JSFiddle - React, Tailwind, and code Playground

HTML

<div id="sidebar">
    <div id="scroller">
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
        <p>Hello World</p>
   ...

CSS

#sidebar{
    width: 200px;
    border: 1px solid #000;
    height: 100%;
}