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Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery

You could also pass the content to the pseudo element with a data attribute and then use jQuery to manipulate that:
In HTML:
<span>foo</span>
In jQuery:
$('span').hover(function(){
    $(this).attr('data-content','bar');
});
In CSS:
span:after {
    content: attr(data-content) ' any other text you may want';
}
If you want to prevent the 'other text' from showing up, you could combine this with seucolega's solution like this:
In HTML:
<span>foo</span>
In jQuery:
$('span').hover(function(){
    $(this).addClass('change').attr('data-content','bar');
});
In CSS:
span.change:after {
    content: attr(data-content) ' any other text you may want';
}



Ref : https://stackoverflow.com/questions/5041494/selecting-and-manipulating-css-pseudo-elements-such-as-before-and-after-usin
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