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是否有办法在退约中保留这一提法?
原标题:Is there a way to keep this referenced in a callback?

很难用言语解释,但这里我经常在我的法典中解释:

var self_reference;
self_reference = this;

$(selector).bind( event , function() {
  self_reference.someFunction();
});

是否有办法写道,不需要一种临时变量(自称此处参考)?

问题回答

No, there isn t.

。 除非你复印件,否则会丢失。

$(selector).bind( event , (function() {
  this.someFunction();
}).bind(this));

Function.prototype.bind是ES5延伸到功能。

您可使用_.bind ,作为交叉浏览器替代或使用

$(selector).bind( event , (_.bind(function() {
  this.someFunction();
}, this));

$(selector).bind( event , ($.proxy(function() {
  this.someFunction();
}, this));

You could take a look at the jQuery proxy function.

e.g.

$.getJSON(url, $.proxy(function()
{
  // this has now got the desired context
}, this));




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