Stage 4 tracking

[bakkot]

This proposal achieved stage 3 at the October 2024 meeting. This is a tracking issue for getting stage 4.

• committee consensus
• open PR to the spec - Normative: add Math.sumPrecise ecma262#3654
  • editors have approved the PR
• at least two implementations
  • JavaScriptCore (PR, in tech preview 205 / stable 18.4)
  • V8 (issue)
  • SpiderMonkey (issue, in Firefox 137)
• significant in-the-field experience

[linusg]

Implemented in Kiesel back in April last year: https://codeberg.org/kiesel-js/kiesel/pulls/17

[eliassjogreen]

Implemented in Nova: trynova/nova@feb16d7