Intent to Ship: Ergonomic brand checks for private fields

[Marja Hölttä]

Contact emails

ma...@chromium.org, s...@chromium.org

Explainer

None

Specification

https://github.com/tc39/proposal-private-fields-in-in

Summary

This JavaScript feature adds the capability for testing the existence of a private field in an object: "#foo in obj" Proposal: https://github.com/tc39/proposal-private-fields-in-in The feature has reached Stage 3 in TC39.

Blink component

Blink>JavaScript>Language

TAG review

None

TAG review status

Not applicable

Risks

Interoperability and Compatibility

Gecko: No signal This is a minor, uncontroversial TC39 stage 3 feature.

WebKit: No signal This is a minor, uncontroversial TC39 stage 3 feature.

Web developers: No signals N/A. This is a minor, uncontroversial TC39 stage 3 feature.

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

No

This feature is currently tested by V8 tests and will later be tested by test262.

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5006138707804160

This intent message was generated by Chrome Platform Status.

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[yo...@yoav.ws]

On Friday, February 19, 2021 at 9:36:31 AM UTC+1 Marja Hölltä wrote:

Contact emails

ma...@chromium.org, s...@chromium.org

Explainer

None

Specification

https://github.com/tc39/proposal-private-fields-in-in

Summary

This JavaScript feature adds the capability for testing the existence of a private field in an object: "#foo in obj" Proposal: https://github.com/tc39/proposal-private-fields-in-in The feature has reached Stage 3 in TC39.

Blink component

Blink>JavaScript>Language

TAG review

None

TAG review status

Not applicable

Risks

Interoperability and Compatibility

Gecko: No signal This is a minor, uncontroversial TC39 stage 3 feature.

WebKit: No signal This is a minor, uncontroversial TC39 stage 3 feature.

Have we reached out? bit.ly/blink-signals

[Mike West]

LGTM1.

We've considered TC39's Stage 3 to be substantive support from that group's participants in the past. I think it's pretty reasonable to consider it to be that here as well.

-mike

[Chris Harrelson]

LGTM2, but I agree with Yoav that you should also file for signals, if for no other reason that it's an FYI and encouragement for everyone to ship consensus JS features in lock step. Appreciate your help.

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[Alex Russell]

LGTM3 modulo Chris and Yoav's note.