core-js<ref>https://github.com/zloirock/core-js</ref> is the most popular<ref>https://www.npmtrends.com/core-js-vs-core-js-pure-vs-es5-shim-vs-es6-shim-vs-airbnb-js-shims-vs-polyfill-library-vs-polyfill-service-vs-js-polyfills</ref> and powerful<ref>http://kangax.github.io/compat-table/es6/#babel7corejs3</ref> JavaScript [[standard library]] polyfill.{{According to whom|date=November 2020}} Includes polyfills for [[ECMAScript]] up to 20192021: promises, symbols, collections, iterators, typed arrays, many other features, ECMAScript proposals, some cross-platform [[WHATWG]] / [[W3C]] features and proposals like <code>URL</code>. You can load only required features or use it without global namespace pollution. It can be integrated with [[Babel_(compiler)|Babel]], which allows it to automatically inject required core-js modules to your code.
