Intent to Ship: Upsert

[Chromestatus]

Contact emails

ol...@google.com

Specification

https://github.com/tc39/proposal-upsert

Summary

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

Blink component

Blink>JavaScript>Language

Web Feature ID

getorinsert

Motivation

No information provided

Initial public proposal

No information provided

TAG review

No information provided

TAG review status

Not applicable

Risks

Interoperability and Compatibility

No information provided

Gecko: Shipped/Shipping (https://www.firefox.com/en-US/firefox/144.0/releasenotes) 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.

WebKit: Shipped/Shipping (https://developer.apple.com/documentation/safari-release-notes/safari-18_4-release-notes) Added support for Map.prototype.getOrInsert and WeakMap.prototype.getOrInsert. (138955824)

Web developers: No signals

Other signals:

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?

No information provided

Debuggability

No information provided

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?

No

Is this feature fully tested by web-platform-tests?

No
https://github.com/tc39/test262/pull/4454

Flag name on about://flags

--js-flags=--js_upsert

Finch feature name

V8Flag_js_upsert

Rollout plan

Will ship enabled for all users

Requires code in //chrome?

False

Tracking bug

https://issues.chromium.org/u/1/issues/434977728

Estimated milestones

Shipping on desktop	145
DevTrial on desktop	143
Shipping on Android	145
DevTrial on Android	143

Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way).

No information provided

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5201653661827072?gate=6583456041664512

This intent message was generated by Chrome Platform Status.

[Daniel Bratell]

LGTM1

/Daniel

--
You received this message because you are subscribed to the Google Groups "blink-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+...@chromium.org.
To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/692eb5f4.050a0220.107b62.1348.GAE%40google.com.