Fabric.js Polygon visible Property

Last Updated : 22 Jan, 2021

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

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 Polygon. After this, we will initialize instances of Canvas and Polygon provided by FabricJS and set the visibility of the canvas Polygon using visible property, and render the Polygon on the Canvas as given in the example below.

Syntax:

fabric.Polygon([  
       { x: pixel, y: pixel },  
       { x: pixel, y: pixel },  
       { x: pixel, y: pixel},  
       { x: pixel, y: pixel},  
       { x: pixel, y: pixel }],
       {
               visible: boolean
       });

Parameter: This property accepts a single parameter as mentioned above and described below:

visible: It specifies the visibility of Polygon.

Note: Dimension pixels is must create a polygon.

Below examples illustrate the Fabric.JS Polygon visiblein JavaScript:

Example:

HTML

<!DOCTYPE html>  
<html>  
  
<head>  
    <!-- Loading the FabricJS library -->
    <script src=  
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js">  
    </script>  
</head>  
  
<body>  
        <div style="text-align: center;width: 600px;">  
        <h1 style="color: green;">  
            GeeksforGeeks  
        </h1>  
        <b>  
            Fabric.js | Polygon visible 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 polygon instance  
        var polygon = new fabric.Polygon([  
        { x: 295, y: 10 },  
        { x: 235, y: 198 },  
        { x: 385, y: 78},  
        { x: 205, y: 78},  
        { x: 355, y: 198 }] 
        visible: false,);  
  
        // Render the polygon in canvas  
        canvas.add(polygon);  
    </script>  
</body>  
  
</html>