Web platform features explorer - Map getOrInsert()

Web platform features explorer

The getOrInsert() and getOrInsertComputed() methods of Map objects get a value, setting and getting a default value if needed.

Status

Limited availability

MDN documentation

Specifications

Upsert, from TC39 (Ecma International).

Browser support

Chrome ❌
Chrome Android ❌
Edge ❌
Firefox 144 Released on 2025-10-14
Firefox for Android 144 Released on 2025-10-14
Safari ❌
Safari on iOS ❌

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