Fabric.js Polygon strokeWidth Property

Last Updated : 22 Jan, 2021

In this article, we are going to see how to set the stroke width of a canvas Polygon using FabricJS. The canvas rectangle means 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 which will contain the Polygon. After this, we will initialize instances of Canvas and Polygon provided by FabricJS and set the stroke color and stroke width of the Polygon using stroke and strokeWidth property respectively, 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 }],
       {
               strokeWidth: number
       });

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

strokeWidth: It specifies the stroke width.

Note: Dimension pixels is must create a polygon.

Below examples illustrate the Fabric.JS Polygon strokeWidthin 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 strokeWidth 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 }], {  
            stroke: 'green',  
            strokeWidth: 5, 
            strokeUniform: false, 
        });  
  
        // Render the polygon in canvas  
        canvas.add(polygon);  
    </script>  
</body>  
  
</html>