Jquery-检查类是否存在于 Div 中
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Jquery- Check if class Exist inside a Div
提问by VIVEK MISHRA
I have been trying to check whther a class exists inside a div. But it is always resulting a length 0. Here is my Code :-
我一直在尝试检查 div 中是否存在类。但它总是导致长度为 0。这是我的代码：-
<div id="accordion2" class="accordion" >
<div class="accordion-group">
<div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseOne">
<div class="align-nav arrow-active">OSTOMY PRODUCTS</div></a>
</div>
<div id="collapseOne" class="accordion-body in collapse">
<div class="accordion-inner">
<ul>
<li><a href="#">Professional Resources</a></li>
<li><a href="#">One-piece Pouching</a></li>
</ul>
</div>
</div>
</div>
<div class="accordion-group">
<div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseTwo">
<div class="align-nav arrow-inactive">LEARNING CENTER</div>
</a> </div>
<div id="collapseTwo" class="accordion-body collapse">
<div class="accordion-inner">
<ul>
<li><a href="#">Videos</a></li>
<li><a href="#">Before Your Surgery</a></li>
</ul>
</div>
</div>
</div>
<div class="accordion-group">
<div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseThree">
<div class="align-nav">PROFESSIONAL RESOURCES </div>
</a> </div>
</div>
<div class="accordion-group">
<div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseThree">
<div class="align-nav">PROFESSIONAL RESOURCES </div>
</a> </div>
</div>
</div>
For the First 2 div $(this).find('accordion-body').length should be 1. But it still show 0. My Jquery COde is as Follows :-
对于第一个 2 div $(this).find('accordion-body').length 应该是 1。但它仍然显示 0。我的 Jquery 代码如下：-
$('.accordion-heading').click(function() {
if($(this).find('accordion-body').exist()) {
alert('hi');
if($(this).find('.collapsed').length > 0) {
alert('hi');
//$(this).find('.accordion-toggle .align-nav').removeClass('arrow-active').addClass('arrow-inactive');
}
else {
alert('hi');
//$(this).find('.accordion-toggle .align-nav').removeClass('arrow-inactive').addClass('arrow-active');
}
}
});
I need to get the $(this).find('accordion-body').length = 1; Please provide Solutions.
我需要得到 $(this).find('accordion-body').length = 1; 请提供解决方案。
回答by bipen
you should select a class selector in findsince your are searching for class .. and since accordion-body is parents descensent use parent()
您应该选择一个类选择器，find因为您正在搜索类 .. 并且因为手风琴体是父母的后代使用parent()
try this
尝试这个
$(this).parent().find('.accordion-body').length == 1;
or you can use hasClass()
或者你可以使用 hasClass()
回答by Explosion Pills
That would be '.accordion-body'(the period is vital -- it is the class selector).
那将是'.accordion-body'（句点很重要——它是类选择器）。
Also .exist()is not a jQuery method, but I'll assume you've defined it somewhere.
另外.exist()是不是一个jQuery的方法，但我会假设你在什么地方定义它。
回答by Jai
Try this one:
试试这个：
You should find for siblings not the children, because .accordion-bodyis not a children of .accordion-headingit is a sibling instead.
你应该为兄弟姐妹而不是孩子们寻找，因为.accordion-body它不是一个孩子，.accordion-heading而是一个兄弟姐妹。
$('.accordion-heading').click(function() {
if($(this).siblings('.accordion-body').length > 0) {
alert('hi');
if($(this).siblings('.collapsed').length > 0) {
alert('hi');
//$(this).find('.accordion-toggle .align-nav').removeClass('arrow-active').addClass('arrow-inactive');
}
else {
alert('hi');
//$(this).find('.accordion-toggle .align-nav').removeClass('arrow-inactive').addClass('arrow-active');
}
}
});
Issues were in your code:
您的代码中存在问题：
.exist()is not a valid method to check any element$(this).find()this finds the children not siblings at same level
.exist()不是检查任何元素的有效方法$(this).find()这会发现孩子不是同一级别的兄弟姐妹
回答by diEcho
you are traversing in wrong context. Also try with latest jQuery and .onmethod
你在错误的上下文中遍历。还可以尝试使用最新的 jQuery 和 .on方法
$('#accordion2').on('click','.accordion-heading', function() {
var accordionBodyLength = $(this).parent();
var $accordBody = $('.accordion-body');
alert(accordionBodyLength.find($accordBody).length);
});
