If you are using WebStorm with ember-cli, you will need to modify your .gitignore file, enable ECMAScript6 settings, and mark certain directories.
First, add the following line to .gitignore:
.idea
Next, from the WebStorm menu:
File > Settings -> Languages & Frameworks -> JavaScript -> ECMAScript6
Finally, mark specific directories by right clicking on each of the following directories and marking as indicated.
Mark as excluded:
/tmp
/dist
Mark as resource route:
/
/bower_components
/bower_components/ember-qunit/lib
/public
Mark as test sources root:
/tests