JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    My Short Content
</div>

CSS

div {
    background: yellow;
    overflow: hidden;
    cursor:pointer;
}
div:after {
    content:' xxxxxxxxxxxxxxxxxxxxxxx';
    display: inline-block;
    background: blue;
    cursor:auto;
    width: 0;
    padding-right: 100%;
    margin-right: -100%;
}