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Standard library

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ecmascript-proposalses2015es6es7esnextjavascriptjspolyfill
github.com/zloirock/core-jscore-js.ioMITzloirock95.1M / week25.5k · 1.7k forks · 146 contributors
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Compares against 3.51.0 (latest stable)
Latest Stable3.51.0Oct 19, 2026
Latest Beta3.0.0-beta.20Mar 17, 2019
Latest Alpha4.0.0-alpha.1Mar 22, 2026
Release cadenceEvery 2 months
Last releaseOct 19, 2026
Open advisories0
Changelog quality100% curated
GitHub Releases + CHANGELOG
Release history SecurityYou're on
3.x4.x
STABLE · RCPRE-RELEASE2024AprJulOct2025AprJulOct2026AprJulOct

262 older or filtered releases not shown.

Upgrade guides

Breaking changes and a migration checklist for each major version
core-js 2 → 32.6.12 → 3.51.0Oct 19, 2026 BreakingBreaking26Security2Platform3Deprecated3New192Changed413Fixed448Other190core-js 1 → 21.2.7 → 2.6.12Nov 25, 2020 BreakingBreaking8Deprecated4New30Changed30Fixed75Other12core-js 0.9 → 10.9.18 → 1.2.7Jul 17, 2016 BreakingBreaking8New8Changed14Fixed36Other3core-js 0.8 → 0.90.8.4 → 0.9.18Jun 17, 2015 Unknowncore-js 0.7 → 0.80.7.2 → 0.8.4Apr 17, 2015 Unknowncore-js 0.6 → 0.70.6.1 → 0.7.2Mar 8, 2015 Unknowncore-js 0.5 → 0.60.5.4 → 0.6.1Feb 24, 2015 Unknowncore-js 0.4 → 0.50.4.10 → 0.5.4Feb 15, 2015 Unknowncore-js 0.3 → 0.40.3.3 → 0.4.10Jan 28, 2015 Unknowncore-js 0.2 → 0.30.2.5 → 0.3.3Dec 28, 2014 Unknowncore-js 0.1 → 0.20.1.5 → 0.2.5Dec 20, 2014 Unknowncore-js 0.0 → 0.10.0.9 → 0.1.5Dec 1, 2014 Unknown
VersionChannelDateChangesSecurity
4.0.0-alpha.1 AlphaMar 22, 2026No changes listed4.0.0-alpha.0 AlphaFeb 13, 2024No changes listed3.51.0 StableOct 19, 2026New3Changed16Fixed63.50.0 youStableAug 5, 2026Breaking1New5Changed19Fixed11Other13.49.0 StableMar 16, 2026Changed16Fixed86Other13.48.0 StableJan 21, 2026New2Changed1Fixed5Other93.47.0 StableNov 18, 2025New5Changed2Fixed1Other53.46.0 StableOct 9, 2025Breaking1New1Changed1Fixed3Other93.45.1 StableAug 20, 2025Fixed1Other43.45.0 StableAug 4, 2025New6Changed2Fixed3Other53.44.0 StableJul 7, 2025New1Changed3Fixed4Other103.43.0 StableJun 9, 2025Breaking1New7Changed2Fixed10Other143.42.0 StableApr 29, 2025New2Changed1Fixed5Other13.41.0 StableMar 1, 2025New3Fixed1Other13.40.0 StableJan 7, 2025New1Changed19Fixed2Other13.39.0 StableOct 31, 2024New5Changed11Fixed2Other23.38.1 StableAug 20, 2024Fixed1Other83.38.0 StableAug 4, 2024New6Changed10Fixed1Other113.37.1 StableMay 14, 2024Changed13Fixed13.37.0 StableApr 16, 2024New12Changed9Fixed2Other6