JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="element">
        some text
    </div>
</div>

CSS

#container {
    display: inline-block;
    width: 100%;
    background-color: red;
}
#element {
    height: 0;
    padding-bottom: 100%;
    background-color: silver;
}