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Fabric.js Image borderScaleFactor Property

  • Last Updated : 31 Aug, 2020

Fabric.js is a javascript library that is used to work with canvas. Image is one of the class of fabric.js that is used to create image instances. The borderScaleFactor property of the image is used to set the scale of the border of the image.

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 set the border scale of the image using the borderScaleFactor property of the image object.

Syntax:

fabric.Image(image, {
    borderScaleFactor: Number
});

Parameters: The above function takes two parameters as mentioned above and described below:

  • image: This parameter takes the image.
  • borderScaleFactor: This sets the scale of the border of the image.

Example 1: The example given below uses Fabric.JS to set the scale of the border of the canvas image as shown in the below given example.






<!DOCTYPE html> 
<html
  
<head
    <!-- Adding the FabricJS library --> 
    <script src
    </script
</head
  
<body
    <h1 style="color: green;">GeeksforGeeks</h1
    <b>Fabric.js | Image borderScaleFactor Property </b
  
    <canvas id="canvas" width="400" height="300"
        style="border:2px solid #000000"
    </canvas
  
    <img src =
        width="100" height="100" id="my-image">
      
    <script
      
        // Create the instance of canvas object
        var canvas = new fabric.Canvas("canvas"); 
        var img= document.getElementById('my-image');
        var imgInstance = new fabric.Image(img, {
            borderScaleFactor: 50
        });
        canvas.add(imgInstance);
    </script
</body
  
</html>

Output:

Example 2:




<!DOCTYPE html> 
<html
  
<head
    <!-- Adding the FabricJS library --> 
    <script src
    </script
</head
  
<body
    <h1 style="color: green;">GeeksforGeeks</h1
    <b>Fabric.js | Image borderScaleFactor Property </b
  
    <canvas id="canvas" width="300" height="250"
        style="border:2px solid #000000"
    </canvas
  
    <img src =
        width="100" height="100" id="my-image"
        style="display:none">
    <br>
  
    <button onclick="func()">Clickme</button>
  
    <script
  
        // Create the instance of canvas object
        var canvas = new fabric.Canvas("canvas"); 
        var img= document.getElementById('my-image');
        var imgInstance = new fabric.Image(img, {
            borderScaleFactor: 2
        });
        canvas.add(imgInstance);
        func=()=>{
            var imgInstance = new fabric.Image(img, {
                borderScaleFactor: 20
            });
            canvas.clear();
            canvas.add(imgInstance);
        }
    </script
</body>
   
</html>

Output:




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