Champions: Sam Goto (@samuelgoto), Rick Waldron (@rwaldron)
Spec Repo: https://github.com/tc39/proposal-numeric-separator
Moved to Stage 1 at the May 2017 meeting: https://github.com/tc39/agendas/blob/master/2017/05.md
Moved from Stage 1 to Stage 2 at the July 2017 meeting: https://github.com/tc39/agendas/blob/master/2017/07.md
Moved to Stage 3 at the Nov 2017 meeting: https://github.com/tc39/agendas/blob/master/2017/11.md
Update at May 2018 meeting: https://github.com/tc39/agendas/blob/master/2018/05.md

Syntax

let budget = 1_000_000_000_000;
let nibbles = 0b1010_0001_1000_0101;
let message = 0xA0_B0_C0;

Implementation

• NumberLiteralSeparator: Stage 1 feature plugin. Closes gh-538 babylon#541, Support for NumericLiteralSeparator, Stage 1 feature babel#5793
• First released in https://github.com/babel/babel/releases/tag/v7.0.0-alpha.11
• Check the Spec: Numeric Separator label in Babylon
• https://babeljs.io/7/
• updating to Stage 2 preset in Add numeric separator to stage 2 preset babel#6071