JSFiddle - React, Tailwind, and code Playground

by eelyafi

HTML

<div id="matrix"></<div>

CSS

#matrix {
    border: 1px solid green;
    width: 300px;
}

#matrix div {
    width: 30px;
    height: 30px;
    box-sizing: border-box;
    border: 1px solid blue;
    display: inline-block;
    text-align: center;
}

#matrix div:before {
    content: '';
    display: inline-block;
    vertical-align: middle;
    height: 100%;
    width: 0;
}

JavaScript

var n = 10;
var matrix = document.getElementById('matrix');
var frag = document.createDocumentFragment();

for (var i = n*n; i > 0; i--) {
    var div = document.createElement('DIV');
    div.textContent = i;
    frag.appendChild(div);
    matrix.appendChild(frag);
}