events.js

'use strict';

function plugin(Vue) {

    if (plugin.installed) {
        return;
    }

    var events = new Vue({
        methods: {
            fire: function fire(name) {
                var data = arguments.length <= 1 || arguments[1] === undefined ? null : arguments[1];

                this.emit(name, data);
            },
            emit: function emit(name) {
                var data = arguments.length <= 1 || arguments[1] === undefined ? null : arguments[1];

                this.$emit(name, data);
            },
            listen: function listen(name, cb) {
                this.on(name, cb);
            },
            on: function on(name, cb) {
                this.$on(name, cb);
            }
        }
    });
    Object.defineProperty(Vue.prototype, '$events', {
        get: function get() {
            return events;
        }
    });
}
if (typeof window !== 'undefined' && window.Vue) {
    window.Vue.use(plugin);
}