JSFiddle - React, Tailwind, and code Playground
by Lhankor_Mhy
HTML
<input id="text" type="text" value="https://teratail.com/questions/187533">
<input id="button" type="button">
<div id="iframe">
</div>JavaScript
document.getElementById('button').addEventListener('click', e => document.getElementById('iframe').innerHTML = `<iframe src="${document.getElementById('text').value}">`);