JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="myCanvas" width="1000" height="600"> 
</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");
ctx.fillStyle="#FF0000";
ctx.fillRect(0,0,150,75);