cloud/client/winsoft/win-transfer-data/index.js

module.exports = global.broadcaster = {
    _events: {},
    publish: function (event, data) {
        if (!this._events[event]) return; // no one is listening to this event
        for (var i = 0; i < this._events[event].length; i++)
            this._events[event][i](data);
    },
    subscribe: function (event, callback) {
        if (!this._events[event]) this._events[event] = []; // new event
        this._events[event].push(callback);
    },
    clear: function(event){
        if (this._events[event]) delete this._events[event];
    }

};