Syntax of fat arrow functions (=>), to use or not to use {} around the body

Question

I am looking at this code - https://facebook.github.io/react-native/docs/network.html

return fetch(\'https://facebook.github.io/react-native/movies.json\')
          


        

Answer 1

(foo) => 'bar';

does exactly the same thing as

(foo) => {
  return 'bar';
};

If your function is multiline, use the second form.

Here are some docs: MDN Arrow function