Support for ECMA script 6

[mkappelhof]

When compiling my code with ECMA script 6 class definitions class ClassName{ [code] } i get the following:

Warning: Uglification failed.
Unexpected token: name (ClassName).
Line 1 in script.js

I've read your comment here here, so is it an option (don't really know how these things work) to add uglify-js-es6 to this wrapper?

[alexlamsl]

Closing as duplicate of #480 - please use harmony branch for ES6 support, which depends on uglify-es.

[mkappelhof]

Works perfect! Thx

[FromStoneage]

can we get this change to master? for those that rely on ES6 support every time the master branch updates the harmony's rebase caused shrinkwrap unable to find the dependency and we have to fix the build.

What's preventing this feature to be merged to master?

[jakubboucek]

• Package grunt-contrib-uglify-es is now deprecated,
• Branch #harmony is more than 2 years old,
• Current version of this plugin is using uglify-js v3.5.0 which is still support only ES5.

Is here any stable & non-deprecated way to uglify ES6 now?

[nise]

Are there any updates?

[ImLoaD]

Branch #harmony is more than 3 years old,
Any updates?

[ShakMR]

Branch #harmony is more than 3 years old,
Any updates?

just in case someone finds this issue first, it is deprecated and we should be using terser instead. See:
#541

[alexlamsl]

Incorrect − current version of uglify-js supports latest version of ECMAScript, so using grunt-contrib-uglify without the harmony branch is sufficient.

[ShakMR]

@alexlamsl you are right. Sorry, ignore my comment.

I went only over the changelog. I think this is important enough to be stated there explicly. Issue here for reference: #554