JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="myCanvas"> 
</canvas>

CSS

#myCanvas {
    background-color:#FFFF00;

    border: none;
    margin-left:auto;
    margin-right:auto;
}

JavaScript

var canvas=document.getElementById("myCanvas");
var ctx=canvas.getContext("2d");
canvas.width  = 800;
canvas.height = 600;
ctx.wdith=1000;
ctx.fillStyle="#FF0000";
ctx.fillRect(1,1,150,75);