JavaScript (initial core language support)
JavaScript is a programming language that runs in browsers, usually through the <script> element. JavaScript has changed over many years. This feature represents the oldest language features, such as built-in objects, statements, and operators. Also known as ECMAScript.
Status
Baseline Widely Available (since 2018-01-29)
MDN documentation
Specifications
- ECMAScript® 2026 Language Specification (#sec-intro), from TC39 (Ecma International).
Browser support
- Chrome 5 Released on 2010-05-25
- Chrome Android 18 Released on 2012-06-27
- Edge 12 Released on 2015-07-29
- Firefox 1 Released on 2004-11-09
- Firefox for Android 4 Released on 2011-03-29
- Safari 5 Released on 2010-06-07
- Safari on iOS 4.2 Released on 2010-11-22
View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist