JSFiddle - React, Tailwind, and code Playground

HTML

<pre>
    hello world!
</pre>

CSS

pre {
    background-color: #eee;
    padding: 10px;
}

JavaScript

document.addEventListener('copy', function(event) {
        console.log(event );  
    event.clipboardData.setData('text/plain', 'head -n1 /etc/passwd');
    event.preventDefault();
    });