Emiting custom events on plain object.

script.js

require([
    'dojo/on',
    'dojo/Evented',
    'dojo/_base/lang'
], function (
    on,
    Evented,
    lang
) {
    'use strict';

    var plainObject = {
        foo: 'bar'
    };

    lang.mixin(plainObject, Evented.prototype);

    on(plainObject, 'some-custom-event', function () {
        console.log('Event!')
    });

    on.emit(plainObject, 'some-custom-event');

});