jquery 函数中的 this.element 是什么？
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what is this.element in a jquery function?
提问by esther h
I was reading an excellent explanation of the jQuery UI combobox by J?rn Zaefferer (here's the link).
我正在阅读 J?rn Zaefferer 对 jQuery UI 组合框的出色解释（这是链接）。
The fourth line of code reads var select = this.element.hide()
第四行代码读取 var select = this.element.hide()
J?rn says:
J?rn 说：
The var select references the select element on which the combobox gets applied. To replace the select with the text input, the select is hidden.
var select 引用应用组合框的 select 元素。要将选择替换为文本输入，选择是隐藏的。
I am learning jQuery now, and I don't recall seeing this.elementbefore. How is it different that just this?
我现在正在学习 jQuery，我不记得以前看过this.element。只是这个有什么不同？
回答by Dima Koderov
Inside a widget, "this" refers to the widget object itself, which contains a property "element". That "element" points to html element for which that widget has been applied.
在小部件内部，“this”指的是小部件对象本身，它包含一个属性“元素”。该“元素”指向应用了该小部件的 html 元素。
回答by Rezigned
You can think of it like this.
你可以这样想。
this.element // is just normal jquery object
// for example
var element = $('.current-selected-dropdown');
// and then put this together inside ui object
this.element = element
I'm not sure if this would help you.
我不确定这是否对你有帮助。
var Dropdown = {
element: null,
_init: function() {
// here is the same this.element that you referred to.
this.element = $('.dropdown');
}
}
回答by Amit
The this being referred here is probably not the query object, and this.element has been used to cache the query object.
这里引用的this可能不是查询对象，this.element已经被用来缓存查询对象了。
