JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <div class="fix">123445678845456456456411111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111</div>
</div>

CSS

.main{
    width:2000px;
    height:2000px;
}

.fix{
    width:100%;
    overflow:auto;
    position:fixed;
}