Iterators and the for...of loop
Widely available since 2018-01-29
The for...of loop operates on a sequence of values sourced from an iterable object, such as arrays, array-like objects, DOM collections, iterators, generators, and user-defined iterables. All built-in iterators inherit from the Iterator class.
Learning resources on MDN
Browser support
- Chrome 38 Released on 2014-10-07
- Chrome Android 38 Released on 2014-10-08
- Edge 12 Released on 2015-07-29
- Firefox 13 Released on 2012-06-05
- Firefox for Android 14 Released on 2012-06-26
- Safari 7 Released on 2013-10-22
- Safari on iOS 7 Released on 2013-09-18
Specifications
- ECMAScript® 2026 Language Specification (#sec-%iteratorprototype%-object), from TC39 (Ecma International).
- ECMAScript® 2026 Language Specification (#sec-for-in-and-for-of-statements), from TC39 (Ecma International).
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