Fabric.js Image lockRotation Property

Last Updated : 31 Aug, 2020

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 lockRotation property of the image is used to enable or disable the rotation 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 then use the lockRotation property to enable or disable the rotation of the canvas image. After this render the image on the canvas and try to rotate the image.

Syntax:

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

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

image: This parameter takes the image element.
lockRotation: This parameter takes a boolean value to enable or disable the rotation of the canvas image.

Example: This example uses FabricJS to enable or disable the rotation of the canvas image as shown in the below given example.

HTML

<!DOCTYPE html>  
<html>  
   
<head>  
    <!-- Adding the FabricJS library -->
    <script src=  
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js">  
    </script>  
</head>  
  
<body>  
    <h1 style="color: green;"> 
        GeeksforGeeks 
    </h1>  
    <b>  
        Fabric.js | Image lockRotation Property   
    </b>  
  
    <canvas id="canvas" width="400" height="300"
        style="border:2px solid #000000">  
    </canvas>  
  
    <img src = 
"https://media.geeksforgeeks.org/wp-content/uploads/20200327230544/g4gicon.png"
        width="100" height="100" id="my-image"
        style="display: none;"> 
    <br>  
  
    <script>  
       
        // Create 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 imgInstance = new fabric.Image(img, { 
        }); 
  
        function lockRotation(){ 
            imgInstance = new fabric.Image(img, { 
                lockRotation:true 
            }); 
            canvas.clear(); 
            // Rendering the image to canvas 
            canvas.add(imgInstance); 
        } 
  
        lockRotation(); 
    </script>  
</body>  
  
</html>