How to integrate uglify-es in grunt?

Question

I'm using gruntjs (which uses uglifyjs) to build my Angularjs app. But uglifyjs still does not support es6, so in corresponding GitHub issue i found this. So now there is uglify-es, which seemingly supports es6. But I'm not sure how to integrate it with grunt. Now i have module "grunt-contrib-uglify", which has a dependency uglifyjs, which is now used. How can i make grunt use uglify-es instead?

Masterstroke

Answer 1

2023 UPD: this answer may be outdated, according to some comments. Didn't have time to check

I've achived this by installing the harmony branch of grunt-contrib-uglify, which supports es6:

npm install git://github.com/gruntjs/grunt-contrib-uglify.git#harmony --save-dev

Masterstroke

Is this still the way to use for es6. I tried installing the above module and got a Permission denied on /var/root/.npm/_cacache/tmp/git-clone-5257398a npm ERR! /private/var/root/.npm/_cacache/tmp/git-clone-5257398a/.git I changed the permission to 777 for /var/root/.npm/_cacache/tmp/ but still end up with the error – Noontime

@jitenshah, do you have an error when just installing grunt-contrib-uglify, not specific branch? npm install grunt-contrib-uglify --save-dev – Masterstroke

No. I was able to install it easily. Even though I was in # prompt --> I ran your command with sudo like : sudo npm install git://github.com/gruntjs/grunt-contrib-uglify.git#harmony --save-dev and I was able to get the work done. – Noontime

This answer saved my day. – Helix

its locked and cant be installed – Thread

Answer 2

The ECMAScript version has finally been released. You can now get the same result with the official version (it's no longer needed to pick it from GitHub)

npm install grunt-contrib-uglify-es --save-dev

https://www.npmjs.com/package/grunt-contrib-uglify-es

Killough

Thank you for sharing this :) – Meyerbeer

Though the accepted answer solves the problem, this is the better and stable one than the accepted one, possibly because it is the more up-to-date solution. – Hatchel

It's weird that it says 'This packed has been deprecated' but thx. – Cenotaph

because it is deprecated, it doesnt work for me – Thread