JSFiddle - React, Tailwind, and code Playground

CSS

td {
    width: 1px;
    height: 1px;
    padding: 0;
}
table {
    border-collapse: collapse;
}

JavaScript

var table = document.createElement('table');
for (var i=0;i<100;i++) {
    var tr = document.createElement('tr');
    for (var j=0;j<100;j++){
        var td = document.createElement('td');
        var hue = Math.round(Math.random()*360);
        td.style.backgroundColor = 'hsl('+hue+',100%,50%)';
        tr.appendChild(td);
    }
    table.appendChild(tr);
}
document.body.appendChild(table);