Web platform features explorer - Iterator.concat()

Web platform features explorer

The Iterator.concat() JavaScript method returns an iterator that yields values from a sequence of iterators, exhausting each iterator before moving on to the next.

Status

Limited availability

MDN documentation

Iterator.concat()

Specifications

ECMAScript® 2026 Language Specification (#sec-iterator.concat), from TC39 (Ecma International).

Browser support

Chrome ❌
Chrome Android ❌
Edge ❌
Firefox 147 Released on 2026-01-13
Firefox for Android 147 Released on 2026-01-13
Safari ❌
Safari on iOS ❌

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