Iterator.concat()
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
Specifications
- ECMAScript® 2026 Language Specification (#sec-iterator.concat), from TC39 (Ecma International).
Browser support
- Chrome 146 Released on 2026-03-10
- Chrome Android 146 Released on 2026-03-10
- Edge 146 Released on 2026-03-13
- Firefox 147 Released on 2026-01-13
- Firefox for Android 147 Released on 2026-01-13
- Safari ❌
- Safari on iOS ❌
Baseline availability blocked since March 2026 by Safari (0 months)
Developer votes
Do you need this feature?
Let us know by leaving a 👍 reaction on the feedback issue. Don't forget to also leave a comment explaining your specific use case.
View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist