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Fabric.js Circle visible Property

  • Last Updated : 25 Jan, 2021

In this article, we are going to see how to set the visibility of a canvas Circle using FabricJS. The canvas means 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 size.

Approach:

  • To make it possible we are going to use a JavaScript HTML5 canvas 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 set the visibility of the canvas Circle using visible property and render the Circle on the Canvas as given in the example below.

Syntax:

fabric.Circle({
   radius: number,
   visible: boolean
});

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

  • radius: It specifies the radius of circle.
  • visible: It specifies the visibility of the object.

Example: This example uses FabricJS to set the visibility of the canvas Circle .

HTML




<!DOCTYPE html>
<html>
  
<head>
    <title>
        Fabric.js Circle visible Property
    </title>
  
    <!-- FabricJS CDN -->
    <script src=
    </script>
</head>
  
<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>
  
    <h3>
        Fabric.js Circle visible Property
    </h3>
  
    <canvas id="canvas" width="600" height="300"
        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: 100,
            fill: '',
            stroke: 'green',
            strokeWidth: 3,
            visible: false
        });
  
        // Render the circle in canvas 
        canvas.add(circle);
        canvas.centerObject(circle);
    </script>
</body>
  
</html>

Output:




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