core-js
Standard Library
Tech stack & purpose
Core-js is a modular standard library for JavaScript that provides polyfills for ECMAScript features up to 2026, including promises, symbols, collections, iterators, typed arrays, and ECMAScript proposals, as well as some WHATWG and W3C features. The project allows developers to load only required features or use polyfills without polluting the global namespace. Core-js is built in JavaScript and distributed as multiple packages: the main core-js library, core-js-pure (for non-global usage), core-js-bundle (a pre-bundled global version), core-js-builder (for custom bundle generation), and core-js-compat (which provides compatibility data and APIs for determining required modules via browserslist queries). The project is maintained by an individual developer and is community-funded through Open Collective, Patreon, and other donation methods.
Languages
Contributors (top 30 of 146)
- Denis Pushkarev6,817 commits
- rock579 commits
- zloirock97 commits
- Sergey Nechaev90 commits
- Nicolò Ribaudo18 commits
- Basix18 commits
- Levi Pesin16 commits
- Romeo Van Snick16 commits
- weijianfan15 commits
- C. Scott Ananian10 commits
- Sch10 commits
- John9 commits · 0 followers
- Oliver Hoffmann6 commits
- Minseok Choe6 commits
- Nick Etson5 commits
- Andrei Rybak5 commits
- Chi Vinh Le5 commits
- Luashine4 commits
- Ferdinand Thiessen4 commits
- Scott Arciszewski4 commits
- Divyansh Singh3 commits
- Alex3 commits · 18 followers
- Funklos3 commits
- Kenta Moriuchi3 commits
- Ildar Shaimordanov3 commits
- Sergey Sch3 commits
- Logan Smyth3 commits
- zhangenming2 commits
- arcde402 commits
- April Arcus2 commits
