Methods in ES6 objects: using arrow functions https://stackoverflow.com/a/31095976/2002514 #gogofast

0-arrow-functions.txt

Arrow functions are not designed to be used in every situation merely as a shorter version of old-fashioned functions. The most common use case for arrow functions is as short "lambdas" which do not redefine this, often used when passing a function as a callback to some function.

Arrow functions cannot be used to write object methods because, as you have found, since arrow functions close over the this of the lexically enclosing context, the this within the arrow is the one that was current where you defined the object.

1-arrow-functions.js

// Whatever `this` is here...
var chopper = {
  owner: 'Zed',
  getOwner: () => {
    return this.owner; // ...is what `this` is here.
  }
};

// Good
var chopper = {
  owner: 'Zed',
  getOwner() {
    return this.owner;
  }
};