Functional mixin example

functional-mixin-example.js

import Events from 'eventemitter3';

const rawMixin = function () {
  const attrs = {};

  return Object.assign(this, {
    set (name, value) {
      attrs[name] = value;

      this.emit('change', {
        prop: name,
        value: value
      });
    },

    get (name) {
      return attrs[name];
    }
  }, Events.prototype);
};

const mixinModel = (target) => rawMixin.call(target);

const george = { name: 'george' };
const model = mixinModel(george);

model.on('change', data => console.log(data));

model.set('name', 'Sam');
/*
{
  prop: 'name',
  value: 'Sam'
}
*/

there is a minor typo a :27 consle instead of console

Why you’re using “this” keyword to pass object that should be extended?

What extra benefits does this approach have comparing to using argument for the same purpose?