JSFiddle - React, Tailwind, and code Playground
HTML
<input id="numofrows" type="text"/>
<div id="parent"></div>
JavaScript
var container =document.getElementById('parent');
document.getElementById('numofrows').onkeyup = function () {
var foo = [];
while (container.firstChild) container.removeChild(container.firstChild);
for (var i = 0; i < this.value; i++) {
foo[i] = document.createElement('div');
container.appendChild(foo[i]);
}
}