blocks|key|231924|text|您可以使用正则表达式或split类名。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|231925|$(".etape").click(function(){
+++var+classes+=+$.grep(this.className.split("+"),+function(v,+i){
+++++++return+v.indexOf('btn')+===+0;
+++}).join();
});|code-block|syntax|javascript|231926|http://jsfiddle.net/LQPh6/|231927|entityMap|0|LINK|mutability|MUTABLE|url^0|B|5|0|0|0|Q|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|W|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|X|8|@]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|L]]]]

You can use Regular Expression or <code>split</code> the class name.

<pre><code>$(".etape").click(function(){
 var classes = $.grep(this.className.split(" "), function(v, i){
 return v.indexOf('btn') === 0;
 }).join();
});
</code></pre>

<a href="http://jsfiddle.net/LQPh6/" rel="noreferrer">http://jsfiddle.net/LQPh6/</a>

blocks|key|5707365|text|您还可以尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5707366|$(".etape").click(function+()+{
++++var+theClass+=+$(this).attr("class").match(/btn[\w-]*\b/);
++++console.log(theClass);+
});|code-block|syntax|javascript|5707367|使用匹配而不是grep...|5707368|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can also try:

<pre><code>$(".etape").click(function () {
 var theClass = $(this).attr("class").match(/btn[\w-]*\b/);
 console.log(theClass); 
});
</code></pre>

Uses match instead of grep...

blocks|key|938707|text|+//+Only+select+input+which+have+class+
+$('input[class]').click(function(){++
+++var+myClass;
+++//+classNames+will+contain+all+applied+classes
+++var+classNames+=+$(this).attr('class').split(/\s%2B/);++

+++++//+iterate+over+all+class++
+++++$.each(classNames,+function(index,+item)+{
++++++++//+Find+class+that+starts+with+btn-
++++++++if(item.indexOf("btn-")+==+0){
++++++++++//+Store+it
++++++++++myClass+=+item;
++++++++}
+++++});

++});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|938708|unstyled|938709|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|I|8|@]|9|@]|A|$]]|$1|F|3|-4|5|E|7|J|8|@]|9|@]|A|$]]]|G|$]]

<pre><code> // Only select input which have class 
 $('input[class]').click(function(){ 
 var myClass;
 // classNames will contain all applied classes
 var classNames = $(this).attr('class').split(/\s+/); 

 // iterate over all class 
 $.each(classNames, function(index, item) {
 // Find class that starts with btn-
 if(item.indexOf("btn-") == 0){
 // Store it
 myClass = item;
 }
 });

 });
</code></pre>

<a href="http://jsfiddle.net/aFmY7/" rel="noreferrer">Live Demo</a>

blocks|key|942234|text|将这些值存储在data属性中可能会更好：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|942235|<input+class="etape+others"+data-btntype="info">
<input+class="etape+others"+data-btntype="inverse">
<input+class="etape+others"+data-btntype="danger">|code-block|syntax|javascript|942236|然后：|942237|+$(".etape").click(function(){
+++++var+myBtnType+=+$(this).data('btntype');
+});|942238|jsFiddle|942239|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/jQuery.data/|1|http://jsfiddle.net/Mr5zn/^0|7|4|7|4|0|0|0|0|0|0|8|1|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|17|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|19|8|@]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|Q|3|-4|5|6|7|1D|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]]]

It would probably be better to store those values in the <a href="http://api.jquery.com/jQuery.data/" rel="noreferrer"><code>data</code></a> attribute: 

<pre><code>&lt;input class="etape others" data-btntype="info"&gt;
&lt;input class="etape others" data-btntype="inverse"&gt;
&lt;input class="etape others" data-btntype="danger"&gt;
</code></pre>

Then:

<pre><code> $(".etape").click(function(){
 var myBtnType = $(this).data('btntype');
 });
</code></pre>

<a href="http://jsfiddle.net/Mr5zn/" rel="noreferrer">jsFiddle</a>

blocks|key|942211|text|你可以让btn成为它自己的类。然而，这将会起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|942212|$("div[class%5E='btn-']")|code-block|syntax|javascript|942213|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|$]]

You could just make btn its own class. However, this will work.

