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Fabric.js Polygon fill Property

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In this article, we are going to see how to set the fill color of the canvas polygon using FabricJS. The canvas polygon means the polygon is movable and can be stretched according to requirement. Further, the polygon 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 that will contain the polygon. After this, we will initialize instances of Canvas and polygon provided by FabricJS and set the fill color of the canvas triangle using fill property and render the polygon on the Canvas as given in the below example.

Syntax:

fabric.Polygon([ 
        { x: pixel, y: pixel }, 
        { x: pixel, y: pixel }, 
        { x: pixel, y: pixel}, 
        { x: pixel, y: pixel}, 
        { x: pixel, y: pixel }],
        {
                fill: string
        });

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

  • fill: It specifies the color to fill the polygon.

Note: Dimension pixels is must create a polygon.

Below examples illustrate the Fabric.JS Polygon fill property in JavaScript:

Example 1: Here we use FabricJS to set the fill with the green color of the canvas polygon.

HTML




<!DOCTYPE html> 
<html
  
<head
    <!-- Loading the FabricJS library -->
    <script src
    </script
</head
  
<body
        <div style="text-align: center;width: 600px;"
        <h1 style="color: green;"
            GeeksforGeeks 
        </h1
        <b
            Fabric.js | Polygon fill 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 }], { 
            fill: 'green' 
        }); 
  
        // Render the polygon in canvas 
        canvas.add(polygon); 
    </script
</body
  
</html>


Output:

Example 2: Here we use FabricJS to set the fill with the purple color of the canvas polygon.

HTML




<!DOCTYPE html> 
<html
  
<head
    <!-- Loading the FabricJS library -->
    <script src
    </script
</head
  
<body
        <div style="text-align: center;width: 600px;"
        <h1 style="color: green;"
            GeeksforGeeks 
        </h1
        <b
            Fabric.js | Polygon fill 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 }], { 
            fill: 'purple' 
        }); 
  
        // Render the polygon in canvas 
        canvas.add(polygon); 
    </script
</body
  
</html>


Output: 



Last Updated : 23 Aug, 2020
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