Intent to Ship: Math.sumPrecise

[Chromestatus]

Contact emails

ol...@google.com

Specification

https://github.com/tc39/proposal-math-sum

Summary

A TC39 proposal to add a method to sum multiple values to JavaScript. Add an iterable-taking `Math.sumPrecise` method which returns the sum of the values in the iterable using a more precise algorithm than naive summation.

Blink component

Blink>JavaScript>Language

Web Feature ID

math-sum-precise

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

WebKit: Shipped/Shipping

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?

Yes
Covered by Test262

Flag name on about://flags

No information provided

Finch feature name

V8Flag_js_sum_precise

Rollout plan

Will ship enabled for all users

Requires code in //chrome?

False

Tracking bug

https://issues.chromium.org/u/1/issues/374310075

Estimated milestones

Shipping on desktop

147

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/4790090146643968?gate=5775444731363328

This intent message was generated by Chrome Platform Status.

[Yoav Weiss (@Shopify)]

On Mon, Feb 23, 2026 at 1:27 PM Chromestatus <ad...@cr-status.appspotmail.com> wrote:

Contact emails

ol...@google.com

Specification

https://github.com/tc39/proposal-math-sum

Summary

A TC39 proposal to add a method to sum multiple values to JavaScript. Add an iterable-taking `Math.sumPrecise` method which returns the sum of the values in the iterable using a more precise algorithm than naive summation.

Blink component

Blink>JavaScript>Language

Web Feature ID

math-sum-precise

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

WebKit: Shipped/Shipping

Any links to announcements/bugs/passing test results?

 

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[Yoav Weiss (@Shopify)]

LGTM1

On Mon, Feb 23, 2026 at 2:15 PM Olivier Flückiger <ol...@google.com> wrote:

Thanks, I updated the status entry with

* https://bugs.webkit.org/show_bug.cgi?id=295806

* https://bugzilla.mozilla.org/show_bug.cgi?id=1943120

*oli

[Vladimir Levin]

LGTM2

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOmohSK7q8_2o_L-EtgihS5fdghqecjko5s%3D%2BQgO1VhE4efdhQ%40mail.gmail.com.

[Olivier Flückiger]

Thanks, I updated the status entry with

* https://bugs.webkit.org/show_bug.cgi?id=295806

* https://bugzilla.mozilla.org/show_bug.cgi?id=1943120

*oli

On Mon, Feb 23, 2026 at 2:03 PM Yoav Weiss (@Shopify) <yoav...@chromium.org> wrote:

[Mike Taylor]

LGTM3

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADsXd2Op%3DLsKxuA6%2Bh2gEhH3j6ns0idFydrE2hgf-RRA0_hgkA%40mail.gmail.com.