Created
June 1, 2015 16:02
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pubsub模式-【典型版】
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Document</title> | |
| </head> | |
| <body> | |
| <button id="count">点我</button> | |
| <div id="show"></div> | |
| <script type="text/javascript"> | |
| var Event = (function() { | |
| var clientList = {}, | |
| listen, | |
| trigger, | |
| remove; | |
| listen = function(key, fn) { | |
| if (!clientList[key]) { | |
| clientList[key] = []; | |
| } | |
| clientList[key].push(fn); | |
| }; | |
| trigger = function(){ | |
| var key = Array.prototype.shift.call(arguments), | |
| fns = clientList[key]; | |
| if(!fns || fns.length ===0){ | |
| return false; | |
| } | |
| for (var i = 0,fn; fn=fns[i++];) { | |
| fn.apply(this,arguments); | |
| } | |
| }; | |
| remove = function(key,fn){ | |
| var fns = clientList[key]; | |
| if (!fns) { | |
| return false; | |
| } | |
| if(!fn){ | |
| fns && (fns.length ===0); | |
| }else{ | |
| for (var l = fns.length-1;l>=0; l--) { | |
| var _fn = fns[l]; | |
| if(_fn === fn){ | |
| fns.splice(1,1); | |
| } | |
| } | |
| } | |
| }; | |
| return { | |
| listen:listen, | |
| trigger:trigger, | |
| remove:remove | |
| }; | |
| })(); | |
| var a = (function(){ | |
| var count = 0; | |
| var button = document.getElementById('count'); | |
| button.onclick = function(){ | |
| Event.trigger('add',count++); | |
| }; | |
| }()); | |
| var b = (function(){ | |
| var div =document.getElementById('show'); | |
| Event.listen('add',function(count){ | |
| div.innerHTML = count; | |
| }); | |
| }()); | |
| </script> | |
| </body> | |
| </html> |
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