Fabric.js | Rect transparentCorners Property

In this article, we are going to see how to set the visibility of the corner of a 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 it 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 set the visibility of the corner of the canvas rectangle using transparentCorners property, and render the Rect on the Canvas as given in the example below.

Syntax:

fabric.Rect({
    width: number,
    height: number,
    transparentCorners: Boolean
});

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

  • width: It specifies the width of rectangle.
  • height: It specifies the height of rectangle.
  • transparentCorners: It specifies whether to enable visibility of the corner or not.

Example: This example uses FabricJS to set the visibility of the corner of a canvas circle.

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<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        Fabric.js | Rect transparentCorners 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 transparentCorners 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,
            transparentCorners: false
        }); 
  
        // Render the Rect in canvas 
        canvas.add(rectangle); 
        canvas.centerObject(rectangle);
    </script> 
</body> 
  
</html>

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Output:

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