Feature request: Numeric Separators

[jpodeszfa]

https://github.com/tc39/proposal-numeric-separator

example:

const test = 1_000_000;

jshint result:
Problem at line 1 character 14: Unexpected '1'.

It is supported by all major browsers:
https://caniuse.com/mdn-javascript_grammar_numeric_separators

[jugglinmike]

Sounds good. Any chance you want to give it a shot?

By the way, this project's criteria for supporting new JavaScript language features is based on the standardization process, not the implementation status.. Numeric separators became fair game for us when it entered "Stage 2" of TC-39's standardization process.

[almercier]

@jugglinmike Since this has reached stage 4 and is officially part of ECMAScript 12 (2021), would it be better to set up a feature branch first that encapsulates the various changes needed for ES12 support? Similar to how you handled ES11 with the v2.13 feature branch #3486?

I imagine there could be an issue where multiple PRs both would try to add the ES12 setting, whereas it could all be setup beforehand in the feature branch.

[Giszmo]

Two years on JSHint still wants me to not use Numeric Separators :(

[Joxter]

one more year:(