jquery bind 改变context this指向

Posted by bower on September 18, 2010
javascript,

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http://www.qiongbupa.com/martisd/924 myObject = function(){
this.clicked = false;

source link

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myObject.prototype.click = function(e){
this.clicked = true;
var dom = e.target
}
var myOinstance = new myObject()
$('#myid').bind('click',myOinstance.click);

以上代码OO思想意图不会被实现 ,因为myOinstance.click中的this指向$(‘#myid’)的dom元素,而不是myOinstance
很可惜目前jquery不提供更改this指向或改变context的bind方法,我们要自己做一个扩展。

source url

see url
jQuery.fn.extend({
onbind: function( type,fn, scope ) {
return this.each(function(){
$(this).bind(type, $.proxy(fn,scope))} );
}

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go $('#myid').onbind('click',myOinstance.click,myOinstance);

这样在myOinstance.click中this指向了myOinstance而且e.target可以得到dom元素,

http://www.idfopoitiers.fr/maskoer/2248 return语句很关键,它保持了jquery的链式操作

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