Leaderboards Open Source Index
GitHub

LFX Platform

Know more about LFX Platform

LFX Insights
Curated Collections

JavaScript Polyfill Libraries

Libraries that provide polyfills, shims, or ponyfills to enable modern ECMAScript features in environments that do not fully support them.

The Linux Foundation

by The Linux Foundation

・

31 projects ・ Updated 14 Mar 2025

Project
Contributors
Organizations
Software value
Angular
22,396
3,578
$39M
Babel
7,148
2,586
$28M
Modernizr
2,370
785
$430K
core-js
2,288
787
$3.9M
SystemJS
1,546
544
$313K
window.fetch polyfill
1,304
459
$91K
Polyfill.io
1,099
409
$37M
esm
602
291
$828K
Web Components Polyfills
475
147
$1.7M
Locutus
464
129
$11M
ES6-Promise
445
176
$65K
es5-shim
355
167
$245K
es5-ext
276
84
$501K
ES Module Shims
230
91
$1.6M
ES6 Shim
229
91
$335K
Temporal Polyfill
169
61
$509K
Promise Polyfill
165
70
$52K
ResizeObserver Polyfill
150
61
$86K
scroll-into-view-if-needed
115
42
$148K
WhatWG Node
105
51
$619K
es-abstract
104
46
$3.1M
URL Polyfill
83
25
$68K
AbortController Polyfill
62
26
$32K
URLPattern polyfill
62
32
$157K
es6-symbol
42
21
$14K
regexpu-core
37
21
$274K
Object.assign
34
23
$27K
AMP HTML
0
0
$0
isarray
0
0
$0
object-assign
0
0
$0
webextension-polyfill
0
0
$0
Looking for a project that’s not listed?