missing use strict mode

[daton89]

In client/app/*.js files there isn't the starter "use strict"

in ES6 it is required but there is some reason for which may be missing?

[tytskyi]

@daton89

Module code is always strict mode code.

http://www.ecma-international.org/ecma-262/6.0/#sec-strict-mode-code

Which means you don't need to put it manually

[fesor]

Closing this since @tytskyi already provided right link.