JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/kangax/fabric.js/master/dist/fabric.js"></script>
<canvas id="canvas" width="400" height="400"></canvas>

CSS

canvas
{
    border: 2px solid black;
}

JavaScript

var canvas = new fabric.Canvas('canvas');
var url = "http://serio.piiym.net/CVBla/txtboard/thumb/1260285874089s.jpg";
fabric.Image.fromURL(url, function (img){
    img.left = 80;
    img.top = 50;
    canvas.add(img);
});
canvas.renderAll();

alert(canvas.getZoom());

canvas.setZoom(canvas.getZoom()*2);
canvas.renderAll();

alert(canvas.getZoom());