Custom Errors in ES6 (ES2015)

A very quick note. With the new class and extend keywords it’s now much easier to subclass Error constructor:

class MyError extends Error {
  constructor(message) {
    super(message);
    this.message = message;
    this.name = 'MyError';
  }
}

There is no need for this.stack = (new Error()).stack; trick thanks to super() call.