Functions
Widely available since 2018-01-29
Functions are series of statements that can be called and return a value. The function keyword (as in function () { }) and arrow (=>) expression create functions. The JavaScript functions protocol includes default and rest parameters and binding to this.
Learn more
Specifications
- ECMAScript® 2026 Language Specification (#sec-ecmascript-language-functions-and-classes), from TC39 (Ecma International).
- ECMAScript® 2026 Language Specification (#sec-function-objects), from TC39 (Ecma International).
Browser support
- Chrome 1 Released on 2008-12-11
- 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 1 Released on 2003-06-23
- Safari on iOS 1 Released on 2007-06-29
View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist