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Upsert

Category

JavaScript

Type

Chromium catches up

Status

Proposed (Chrome Proposed)

Intent stage

None

Summary

ECMAScript proposal for Map.prototype.getOrInsert, Map.prototype.getOrInsertComputed, WeakMap.prototype.getOrInsert, and WeakMap.prototype.getOrInsertComputed.

Standards & signals

• Specification: https://github.com/tc39/proposal-upsert
• Firefox: Shipped/Shipping — Firefox now supports the upsert proposal. This adds getOrInsert and getOrInsertComputed methods to Map and WeakMap. These methods either return the value associated with a key, or insert a default value, and then return that value, simplifying handling of cases where it's not known if a key is already present in the Map or WeakMap.
• Safari: Shipped/Shipping — Added support for Map.prototype.getOrInsert and WeakMap.prototype.getOrInsert. (138955824)
• Web developers: No signals
• Tracking bug: https://issues.chromium.org/u/1/issues/434977728

View on chromestatus.com