如何在 jQuery 中选择具有多个类的元素？

Question

I want to select all the elements that have the two classes a and b.

<element class="a b">

So, only the elements that have both classes.

When I use $(".a, .b") it gives me the union, but I want the intersection.

转载于:https://stackoverflow.com/questions/1041344/how-can-i-select-an-element-with-multiple-classes-in-jquery

Answer 1

If you want to match only elements with both classes (an intersection, like a logical AND), just write the selectors together without spaces in between:

$('.a.b')

So for a div element that has an ID of a with classes b and c, you would write:

$('div#a.b.c')