ECMAScript 1 - 6 is fully supported in all modern browsers.
Browser Support for ES5 (2009)
| Browser | Version | From Date |
|---|---|---|
| Chrome | 23 | Nov 2012 |
| Firefox | 21 | May 2013 |
| IE | 9* | Mar 2011 |
| IE / Edge | 10 | Sep 2012 |
| Safari | 6 | Jul 2012 |
| Opera | 15 | Jul 2013 |
* Internet Explorer 9 does not support ECMAScript 5 "use strict".
Browser Support for ES6 (2015)
| Browser | Version | Date |
|---|---|---|
| Chrome | 51 | May 2016 |
| Firefox | 52 | Mar 2017 |
| Edge | 14 | Aug 2016 |
| Safari | 10 | Sep 2016 |
| Opera | 38 | Jun 2016 |
Internet Explorer does not support ECMAScript 2015.
Browser Support for ECMAScript 2016
| Browser | Version | Date |
|---|---|---|
| Chrome | 52 | Jul 2016 |
| Firefox | 54 | Jun 2017 |
| Edge | 14 | Aug 2016 |
| Safari | 10.1 | Mar 2017 |
| Opera | 39 | Aug 2016 |
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