Core JS

Category - JavaScript Libraries

core-js is a modular standard library for JavaScript. Core-js includes polyfills for ECMAScript up to 2021: promises, symbols, collections, iterators, typed arrays, many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like URL

We have discovered 28,868 live websites that are using Core JS.

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Technology usage statistics

Websites using Core JS28,868 websites
Most popular in the country RU
Market position in JavaScript Libraries#166
Market penetration in JavaScript Libraries<0.1%
Most popular version3.19.0

Technology adoption

Recent changes in Core JS usage. (See Core JS Usage Changes report)
Websites that added Core JS+5,603
Websites that dropped Core JS-3,894
Websites that changed version of Core JS38

Distribution by websites popularity

Core JS detection in the top websites by popularity
Top 10k sites36 websites
Top 100k sites171 websites
Top 1m sites658 websites

Websites utilizing Core JS

Top websites that use Core JS

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Geographical Distribution

Technology usage distribution by websites across the globe.

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Alternative Names

  • core-js


  • 2 (2 subversions, 9 domains)
  • 3 (40 subversions, 477 domains)