Updates from the 101th TC39 meeting

#javascript

There were several items on the agenda, this post focuses on feature proposals and their progress from the 101th TC39 meeting [8-11th April 2024].

Stage 1:

Error.isError: Error.isError tests if a value is an Error instance, irrespective of its Realm origin.
Signals: A declarative programming model for updating based on changes to state.
Strict using: Proposal to mandate the use of using for certain resources.

Stage 2.7:

Math.sumPrecise: summation method.
Promise.try: an ergonomic, readable, and intuitive way to invoke a function and always get a Promise.

Stage 3:

Redeclarable global eval-introduced vars: Make eval-introduced global vars redeclarable.
Dynamic code brand checks:Flexible brand checks before dynamic code loading.

Stage 4:

Set Methods: New Set methods
Duplicate named capture groups: allow regex capturing group names to be repeated

Hemanth HM

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