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Fabric.js Image transparentCorners Property

  • Last Updated : 29 Jan, 2021

Fabric.js is a JavaScript library that is used to work with canvas. The canvas image is one of the class of fabric.js that is used to create image instances. The canvas image means the Image is movable and can be stretched according to requirement. The transparentCorners property is used to set if corners are transparent or not.

Approach: First import the fabric.js library. After importing the library, create a canvas block in the body tag which will contain the image. After this, initialize an instance of Canvas and image class provided by Fabric.JS and use the transparentCorners property to set if corners are transparent or not. After this render the image on the canvas.

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Syntax:

fabric.Image(image, {
    transparentCorners : Boolean
});

Parameters: This function takes a single parameter as mentioned above and described below:



  • transparentCorners : This parameter takes a boolean value to set the transparency of the canvas image.

Example: This example uses FabricJS to set the transparentCorners property of the canvas image as shown in the below example:

HTML




<!DOCTYPE html> 
<html
  
<head
    <!-- Adding the FabricJS library -->
    <script src
    </script
</head
  
<body
    <h1 style="color: green;"
        GeeksforGeeks 
    </h1
  
    <b
        Fabric.js | Image transparentCorners Property 
    </b
      
    <canvas id="canvas" width="400" height="300"
        style="border:2px solid #000000"
    </canvas
  
    <img src
        width="100" height="100" id="my-image"
        style="display: none;"
    <br
  
    <button onclick="gfg()">Clickme</button
  
    <script
  
        // Creating the instance of canvas object 
        var canvas = new fabric.Canvas("canvas"); 
  
        // Getting the image 
        var img = document.getElementById('my-image'); 
  
        // Creating the image instance 
        var geeks = new fabric.Image(img, { 
        }); 
  
        function gfg() { 
            geeks = new fabric.Image(img, {  
               transparentCorners: true
            }); 
            canvas.clear(); 
  
            // Rendering the image to canvas 
            canvas.add(geeks); 
  
            canvas.centerObject(geeks); 
        
        canvas.add(geeks); 
        canvas.centerObject(geeks); 
    </script
</body
  
</html>

Output:

Example:This example uses FabricJS to set the transparentCorners property of the canvas image as shown in the below example:

HTML




<!DOCTYPE html> 
<html
  
<head
    <!-- Adding the FabricJS library -->
    <script src
    </script
</head
  
<body
    <h1 style="color: green;"
        GeeksforGeeks 
    </h1
  
    <b
        Fabric.js | Image transparentCorners Property 
    </b
      
    <canvas id="canvas" width="400" height="300"
        style="border:2px solid #000000"
    </canvas
  
    <img src
        width="100" height="100" id="my-image"
        style="display: none;"
    <br
  
    <button onclick="gfg()">Clickme</button
  
    <script
  
        // Creating the instance of canvas object 
        var canvas = new fabric.Canvas("canvas"); 
  
        // Getting the image 
        var img = document.getElementById('my-image'); 
  
        // Creating the image instance 
        var geeks = new fabric.Image(img, { 
        }); 
  
        function gfg() { 
            geeks = new fabric.Image(img, {  
               transparentCorners: false
            }); 
            canvas.clear(); 
  
            // Rendering the image to canvas 
            canvas.add(geeks); 
  
            canvas.centerObject(geeks); 
        
        canvas.add(geeks); 
        canvas.centerObject(geeks); 
    </script
</body
  
</html>

Output:




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