JavaScript实现为指定对象添加多个事件处理程序的方法

网络编程 2024/11/20 佚名

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本文实例讲述了JavaScript实现为指定对象添加多个事件处理程序的方法。分享给大家供大家参考。具体如下：

如果你希望对象点击的时候同时处理多个事情，可以使用下面的代码

/* Start of the multihandle Object...*/
function MultiHandle(owner){
 var my_handlers = new Array();
 var my_owner = owner;
 this.append = function(handler){
  my_handlers[my_handlers.length] = handler;
 }
 this.fire = function(evt){
  var i;
  for(i = 0; i < my_handlers.length; i++){
   my_owner.tempspace = my_handlers[i];
   my_owner.tempspace(evt);
  }
 }
}
/* End of the multihandle object*/
/* start of the object add event handler script */
 
/*This bit goes where you'd normally write...
... object.onmouseup = [event handler]...
... where [event handler] is an existing function ...
... that handles an event, or even an
... anonymous function.*/
if(typeof(MultiHandle) != "undefined"){
 var mup_handler = object.mh_onmouseup;
 if(!mup_handler){
  mup_handler = new MultiHandle(object);
  object.mh_onmouseup = mup_handler;
  object.onmouseup = function(evt){
  this.mh_onmouseup.fire(evt);
  };
 }
 mup_handler.append([event handler]);
}else{
 object.onmouseup = [event handler];
}

希望本文所述对大家的javascript程序设计有所帮助。

JavaScript,指定对象,添加,多个事件处理