Fabric.js | Circle cornerStyle Property

In this article, we are going to see how to change the style of controlling corners of a canvas circle using FabricJS. The canvas means the circle is movable and can be stretched according to requirement. Further, the circle can be customized when it comes to initial stroke color, fill color, stroke width, or radius.

Approach: To make it possible we are going to use a JavaScript library called FabricJS. After importing the library using CDN, we will create a canvas block in the body tag which will contain our circle. After this, we will initialize instances of Canvas and Circle provided by FabricJS and change style of controlling corners of the circle using cornerStyle property and render the Circle on the Canvas as given in the example below.

Syntax:

fabric.Circle({
    radius: number,
    cornerStyle: string
}); 

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

  • radius: It specifies the radius of circle.
  • cornerStyle: It specifies the style of the controlling corners.

Example: This example uses FabricJS to change the style of controlling corners of a canvas circle. Note that you have to click on the object to see the corners.

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<!DOCTYPE html>
<html>
  
<head>
    <title>
        Fabric.js | Circle cornerStyle Property
    </title>
  
    <!-- FabricJS CDN -->
    <script src=
    </script>
</head>
  
<body>
    <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 Circle instance
        var circle = new fabric.Circle({
            radius: 50,
            cornerStyle: 'circle'
        });
  
        // Render the circle in canvas
        canvas.add(circle);
    </script>
</body>
  
</html>

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Output:

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