How to upload an image to a canvas with Fabric.js?

Question

I want that to create a process where the users can upload their images and then edit them in the browser in a Canvas with Fabric.js using some buttons -wich uses Fabric.js to add some effects-.

I can't make it work. My HTML is:

<form id="uploadImg" runat="server">
  <input type="file" id="uploadedImg"/>
</form>
<canvas id="canvas"></canvas>

The Javascript is the following:

var canvas = new fabric.Canvas('canvas');
canvas.setHeight(480);
canvas.setWidth(640);

$('#uploadedImg').change(function () {
    var imgData = $(this).files[0];
    fabric.util.loadImage(imgData, function(img) {
        var oImg = new fabric.Image(img);
        oImg.scale(0.2).set({
            left: 100,
            top: 100,
        });
    canvas.add(oImg);
    });
}); 

Answer 1

You can upload multiple image by fabric js and its also draggable one place to another place in canvas.

var canvas = new fabric.Canvas('canvas');
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: 0, top: 0, angle: 0,width:100, height:100}).scale(0.9);
      canvas.add(oImg).renderAll();
      var a = canvas.setActiveObject(oImg);
      var dataURL = canvas.toDataURL({format: 'png', quality: 0.8});
    });
  };
  reader.readAsDataURL(file);
});

canvas{
  border: 1px solid black;
}


Include it like this:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://rawgit.com/kangax/fabric.js/master/dist/fabric.min.js"></script>
<input type="file" id="file"><br />
<canvas id="canvas" width="450" height="450"></canvas>

Answer 2

document.getElementById('imgLoader').onchange = function handleImage(e) {
var reader = new FileReader();
  reader.onload = function (event){
    var imgObj = new Image();
    imgObj.src = event.target.result;
    imgObj.onload = function () {
      var image = new fabric.Image(imgObj);
      image.set({
            angle: 0,
            padding: 10,
            cornersize:10,
            height:110,
            width:110,
      });
      canvas.centerObject(image);
      canvas.add(image);
      canvas.renderAll();
    }
  }
  reader.readAsDataURL(e.target.files[0]);
}

Answer 3

 var canvas = new fabric.Canvas('main-canvas');
        canvas.selection = false;
        var imgElement = document.getElementById("img11");

        var imgInstance = new fabric.Image(imgElement, {
            angle: 0,
            position: 'absolute',
            opacity: 1,
            originX: 'left',
            originY:'top',
            meetOrSlice:'slice',

        });
        imgInstance.selectable = false;
        canvas.add(imgInstance);
        canvas.renderAll();