JSFiddle - React, Tailwind, and code Playground

by namuol

HTML

<div id='debug'></div>

<div id='widget'>
    <div id='header'>
    THIS IS THE HEADER ALOALALALAOLLOOOLLL ad adgdfg sgfs fgsdfg sdfg sdfgs f
    </div>
    <ul>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
        <li>sadasdasdasd</li>
    </ul>
</div>

CSS

#widget {
    width: 400px;
    height: 200px;
    background: #f00;
}
#header {
    background: #fff;
    min-height: 20px;
    overflow: hidden;
}
#widget ul {
    background: #fff;
    height: 180px;
    overflow: auto;
}
#widget ul li {
    height: 30px;
}

#debug {
    /*background: rgba(0,0,0,0.1);*/
    border: 1px solid black;
    width: 399px;
    height: 199px;
    position: absolute;
    top: 0;
    z-index: -1;
}