JSFiddle - React, Tailwind, and code Playground

HTML

<div class="code">class Greeter {
    

}

window.onload = () => {
    var greeter = new Greeter();
    
};
</ div>

CSS

.code { background:#f5f8fa; background-repeat:no-repeat; border: solid #5C7B90; border-width: 1px 1px 1px 20px; color: #000000; font: 13px 'Courier New', Courier, monospace; line-height: 16px; margin: 10px 0 10px 10px; max-height: 200px; min-height: 16px; overflow: auto; padding: 28px 10px 10px; width: 90%; } .code:hover { background-repeat:no-repeat; }