascript ·33,104

polyfill ·33,072

es6 ·28,629

esnext ·25,531

es2015 ·25,531

js ·25,531

es7 ·25,531

ecmascript-proposals ·25,531

ponyfill ·25,531

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es-shims/es5-shim

ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines

JavaScript

7,074

995 commits

es-shims/Object.values

ES2017 spec-compliant shim for Object.values

JavaScript

126 commits

es-shims/Array.prototype.flatMap

An ESnext spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down…

JavaScript

103 commits

es-shims/Array.prototype.at

An ES-spec-compliant (proposed) `Array.prototype.at`shim/polyfill/replacement that works as far…

JavaScript

83 commits

es-shims/Array.prototype.flat

An ESnext spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as…

JavaScript

103 commits

es-shims/object.getownpropertydescriptors

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

JavaScript

180 commits

es-shims/Object.entries

ES2017 spec-compliant shim for Object.entries

JavaScript

129 commits

es-shims/array-includes

Array.prototype.includes spec-compliant polyfill

JavaScript

238 commits

paulmillr/es6-shim

ECMAScript 6 compatibility shims for legacy JS engines

JavaScript

3,098

1,455 commits

es-shims/RegExp.escape

An ESnext spec-compliant `RegExp.escape` shim/polyfill/replacement that works as far down as ES3.

JavaScript

78 commits

es-shims/Promise.allSettled

ES Proposal spec-compliant shim for Promise.allSettled

JavaScript

68 commits

es-shims/DisposableStack

An ESnext spec-compliant `DisposableStack`, `AsyncDisposableStack`, `Symbol.dispose`, and…

JavaScript

92 commits

zloirock/core-js

Standard Library

JavaScript

25,531

7,890 commits

es-shims/Object.fromEntries

Official ES spec-compliant polyfill for Object.fromEntries

JavaScript

73 commits

es-shims/es6-shim

ECMAScript 6 compatibility shims for legacy JS engines

JavaScript

681

1,455 commits