JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1>          <h1>haha</h1><h1>haha</h1><h1>haha</h1>
<h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1>
<h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1><h1>haha</h1>
</div>

CSS

div {
    overflow:hidden;
    /* overflow-y:scroll; */
    height: 300px;
    border: 6px solid red;
}