JSFiddle - React, Tailwind, and code Playground

by f0t0n

HTML

<form id="my-form" action="">
    <input type="text" />
    <input type="text" />
    <input type="text" />
</form>

JavaScript

var id = 'my-form',
    btn = document.createElement('input');
btn.type = 'button';
btn.value = 'Click me!';
btn.onclick = function() {
    var inputs = document.getElementsByTagName('input');
    // NodeList to Array if needed:
    // var inputsArray = Array.prototype.slice.call(inputs);
    for(var i = 0, l = inputs.length; i < l; i++) {
        inputs[i].value = i;
    }
    return false;
};
document.getElementById(id).appendChild(btn);