jquery防止重复的函数分配 [英] jquery prevent duplicate function assigned
问题描述
如果我需要动态分配点击功能,是否有一种方法可以确保点击功能只分配一次而不重复?
If I need to assign a click function dynamically, is there a way to ensure the click function is only assigned once and not duplicated?
this.click(function(){
alert('test');
})
$ b b
推荐答案
您可以在再次绑定点击事件之前解除绑定,这样您只会有一个事件附加到它:
You can unbind the click event before you bind it again, that way you will only have one event attached to it:
//assuming this is a jquery object.
this.unbind("click");
this.click(function(){
alert("clicked once");
});
从jQuery 1.7开始,点击现在使用.on( http://api.jquery.com/click/ ),以便正确的代码现在
As of jQuery 1.7, click now uses .on (http://api.jquery.com/click/) so the correct code is now
//assuming this is a jquery object.
this.off("click");
this.click(function(){
alert("clicked once");
});
这将解除所有点击事件(包括您可能使用的任何插件创建的点击事件)。要确保您只解除绑定事件使用命名空间。 ( http://api.jquery.com/off/ )
This will unbind all click events (including ones created by any plugins you might be using). To make sure you only unbind your event use namespaces. (http://api.jquery.com/off/)
//assuming this is a jquery object.
this.off("click.myApp");
this.on("click.myApp", function(){
alert("clicked once");
});
这里的myApp是命名空间。
Here myApp is the namespace.
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