JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<body>

<p>Image to use:</p>
<img id="scream" src="http://www.w3schools.com/tags/img_the_scream.jpg" alt="The Scream" width="220" height="277">

<p>Canvas:</p>
<canvas id="myCanvas" width="250" height="300" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>

<p> Canvas2: </p>
<canvas id="myCanvas2" width="250" height="300" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>

</body>
</html>

JavaScript

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");

var img=document.getElementById("scream");
ctx.drawImage(img,30,5);
ctx.drawImage(img,5,30);

var c2=document.getElementById("myCanvas2");

var ctx2=c2.getContext("2d");


ctx2.drawImage(c,0,0)
ctx2.drawImage(img,-10,50);


var image = c2.toDataURL("image/png"); 
console.log(image);

image = image.replace('data:image/png;base64,', '');
console.log(image);