blocks|key|1955151|text|将$(this)保存在实例that的某个变量中，稍后在animate中使用|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1955152|$("div.someClass").each(function+(index)+{
++$(this).click(function+()+{
++++alert($(this).attr("id"));+//+Here+i+get+the+actually+clicked+element
++++var+that+=+$(this);
++++$.when($("div.someClass").animate({+},+0)).then(function+()+{+++++++++++
++++++alert(that.attr("id"));+//+Here+i+get+the+first+element+in+of+that+class
++++++alert($(this).attr("id"));+
++++});
++});
});|code-block|syntax|javascript|1955153|entityMap^0|1|7|D|4|R|7|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

Save the <code>$(this)</code> in some variable for instance <code>that</code> and later use in <code>animate</code> 

<pre><code>$("div.someClass").each(function (index) {
 $(this).click(function () {
 alert($(this).attr("id")); // Here i get the actually clicked element
 var that = $(this);
 $.when($("div.someClass").animate({ }, 0)).then(function () { 
 alert(that.attr("id")); // Here i get the first element in of that class
 alert($(this).attr("id")); 
 });
 });
});
</code></pre>

blocks|key|3592139|text|每次调用函数时，this的值都会自动更改。因此，除非多个函数调用合谋故意保留this的特定值，方法是传入该值，然后在调用回调之前使用.apply()或.call()对其进行设置，否则就会有所不同。Javascript遵循以下规则：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3592140|3592141|如果进行方法调用，则this的值将设置为其方法所在的对象。|unordered-list-item|3592142|如果进行正常的函数调用，则将this设置为全局对象(通常为window)。|3592143|如果使用fn.apply()或fn.call()，则根据第一个参数设置this。|3592144|3592145|最简单的解决方案是将this的值保存在一个局部变量中，然后引用该变量。|3592146|$("div.someClass").each(function+(index)+{
++var+self+=+$(this);
++self.click(function+()+{
++++alert(self.attr("id"));+//+Here+i+get+the+actually+clicked+element
++++$.when($("div.someClass").animate({+},+0)).then(function+()+{
++++++alert(self.attr("id"));+//+Here+i+get+the+first+element+in+of+that+class
++++});
++});
});|code-block|syntax|javascript|3592147|entityMap^0|8|4|12|4|1U|8|23|7|0|0|A|4|0|E|4|T|6|0|4|A|F|9|Z|4|0|0|A|4|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|16|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|J|3|K|5|I|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|L|3|M|5|I|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|N|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1N|8|@$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1Q|8|@]|D|@]|E|$T|U]]|$1|V|3|-4|5|6|7|1R|8|@]|D|@]|E|$]]]|W|$]]

The value of <code>this</code> is automatically altered on every function call. So, unless multiple function calls conspire to purposely preserve a particular value of <code>this</code> by passing it in and then using <code>.apply()</code> or <code>.call()</code> to set it before calling your callback, it will be different. Javascript goes by these rules:

<ul>
<li>If you make a method call, the value of <code>this</code> is set to the object whose method it is. </li>
<li>If you make a normal function call, <code>this</code> is set to the global object (normally <code>window</code>). </li>
<li>If you use <code>fn.apply()</code> or <code>fn.call()</code>, then <code>this</code> is set based on the first argument.</li>
</ul>

The simplest solution is to save the value of <code>this</code> in a local variable and then refer to that.

<pre><code>$("div.someClass").each(function (index) {
 var self = $(this);
 self.click(function () {
 alert(self.attr("id")); // Here i get the actually clicked element
 $.when($("div.someClass").animate({ }, 0)).then(function () {
 alert(self.attr("id")); // Here i get the first element in of that class
 });
 });
});
</code></pre>

blocks|key|1955193|text|您需要访问每个函数的元素：http://api.jquery.com/each/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1955194|$("div.someClass").each(function+(index,+element)+{
++$(element).click(function+()+{
++++var+$this+=+$(this);
++++alert($this.attr("id"));+//+Here+i+get+the+actually+clicked+element
++++$.when($("div.someClass").animate({+},+0)).then(function+()+{
++++++alert($this.attr("id"));+//+Here+i+get+the+first+element+in+of+that+class
++++});
++});
});|code-block|syntax|javascript|1955195|还有助于阅读"this“的含义：https://developer.mozilla.org/en/JavaScript/Reference/Operators/this+jQuery可能会混淆您对"this”应该是什么的理解，以及它为事件处理所做的所有上下文更改。|1955196|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/each/|1|https://developer.mozilla.org/en/JavaScript/Reference/Operators/this^0|D|R|0|0|0|G|1W|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

You need to access the element of the each function: <a href="http://api.jquery.com/each/" rel="nofollow">http://api.jquery.com/each/</a>

<pre><code>$("div.someClass").each(function (index, element) {
 $(element).click(function () {
 var $this = $(this);
 alert($this.attr("id")); // Here i get the actually clicked element
 $.when($("div.someClass").animate({ }, 0)).then(function () {
 alert($this.attr("id")); // Here i get the first element in of that class
 });
 });
});
</code></pre>

Also helps to read up on what "this" means: <a href="https://developer.mozilla.org/en/JavaScript/Reference/Operators/this" rel="nofollow">https://developer.mozilla.org/en/JavaScript/Reference/Operators/this</a>
jQuery can confuse your understanding of what "this" is supposed to be with all the context changing it does for event handling.

When i execute the following code, i'd expect the same element id to be alerted twice but instead, the first one is correct while the second always show the name of the first element in the set.

<pre><code>$("div.someClass").each(function (index) {
 $(this).click(function () {
 alert($(this).attr("id")); // Here i get the actually clicked element
 $.when($("div.someClass").animate({ }, 0)).then(function () {
 alert($(this).attr("id")); // Here i get the first element in of that class
 });
 });
});
</code></pre>

Why is it so? How to resolve it? I have tried passing the name of the element into the function but it didn't work.

Unexpected scope for $(this) in jQuery using each and function

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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当我执行下面的代码时，我希望相同的元素id会被警告两次，但实际上，第一个是正确的，而第二个总是显示集合中第一个元素的名称。$("div.someClass").each(function (index) {  $(this).click(function () {    alert($(this).attr("id")...

问使用each和函数的jQuery中$(this)的意外作用域
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问使用each和函数的jQuery中$(this)的意外作用域EN