ECMAScript 6 is also called ECMAScript 2015.
ECMAScript 7 is also called ECMAScript 2016.
ECMAScript 7 is also called ECMAScript 2016.
Browser Support
ECMAScript 3 is fully supported in all browsers.ECMAScript 5 is fully supported in all modern browsers*.
ECMAScript 6 is partially supported in all modern browsers.
ECMAScript 7 is poorly supported in all browsers.
ECMAScript Browser Implementations
| Engine | ECMA | Browser |
|---|---|---|
| V8 | 6 | Chrome (Partial Support) |
| SpiderMonkey | 6 | Firefox (Partial Support) |
| Chakra | 6 | Edge (Partial Support) |
| Nitro | 6 | Safari (Partial Support) |
| V8 | 6 | Opera (Partial Support) |
| V8 | 5 | Chrome 23 |
| SpiderMonkey | 5 | Firefox 21 |
| JavaScript 1.8.5 | 5 | Firefox 4 |
| Nitro | 5 | Safari 6 |
| V8 | 5 | Opera 15 |
| Chakra | 5 | Edge 12 |
| Chakra | 5 | IE 10 |
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