JSFiddle - React, Tailwind, and code Playground

JavaScript

var div_a1 = document.createElement('div');
div_a1.className = 'a1';
document.getElementsByTagName('body')[0].appendChild(div_a1);


var div_a2 = document.createElement('div');
div_a2.className = 'a2';
div_a1.appendChild(div_a2);


var input = document.createElement('input');
input.type = "text";
div_a2.appendChild(input);