Stage 1
Classification: API Change
Human Validated: KW
Title: of and from on collection constructors
Authors: Leo Balter
Champions: Leo Balter
Last Presented: September 2016
Stage Upgrades:
Stage 1: 2017-05-21
Stage 2: NA
Stage 2.7: NA
Stage 3: NA
Stage 4: NA
Last Commit: 2019-10-22
Topics: collections objects iterators
Keywords: collection constructors sets maps iterator
GitHub Link: https://github.com/tc39/proposal-setmap-offrom
GitHub Note Link: https://github.com/tc39/notes/blob/HEAD/meetings/2016-09/sept-29.md#11iic-set-map-weakset-and-weakmap-of-and-from-methods

Proposal Description:

`of` and `from` on collection constructors

This proposal is currently stage 1 of the TC39 process.

A polyfill is available in the core-js library. You can find it in the ECMAScript proposals section.