JSFiddle - React, Tailwind, and code Playground

HTML

<div class="doublefont">HELLO</div>

CSS

div.doublefont {
    position: relative;
    color: red;
    font-family: arial;
}
div.doublefont:after {
    content: attr(content);
    color: blue;
    font-family: tahoma;
    position: absolute;
    top: 0;
    left: 0;
}

JavaScript

$('.doublefont').each(function() {
     $(this).attr('content', $(this).html());
});