JSFiddle - React, Tailwind, and code Playground
HTML
<div id="YOURDIVID">
<form>
<input type="text" alt="sdfa" placeholder="test">
</form>
</div>
<button onclick="disable">
dissable form
</button>
JavaScript
function disable() {
var fields = document.getElementById("YOURDIVID").getElementsByTagName('*');
for(var i = 0; i < fields.length; i++)
{
fields[i].disabled = true;
}
}