如何在 jQuery 中隐藏“for”属性具有特定值的标签标签？
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How to hide a label tag in jQuery that has a certain value for the "for" attribute?
提问by Sam
I want to hide this label tag:
我想隐藏这个标签：
<label for="id_url">URL</label>
Only thing that distinguishes it from the other form elements is the value inside the for attribute. I don't have access to the form's html to add a class or id to it. So how can I hide it?
唯一区别于其他表单元素的是 for 属性中的值。我无权访问表单的 html 以向其添加类或 id。那么我怎样才能隐藏它呢？
回答by Matt Ball
Use the attribute-equals selector.
使用属性等于选择器。
$('label[for="id_url"]').hide();
If you need to use a separate variable that contains the target attribute value:
如果需要使用包含目标属性值的单独变量：
var target = 'id_url'; // or whatever
$('label[for="' + target + '"]').hide();
回答by Scott
The attribute Equals selector will match exactly the value of any attribute.
属性等于选择器将与任何属性的值完全匹配。
$('label[for="id_url"]').hide()
http://api.jquery.com/attribute-equals-selector/
http://api.jquery.com/attribute-equals-selector/
You can also use other selectors (starts with, ends with, etc.) if you have many labels and/or can't necessarily search for a perfect match.
如果您有很多标签和/或不一定要搜索完美匹配，您也可以使用其他选择器（开头、结尾等）。
http://api.jquery.com/category/selectors/
http://api.jquery.com/category/selectors/
EDIT: note that, from a performance standpoint, attribute-based selectors are fairly slow. If you have a lot of them, it could potentially cause a pretty noticeable slowdown in performance, especially in IE. If you find yourself needing to do this quite a bit, you may want to look at a larger architectural change (if possible).
编辑：请注意，从性能的角度来看，基于属性的选择器相当慢。如果你有很多，它可能会导致性能明显下降，尤其是在 IE 中。如果您发现自己需要这样做很多，您可能需要查看更大的架构更改（如果可能）。
