After the release of ECMAScript 2015, a.k.a. ES6, the ECMAScript Language Specification is evolving rapidly: it’s getting many new features that will help developing web applications, with a new release planned every year. Last week, Firefox Nightly 54 reached 100% on the Kangax ECMAScript 2016+ compatibility table that currently covers ECMAScript 2016 and the ECMAScript 2017 draft. Here are some
![ECMAScript 2016+ in Firefox](https://cdn-ak-scissors.b.st-hatena.com/image/square/97f51babb424b865cf32a087abd5e44b76964eb5/height=288;version=1;width=512/https%3A%2F%2Fblog.mozilla.org%2Fjavascript%2Fwp-content%2Fthemes%2FOneMozilla%2Fimg%2Fmozilla-wordmark.png)