JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
    <div id="content">hogehoge fugafuga</div>
</div>

CSS

#wrapper {
    position: relative;
    width: 50%;
    border: 1px solid;
}
#wrapper:before {
    content:"";
    display: block;
    padding-top: 75%;
}
#content {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-color: yellow;
}