Q:

What is the difference between () => {} and function() {} in react-native javascript?

I have seen some functions defined as function(){} and some functions defined as () => {}.
Is this related to Javascript version ES6?
Also, how does use of this keyword change from one function definition to another?

A:

The () => {} is called an arrow function. They are, as you said, part of ES6. From the linked page:

An arrow function expression has a shorter syntax compared to function expressions and lexically binds the this value (does not bind its own this, arguments, super, or new.target). Arrow functions are always anonymous.

