将类选择器和属性选择器与jQuery结合 [英] Combining a class selector and an attribute selector with jQuery

问题描述

是否可以将类选择器和属性选择器与jQuery结合使用?

Is it possible to combine both a class selector and an attribute selector with jQuery?

例如，给定以下HTML:

For example, given the following HTML:

<TABLE>
  <TR class="myclass" reference="12345"><TD>Row 1</TD></TR>
  <TR class="otherclass" reference="12345"><TD>Row 2</TD></TR>
  <TR class="myclass" reference="12345"><TD>Row 3</TD></TR>
  <TR class="myclass" reference="54321"><TD>Row 4</TD></TR>
</TABLE>

我只能用来选择第1行和第3行的选择器是什么?

What would be the selector I can use to select rows 1 and 3 only?

我尝试过:

$(".myclass [reference=12345]") // returns nothing

$(".myclass, [reference=12345]") // returns all 4 rows (yes, I know the comma means 'or')

我确信答案非常简单，我已经尝试搜索jQuery论坛和文档，但是我似乎无法弄清楚这一点.有人可以帮忙吗?

I'm sure the answer is very simple and I have tried searching the jQuery forums and documentation but I can't seem to figure this one out. Can anyone help?

推荐答案

组合它们.从字面上看组合它们；将它们附加在一起，没有任何标点符号.

Combine them. Literally combine them; attach them together without any punctuation.

$('.myclass[reference="12345"]')

您的第一个选择器将查找具有属性值的元素，该属性值包含在类的元素中.
该空间被解释为后代选择器.

Your first selector looks for elements with the attribute value, contained in elements with the class.
The space is being interpreted as the descendant selector.

您的第二个选择器，就像您说的那样，查找具有属性值或/或类或二者兼有的元素.
逗号被解释为多重选择器运算符-意味着什么(CSS选择器没有运算符"的概念；逗号可能更准确地称为定界符.

Your second selector, like you said, looks for elements with either the attribute value, or the class, or both.
The comma is being interpreted as the multiple selector operator — whatever that means (CSS selectors don't have a notion of "operators"; the comma is probably more accurately known as a delimiter).

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