有没有办法将$(this)与:nth-​​child结合? [英] Is there a way to combine $(this) with :nth-child?

问题描述

我正处于.each迭代的中间，想为每个子项召集第二个或第三个孩子.但是无法使其工作.

I'm in the middle of an .each iteration and wanted to call out the 2nd or 3rd child for the each..but cant make it work.

alert($(this + ' :nth-child(2)').attr('id'));

我能想到的唯一选择就是像这样的可怕愚蠢:

My only option that I can think of is something terrible goofy like this:

 $(this).children(':first').next().attr('id', 'ddParam' + newCount);
 $(this).children(':first').next().next().attr('id', 'txt' + newCount);
 $(this).children(':first').next().next().next().attr('id'...

推荐答案

您需要的是

What you need is context. With context, the selector will only look for elements that are the children of the context (in this case this).

$(':nth-child(2)', this).attr('id');

jsFiddle演示

这基本上与:

$(this).find(':nth-child(2)').attr('id');

如果只需要直系子代，而不是每个后代，则应使用.children():

If you only need the direct children, not every descendant, you should use .children():

$(this).children(':nth-child(2)').attr('id');

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