解决react和其他框架之间的交互问题

import EventEmitter from 'eventemitter3';

 拓展

1.只触发一次

EventEmitter.prototype.once = function(events,handler){
    // no events,get out!
    if(! events)
        return; 
 
    // Ugly,but helps getting the rest of the function 
    // short and simple to the eye ... I guess...
    if(!(events instanceof Array))
        events = [events];
 
    var _this = this;
 
    var cb = function(){
        events.forEach(function(e){     
            // This only removes the listener itself 
            // from all the events that are listening to it
            // i.e.,does not remove other listeners to the same event!
            _this.removeListener(e,cb); 
        });
 
        // This will allow any args you put in xxx.emit('event',...) to be sent 
        // to your handler
        handler.apply(_this,Array.prototype.slice.call(arguments,0));
    };
 
    events.forEach(function(e){ 
        _this.addListener(e,cb);
    }); 
};