JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/kangax/fabric.js/master/dist/fabric.min.js"></script>
<input type="file" id="file">
<canvas id="canvas" width="400" height="400"></canvas>
<a href='' id='txt' target="_blank">Click Me!!</a>
<br />
<img id="preview" />
<canvas id="canvas2" width="1000" height="1000" style="display:none;"></canvas>

CSS

canvas{
                border: 1px solid black;
            }

JavaScript

var canvas = new fabric.Canvas('canvas');
var canvas2 = new fabric.Canvas('canvas2');
document.getElementById('file').addEventListener("change", function (e) {
  var file = e.target.files[0];
  var reader = new FileReader();
  reader.onload = function (f) {
    var data = f.target.result;                    
    fabric.Image.fromURL(data, function (img) {
      var oImg = img.set({left: 50, top: 100, angle: 00}).scale(0.9);
      canvas.add(oImg).renderAll();
      canvas2.add(oImg).renderAll();
      var a = canvas.setActiveObject(oImg);
      var dataURL = canvas2.toDataURL({format: 'png', quality: 0.8});
      console.log("aaaaaaaaaaa" + dataURL);

      //                        console.log("Canvas Image " + dataURL);
      //                        document.getElementById('txt').href = dataURL;

    });
  };
  reader.readAsDataURL(file);
});
document.querySelector('#txt').onclick = function (e) {
  e.preventDefault();
  canvas2.deactivateAll().renderAll();
  document.querySelector('#preview').src = canvas2.toDataURL();
}