How to upload image to canvas using Fabric.js?

Question

I want to create a process in which users can upload their images and then edit them in a browser in Canvas using Fabric.js, using some buttons - to use some effects - Fabric.js -.

I can not make it work. My HTML:

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

Javascript is as follows:

 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

 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 2

You can upload multiple images using java java, as well as drag one place to another place on the 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 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(); 

Answer 4

this code was useful to me. many thanks. it helps me.