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Fabric.js Polygon stroke Property

Last Updated : 20 Jan, 2021
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In this article, we are going to see how to set the stroke color 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.

Approach:

  • 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 of the Polygon using stroke 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 }
],
{
    stroke: string
});

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

  • stroke: It specifies the stroke color.

Below examples illustrate the Fabric.JS Polygon stroke in JavaScript:

Example:

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 stroke 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',
                stroke: 'blue',
             paintFirst: 'fill',
        }); 
  
        // Render the polygon in canvas 
        canvas.add(polygon); 
    </script
</body
  
</html>


Output:



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