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Updates from the 98th TC39 meeting

There were several items on the agenda, this post focuses on feature proposals and their progress from the 97th TC39 meeting [26-28 September 2023].

Stage 4:

Sage 2:

  • ShadowRealm: ECMAScript Proposal, specs, and reference implementation for Realms [Stage 3 -> 2].

  • RegExp.escape: Proposal for investigating RegExp escaping for the ECMAScript standard.

Stage 1:


  • FinalizationRegistry#cleanupSome: This method was planning to enable library authors to clean up without yielding to the event loop.

  • Symbol.thenable: Was planning to avoid thenable behavior, a modifier should be added to an object for Promise.resolve awareness.


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