The arrow functions at first might seem confusing (for me (◕(◕) ), but after a while, you can understand their shorter syntax and the magic of the scope of this.
Multiple parameters
Without arrow functions.
With arrow functions.
Or in a shorter way.
Only one parameter
Without arrow functions.
With arrow functions.
Scope
Without arrow functions.
With arrow functions.
Example with map
Without arrow functions.
With arrow functions.
Here you can find a JS Bin with the examples.