blocks|key|338857|text|在外部作用域中定义myVar：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|338858|var+myVar;

$('#first').click(function()+{
++++myVar+=+$(this).next().val();
});

$('#second').blur(function()+{
++++console.log(myVar);
});|code-block|syntax|javascript|338859|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Define myVar in the outer scope:

<pre><code>var myVar;

$('#first').click(function() {
 myVar = $(this).next().val();
});

$('#second').blur(function() {
 console.log(myVar);
});
</code></pre>

blocks|key|338923|text|这取决于代码的更广泛的上下文。您可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|338924|(function()+{
++++var+myVar;

++++$('#first').click(function()+{
++++++++myVar+=+$(this).next().val();
++++});

++++$('#second').blur(function()+{
++++++++console.log(myVar);
++++});
})();|code-block|syntax|javascript|338925|这会创建一个匿名函数并立即调用它。匿名函数的目的是在不使myVar成为全局变量的情况下为myVar提供容器。通常最好避免使用全局变量(尤其是因为它们变成了window对象的属性，这个对象已经有各种各样的垃圾了)。具体地说，分配给click和blur事件的函数将成为匿名函数调用内部数据的闭包。他们可以访问myVar，但其他用户无法访问。More+here。|offset|length|style|CODE|338926|如果您的代码已经在一个包含作用域中，或者您不关心添加到全局名称空间，则不需要匿名函数。|338927|entityMap|0|LINK|mutability|MUTABLE|url|http://blog.niftysnippets.org/2008/02/closures-are-not-complicated.html^0|0|0|S|5|18|5|25|6|36|5|3C|4|48|5|4O|9|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]|$I|11|J|12|K|L]|$I|13|J|14|K|L]|$I|15|J|16|K|L]|$I|17|J|18|K|L]|$I|19|J|1A|K|L]]|9|@$I|1B|J|1C|1|1D]]|A|$]]|$1|M|3|N|5|6|7|1E|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

It depends on the wider context of your code. You can do this:

<pre><code>(function() {
 var myVar;

 $('#first').click(function() {
 myVar = $(this).next().val();
 });

 $('#second').blur(function() {
 console.log(myVar);
 });
})();
</code></pre>

That creates an anonymous function and calls it right away. The purpose of the anonymous function is to provide a container for <code>myVar</code> without making <code>myVar</code> a global variable. Global variables are generally best avoided (not least because they become properties of the <code>window</code> object, which already has all sorts of junk stuck on it). Specifically, the functions you're assigning to your <code>click</code> and <code>blur</code> events become closures over the data inside the call to the anonymous function. They have access to <code>myVar</code>, but nothing else does. <a href="http://blog.niftysnippets.org/2008/02/closures-are-not-complicated.html" rel="nofollow">More here</a>.

If your code is already inside a containing scope, or you don't care about adding to the global namespace, you don't need the anonymous function.

blocks|key|2406592|text|T.J.克劳德的回答满足了你的要求。这只是一种替代方法(使用jQuery+data+storage方法)：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2406593|$('#first').click(function()+{
++++//+Assign+this+element+to+have+data+with+the+key+'myVar'
++++$(this).data('myVar',+$(this).next().val());
});

$('#second').blur(function()+{
++++//+Read+the+data+from+the+other+element
++++console.log($('#first').data('myVar'));
});|code-block|syntax|javascript|2406594|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/data/^0|11|C|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

T.J. Crowder's answer does what you want. This is just an alternative (using the jQuery <a href="http://api.jquery.com/data/" rel="nofollow">data storage</a> methods):

<pre><code>$('#first').click(function() {
 // Assign this element to have data with the key 'myVar'
 $(this).data('myVar', $(this).next().val());
});

$('#second').blur(function() {
 // Read the data from the other element
 console.log($('#first').data('myVar'));
});
</code></pre>

blocks|key|338977|text|这里的答案是好的。但我认为你已经到了可以从阅读Crockford's+JS+slideshow中获益的时候了。它非常好，并解释了与您的问题相关的几个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|338978|entityMap|0|LINK|mutability|MUTABLE|url|http://www.scribd.com/doc/41582808/Javascript-Crock-Ford^0|N|O|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The answers here are good. But I think you're at the point where you'd benefit from reading <a href="http://www.scribd.com/doc/41582808/Javascript-Crock-Ford" rel="nofollow">Crockford's JS slideshow</a>. It's very good and explains several matters related to your question.

I have the following code 

<pre><code>$('#first').click(function() {
 myVar = $(this).next().val();
});

$('#second').blur(function() {
 console.log(myVar);
});
</code></pre>

How to access myVar within #second ?

Access variables javascript/jquery

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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我有以下代码$('#first').click(function() {    myVar = $(this).next().val();});$('#second').blur(function() {    console.log(myVar);});如何在#秒内访问myVar？

问访问变量javascript/jquery
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