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Updates from 80th TC39 meeting

hemanth profile image Updated on ・2 min read

There were few other items on the agenda, this post focuses only on the proposal updates from the the meeting.

Stage 4:

Stage 3:

Stage 2:

  • Module Blocks: Module blocks are syntax for the contents of a module, which can then be imported.

  • Intl.DisplayNames: enable developers to get translation of language, region or script display names on the client, part of ECMA-402.

  • Intl.DisplayNames V2: A proposal to expose Locale information, such as week data (first day in a week, weekend start day, weekend end day, minimum day in the first week), hour cycle used in the locale, measurement system used in the locale, part of ECMA-402.

Stage 1:

  • async do: async do expressions allow you to introduce an asynchronous context within synchronous code without needing an immediately-invoked async function expression.

  • Class brand check: class.hasInstance a meta method to check whether o have the class brand of C.

  • Extend TimeZoneName Option: Extend the timeZoneName option in Intl.DateTimeFormat object to support more formatted options, part of EMCA 402.

  • eraDisplay: eraDisplay option for Intl.DateTimeFormat eraDisplay option may take 3 values: "never", always", "auto".

  • regex-set-notation: Adopting Unicode behavior for set notation in regular expressions.

  • Escaping Strings for RegExps: escaping a string for use inside a Regular Expression.

  • Array find from last: findLast() and findLastIndex() methods on Array.prototype.

  • lazy-import: defer module import eval.

  • Intl LocaleMatcher: Improve locale negotiation correctness and developer productivity part of ECMA-402.


Discussion (2)

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maxart2501 profile image
Massimo Artizzu

Oooh, I didn't know about async do, but I'd like to see do expressions move forward...

romko391 profile image
Romko • Edited

for the lazy imports I'd suggest using construction like:
defer import { something } from 'module';
as we already have defer attribute in HTML, so it would be easier to memorise.