JSFiddle - React, Tailwind, and code Playground

CSS

div {
    float: left;
    height: 3px;
    width: 3px;
    }
    body, html {
        margin: 0;
        width: 100%;
        height: 100%;
    }

JavaScript

var colors = '';
for(var i =0; i < 10000; i++)
    colors += '<div style="background-color: '+'#' + Math.floor(Math.random()*16777215).toString(16)+'" />';

$('body').html(colors);