使用javascript(或jQuery)选择和操作CSS伪元素，例如:: before和:: after

问题描述：

是否可以使用jQuery选择/操作CSS伪元素，例如::before和::after(以及带有分号的旧版本)?

Is there any way to select/manipulate CSS pseudo-elements such as ::before and ::after (and the old version with one semi-colon) using jQuery?

例如，我的样式表具有以下规则:

For example, my stylesheet has the following rule:

.span::after{ content:'foo' }

如何使用香草JS或jQuery将'foo'更改为'bar'?

How can I change 'foo' to 'bar' using vanilla JS or jQuery?

答

您还可以将内容传递给具有data属性的伪元素，然后使用jQuery进行操作:

You could also pass the content to the pseudo element with a data attribute and then use jQuery to manipulate that:

在HTML中:

<span>foo</span>

在jQuery中:

$('span').hover(function(){
    $(this).attr('data-content','bar');
});

在CSS中:

span:after {
    content: attr(data-content) ' any other text you may want';
}

如果要防止显示其他文本"，可以将其与seucolega的解决方案结合使用，如下所示:

If you want to prevent the 'other text' from showing up, you could combine this with seucolega's solution like this:

在HTML中:

<span>foo</span>

在jQuery中:

$('span').hover(function(){
    $(this).addClass('change').attr('data-content','bar');
});

在CSS中:

span.change:after {
    content: attr(data-content) ' any other text you may want';
}