jQuery 如何获取父元素的类？
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How can I get the class of a parent element?
提问by supersize
I would like to find the classof the parent element of the child with .current.
我想class用.current.
var currentli = $('.nav').find('a.current').parent().attr('class');
console.log(currentli);<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="nav">
<ul>
<li class="tab1">
<a href="#1" class="current">Welcome</a>
</li>
<li class="tab2">
<a href="#2">About</a>
</li>
<!-- and some lists more -->
</ul>
</div>but it always throws me undefined
但它总是让我失望 undefined
NOTE:I don't know which acurrently has .currentwhich is why I have to use the .find()method.
注意：我不知道哪个a当前具有.current，这就是我必须使用该.find()方法的原因。
回答by Ja?ck
Your code should already work, but it might be more reliable to access the property classNameinstead:
您的代码应该已经可以工作了，但访问该属性可能更可靠className：
var currentli = $('.nav').find('a.current').parent().prop('className');
回答by RaphaelDDL
This will work:
这将起作用：
var currentli = $($('.nav').find('a.current')).parent().attr('class');
console.log(currentli);
I'm simply transforming the found collection into a jQuery object again.
我只是将找到的集合再次转换为 jQuery 对象。
See fiddle: http://jsfiddle.net/RaphaelDDL/wnW4u/
见小提琴：http: //jsfiddle.net/RaphaelDDL/wnW4u/
Ps.: If more than one ahas class="current", only the first one will be retrieved.
PS：如果有多个a有class="current"，只有第一个将被检索。
