JSFiddle - React, Tailwind, and code Playground

by Bartosz Zieliński

HTML

<canvas width=500 height=500 id="canv"></canvas>

JavaScript

var c = document.getElementById("canv");
var ctx = c.getContext("2d");
ctx.fillRect(100,100,300,300);
var cc = new OffscreenCanvas(500,500);
ctx = cc.getContext("2d");
ctx.drawImage(c);