How to create a cloned image object using FabricJS?

In this tutorial, we are going to show how you can create a cloned image object using FabricJS. We can create an Image object by creating an instance of fabric.Image. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties like angle, opacity etc. In order to create a cloned image object, we use the cloneAsImage method.

Syntax

cloneAsImage(callback: function, options: Object): fabric.Object

Parameters

callback (optional) − This parameter is a function which is to be invoked with a cloned image instance as the first argument.
options (optional) − This parameter is an optional Object which provides additional customizations to our clone image. Using this parameter we can set a multiplier, crop the clone image or remove the current object transform.

Without using the cloneAsImage method

Example

Let’s see a code example of how the Image object appears when the cloneAsImage method is not used. In this case, the instance of fabric.Image itself will be present in our canvas.


<!DOCTYPE html>
<html>
<head>
   <!-- Adding the Fabric JS Library-->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
   <h2>Without using the cloneAsImage method</h2>
   <p>You can see that the image instance has been formed</p>
   <canvas id="canvas"></canvas>
   <img src="https://www.tutorialspoint.com/images/logo.png" id="img1" style="display: none" />
   <script>
      // Initiate a canvas instance
      var canvas = new fabric.Canvas("canvas");
      canvas.setWidth(document.body.scrollWidth);
      canvas.setHeight(250);
      
      // Initiating the image element
      var imageElement = document.getElementById("img1");
      
      // Initiate a shadow object
      var shadow = new fabric.Shadow({
         color: "#308080",
         blur: 3,
      });
      
      // Initiate an Image object
      var image = new fabric.Image(imageElement, {
         top: 50,
         left: 110,
         skewX: 20,
         shadow: shadow,
      });
      
      // Add it to the canvas
      canvas.add(image);
   </script>
</body>
</html>

Using the cloneAsImage method

Example

In this example, we have used the cloneAsImage method to demonstrate that we can create the clone of an instance of fabric.Image by using a callback method. We will further add that cloned image to the canvas.


<!DOCTYPE html>
<html>
<head>
   <!-- Adding the Fabric JS Library-->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
   <h2>Using the cloneAsImage method</h2>
   <p>You can see that a clone image instance has been formed</p>
   <canvas id="canvas"></canvas>
   <img src="https://www.tutorialspoint.com/images/logo.png" id="img1" style="display: none" />
   <script>
      // Initiate a canvas instance
      var canvas = new fabric.Canvas("canvas");
      canvas.setWidth(document.body.scrollWidth);
      canvas.setHeight(250);
      
      // Initiating the image element
      var imageElement = document.getElementById("img1");
      
      // Initiate a shadow object
      var shadow = new fabric.Shadow({
         color: "#308080",
         blur: 3,
      });
      
      // Initiate an Image object
      var image = new fabric.Image(imageElement, {
         top: 50,
         left: 110,
         skewX: 20,
         shadow: shadow,
      });
      
      // Using cloneAsImage method
      image.cloneAsImage(function(Img) {
         canvas.add(Img);
      });
   </script>
</body>
</html>