JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content"> 
    <span class="overlay">X</span>
    X
</div>

CSS

.content {
    display: inline-block;
    position: relative;
    font-size: 50px;
    color: black;
}

.overlay {
    width: 50%;
    position: absolute;
    color: red;
    overflow: hidden;
}