<pre><code>$("div[class^='btn-']")
</code></pre>

blocks|key|2355132|text|试试这个：$('input[class*='btn']').attr("class");|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2355133|entityMap^0|5|13|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Try this: <code>$('input[class*='btn']').attr("class");</code>

blocks|key|2355307|text|我刚刚把@的函数改成了可重用的:|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2355308|//+getClassStartsWith(classes,startswith);
//+Example+:+getClassStartsWith(+'item+w-2+h-4+hello'+,+'h-'+);
function+getClassStartsWith(t,n){var+r=$.grep(t.split("+"),function(t,r){return+0===t.indexOf(n)}).join();return+r%7C%7C!1}|code-block|syntax|javascript|2355309|例如。|2355310|HTML+:|2355311|<div+class="item+w-2+h-4+hello"></div>|2355312|JS+:|2355313|var+$element+=+$('.item');
var+classes+=+$element[0].className;
var+getHeight+=+getClassStartsWith(classes,'h-');|2355314|这将返回h-4，如果没有以开头的类，则h-将返回false|CODE|2355315|演示:+http://jsbin.com/mijujunaca/edit?js,console|2355316|entityMap|0|LINK|mutability|MUTABLE|url|http://jsbin.com/mijujunaca/edit?js,console^0|5|B|0|0|0|0|0|0|4|0|0|4|3|J|2|O|5|0|0|3|4|17|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1B|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1C|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|1D|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|S|3|T|5|H|7|1H|8|@]|D|@]|E|$I|J]]|$1|U|3|V|5|6|7|1I|8|@$9|1J|A|1K|B|W]|$9|1L|A|1M|B|W]|$9|1N|A|1O|B|W]]|D|@]|E|$]]|$1|X|3|Y|5|6|7|1P|8|@$9|1Q|A|1R|B|C]]|D|@$9|1S|A|1T|1|1U]]|E|$]]|$1|Z|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]]]

I just made @Vohuman 's function to reusable one :

<pre><code>// getClassStartsWith(classes,startswith);
// Example : getClassStartsWith( 'item w-2 h-4 hello' , 'h-' );
function getClassStartsWith(t,n){var r=$.grep(t.split(" "),function(t,r){return 0===t.indexOf(n)}).join();return r||!1}
</code></pre>

Example...

HTML :

<pre><code>&lt;div class="item w-2 h-4 hello"&gt;&lt;/div&gt;
</code></pre>

JS :

<pre><code>var $element = $('.item');
var classes = $element[0].className;
var getHeight = getClassStartsWith(classes,'h-');
</code></pre>

That will return <code>h-4</code>, And if no class starts with <code>h-</code> will return <code>false</code>

Demo : <a href="http://jsbin.com/mijujunaca/edit?js,console" rel="nofollow">http://jsbin.com/mijujunaca/edit?js,console</a>

blocks|key|942197|text|这个怎么样？http://api.jquery.com/attribute-contains-word-selector/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|942198|$('input[class~="btn-"]')|code-block|syntax|javascript|942199|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/attribute-contains-word-selector/^0|6|1J|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]]]]

How about this?
<a href="http://api.jquery.com/attribute-contains-word-selector/" rel="nofollow">http://api.jquery.com/attribute-contains-word-selector/</a>

<pre><code>$('input[class~="btn-"]')
</code></pre>

blocks|key|938725|text|以btn开头的类，不能是第一个类：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|938726|工作小提琴：http://jsfiddle.net/c9Tdx/|938727|$("input[class%5E='btn'],input[class*='+btn']").each(function(){
+++++//whatever
});|code-block|syntax|javascript|938728|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/c9Tdx/^0|1|3|0|6|Q|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

A class starting with <code>btn</code> and which can not be the first class:

Working fiddle: <a href="http://jsfiddle.net/c9Tdx/" rel="nofollow">http://jsfiddle.net/c9Tdx/</a>

