elixir - Couldn't find preset "es2015" relative to directory "web/static/js"

Question

I'm trying to build a vagrant server for dabbling with elixir and phoenix, but after installing all requirements and dependencies, and on running mix phoenix.server I'm getting the following error:

error: Compiling of 'web/static/js/app.js' failed. Couldn't find preset "es2015" relative to directory "web/static/js" ;

I'm not sure of the context of 'preset' here, I'm hoping a more seasoned phoenix user will know what it's getting at.

Some cursory Google's gave me nothing, other than it might be something to do with babel.

Edit: I just tried installing what I assume to be the missing package, sudo npm install babel-preset-es2015 -g, but it hasn't resolved the error.

question from:https://stackoverflow.com/questions/34345573/couldnt-find-preset-es2015-relative-to-directory-web-static-js

Answer 1

Please see the fix here: https://github.com/phoenixframework/phoenix/issues/1410

1. Upgrade to node >= v5.0.0
2. npm cache clean
3. cd my_app
4. rm -rf node_modules/
5. npm install
6. mix phoenix.server