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Fabric.js | Rect centeredRotation Property
  • Last Updated : 15 May, 2020

In this article, we are going to see how to disable the centered rotation of the canvas rectangle using FabricJS. The canvas rectangle means rectangle is movable and can be stretched according to requirement. Further, the rectangle can be customized when it comes to initial stroke color, height, width, fill color, or stroke width.

To make this possible we are going to use a JavaScript library called FabricJS. After importing the library, we will create a canvas block in the body tag which will contain the rectangle. After this, we will initialize instances of Canvas and Rect provided by FabricJS and disable the centered rotation of the canvas rectangle using centeredRotation property and render the Rect on the Canvas as given in the example below.

Syntax:

fabric.Rect({
    width: number,
    height: number,
    centeredRotation: boolean
}); 

Parameters: This function accept three parameters as mentioned above and described below:

  • width: This parameter defines the width of rectangle.
  • height: This parameter defines the height of rectangle.
  • centeredRotation: This parameter defines whether to enable or disable centered rotation.

Example: This example uses FabricJS to disable the centered rotation of canvas-like rectangle as given below. Try rotating the object after disabling centered rotation, it will use the upper-left corner as a center of rotation.




<!DOCTYPE html> 
<html
  
<head
    <title
        Fabric.js | Rect centeredRotation Property
    </title
      
    <!-- Adding the FabricJS library -->
    <script src
    </script
</head
  
<body
    <div style="text-align: center;width: 600px;">
          <h1 style="color: green;">
              GeeksforGeeks
          </h1>
          <b>
            Fabric.js | Rect centeredRotation Property
          </b>
    </div>
    <canvas id="canvas" width="600" height="200"
        style="border:1px solid #000000"
    </canvas
      
    <script
      
        // Initiate a Canvas instance 
        var canvas = new fabric.Canvas("canvas"); 
  
        // Initiate a Rect instance 
        var rectangle = new fabric.Rect({ 
            width: 200,
            height: 100,
            fill: '', 
            stroke: 'green',
            strokeWidth: 3,
            centeredRotation: true
        }); 
  
        // Render the Rect in canvas 
        canvas.add(rectangle); 
        canvas.centerObject(rectangle);
    </script
</body
  
</html>

Output:




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