Are ES6 arrow functions incompatible with Angular?

Question

Here\'s a normal ES5 function in my Angular code which works:

app.run(function($templateCache){ $templateCache.put(\'/some\',\'thing\') });

Answer 1

I tried another variation which worked: (x)=>… (instead of x=>…)

app.run(($templateCache) => $templateCache.put('/some','thing'));

I guess it needs parentheses for some reason