<pre><code>$("input[class^='btn'],input[class*=' btn']").each(function(){
 //whatever
});
</code></pre>

blocks|key|5707304|text|尝尝这个,|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5707305|if($(selector).attr("class").lastIndexOf("classToStartFrom")+==+0)
+++return+"this+selector+class+name+starts+with+'classToStartFrom'";
else
+++return+"this+selector+class+name+doesn't+start+with+'classToStartFrom'";|code-block|syntax|javascript|5707306|代码未经过测试。|5707307|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try this,

<pre><code>if($(selector).attr("class").lastIndexOf("classToStartFrom") == 0)
 return "this selector class name starts with 'classToStartFrom'";
else
 return "this selector class name doesn't start with 'classToStartFrom'";
</code></pre>

The code is not tested.

blocks|key|938844|text|此函数可以使用正则表达式获取类、ID、数据和所有类型的属性|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|938845|$.fn.Get_Attr_Regex+=+function(Pattern,Type)+
{
++++Type+=+Type+%7C%7C 'class';
++++var+List_Str+=+this.attr(Type);

++++if(typeof+List_Str+!==+typeof+undefined+&&+List_Str+!==+false)+
++++{
++++++++var+regex+=+new+RegExp(Pattern,+"g");
++++++++var+List_Array+=+List_Str.split("+");
++++++++for(var+i+=+0;+i+<+List_Array.length;+i%2B%2B)
++++++++{
++++++++++++if(regex.test(List_Array[i]))
++++++++++++{
++++++++++++++++return+List_Array[i];
++++++++++++}
++++++++}
++++}
++++return+false;
};|code-block|syntax|javascript|938846|使用它|938847|$('.T_Header').Get_Attr_Regex('btn.*','class');+//+=>+return+class+value+which+start+with+btnxxx|938848|或|938849|$('.T_Header').Get_Attr_Regex('btn.*','id');++//+=>+return+id+value+which+start+with+btnxxx|938850|938851|$('.T_Header').Get_Attr_Regex('btn.*','data-info');+//+=>+return+data+attribute+value+which+start+with+btnxxx|938852|entityMap^0|7|5|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|11|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|13|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|S|3|P|5|6|7|15|8|@]|D|@]|E|$]]|$1|T|3|U|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|V|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|W|$]]

This function can get Class, ID, Data and all kind of attributes using regex

<pre><code>$.fn.Get_Attr_Regex = function(Pattern,Type) 
{
 Type = Type || 'class';
 var List_Str = this.attr(Type);

 if(typeof List_Str !== typeof undefined &amp;&amp; List_Str !== false) 
 {
 var regex = new RegExp(Pattern, "g");
 var List_Array = List_Str.split(" ");
 for(var i = 0; i &lt; List_Array.length; i++)
 {
 if(regex.test(List_Array[i]))
 {
 return List_Array[i];
 }
 }
 }
 return false;
};
</code></pre>

To use it 

<pre><code>$('.T_Header').Get_Attr_Regex('btn.*','class'); // =&gt; return class value which start with btnxxx
</code></pre>

or

<pre><code>$('.T_Header').Get_Attr_Regex('btn.*','id'); // =&gt; return id value which start with btnxxx
</code></pre>

or

<pre><code>$('.T_Header').Get_Attr_Regex('btn.*','data-info'); // =&gt; return data attribute value which start with btnxxx
</code></pre>

I have a list of elements that have multiple classes, for example:

<pre><code>&lt;input class="etape btn-info others"&gt;
&lt;input class="etape btn-inverse others"&gt;
&lt;input class="etape btn-danger others"&gt;
</code></pre>

How to write jQuery-code that will allow me the following...

<pre><code>$(".etape").click(function(){
 $(this).get("the class that starts with btn-")
 // in order to store this value in a variable to reuse it later 
});
</code></pre>

How to get elements of specific class starting with a given string?

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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我有一个具有多个类的元素列表，例如：<input class="etape btn-info others"><input class="etape btn-inverse others"><input class="etape btn-danger others">如何编写jQuery代码，使我可以实现以下功能...$(".etape").click(function(){ $(this).

问如何获取以给定字符串开头的特定类的元素？
EN

回答 11

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问如何获取以给定字符串开头的特定类的元素？EN

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问如何获取以给定字符串开头的特定类的元素？
EN