Before you stop reading this post because the title says 2015 I wanted to let you know that this guide starts on new features implemented in ECMAScript 2015 because this version was a big step from the previous one (ECMAScript 2009) Also new features implemented in ES2015 are the standard used in current technology and new versions of the standard are develop based on ECMAScript 2015. In any case I’m always trying to keep the guide updated with new features implemented in most recent versions.
