Updates from the 84th meeting of TC39

There were several items on the agenda, this post mainly focuses on feature proposals and their progress.

Stage 4:

• Ergonomic Brand Checks for Private Fields: Check if an object has a private field, and if not, have some fallback behavior.

Stage 3:

• Array find from last: Proposal for .findLast() and .findLastIndex() methods on array and typed array.

• Intl Enumeration API List supported values of options in pre-existing ECMA 402 API, returns supported values of options, such as timeZone, calendars, numbering systems, currencies, units.

• Intl.NumberFormat Additional features for Intl.NumberFormat to solve key pain points.

Stage 1:

• ArrayBuffer to/from base64: ArrayBuffer <-> base64 string functions.

Bonus:

Presented at #TC39 meeting about renaming "Strawperson" aka "Stage-0" to "Concept" or something better, got consensus from the committee to remove the entire column.

Well, names might be appealing but numbers are more closer.

Feeling happy about this! 🤓 pic.twitter.com/ED8MwsFEJ6

— Hemanth.HM (@GNUmanth) July 14, 2021