간단한 프런트엔드 이벤트 프레임워크

    
        
        
        
        
    
    
        
js event demo
    
    

        <span style="color: #008000;">//</span><span style="color: #008000;"> </span>
        <span style="color: #0000ff;">function</span><span style="color: #000000;"> EventEmitter() {
            </span><span style="color: #0000ff;">this</span>.events =<span style="color: #000000;"> {};
        }   

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> </span>
        EventEmitter.prototype.on = <span style="color: #0000ff;">function</span><span style="color: #000000;">(ename, call){
            </span><span style="color: #0000ff;">this</span>.events[ename] = <span style="color: #0000ff;">this</span>.events[ename] ||<span style="color: #000000;"> [];
            </span><span style="color: #0000ff;">this</span><span style="color: #000000;">.events[ename].push(call);
        }

        EventEmitter.prototype.emit </span>= <span style="color: #0000ff;">function</span><span style="color: #000000;">(ename, _){


            </span><span style="color: #0000ff;">var</span> events = <span style="color: #0000ff;">this</span><span style="color: #000000;">.events[ename];
            </span><span style="color: #008000;">//</span><span style="color: #008000;"> ， ename</span>
            <span style="color: #0000ff;">var</span> args   = Array.prototype.slice.call(arguments, 1<span style="color: #000000;">);

            </span><span style="color: #0000ff;">for</span>(<span style="color: #0000ff;">var</span> i = 0; i < events.length; i++<span style="color: #000000;">){
                
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> </span>
                events[i].apply(<span style="color: #0000ff;">null</span><span style="color: #000000;">, args);
            }
        }

        </span><span style="color: #0000ff;">function</span><span style="color: #000000;"> app(){

            calltime </span>= 0<span style="color: #000000;">;

            </span><span style="color: #008000;">//</span><span style="color: #008000;"> </span>
            <span style="color: #0000ff;">this</span>.on('start',<span style="color: #0000ff;">function</span><span style="color: #000000;">(user, date){
                calltime </span>+= 1<span style="color: #000000;">;
                console.log(</span>'event start: ' + user + " " + date + " " +<span style="color: #000000;"> calltime);
            });

            </span><span style="color: #0000ff;">this</span>.on('start', <span style="color: #0000ff;">function</span><span style="color: #000000;">(user, date){
                calltime </span>+= 1<span style="color: #000000;">;
                console.log(</span>'event start: ' + user + " " + date + " " +<span style="color: #000000;"> calltime);
            })
        }


        app.prototype </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> EventEmitter();

        </span><span style="color: #0000ff;">var</span> a = <span style="color: #0000ff;">new</span><span style="color: #000000;"> app();
        
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> </span>
        a.emit('start', 'fred', <span style="color: #0000ff;">new</span><span style="color: #000000;"> Date());

    </span>