A small modification to JavaScript syntax allows trailing comma in formal parameter lists and in argument lists. For example, all the following become valid: function f(a, b,) { return a + b } let g = (a, b,) => a + b f(1, 2,) + g(3, 4,) This is expected to be available by default in Chrome 58.
Specification
Status in Chromium
Enabled by default (tracking bug) in:
- Chrome for desktop release 58
- Chrome for Android release 58
- Android WebView release 58
Consensus & Standardization
After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.
- In development
- Shipped/Shipping
- In development
- No signals
Owner
Last updated on 2020-11-09