JSFiddle - React, Tailwind, and code Playground

HTML

<p>Show the alert, hit Ctrl/Cmd + C, hit OK, then paste the result into the textarea.</p>
<form>
    <p><button type="button">Show alert</button></p>
    <p><textarea></textarea></p>
</form>

JavaScript

document.getElementsByTagName('button')[0].onclick = function () { 
    alert('This\r\nis\r\na\r\ntest'); 
    document.getElementsByTagName('textarea')[0].focus();
};