Fabric.js | Triangle strokeDashArray Property

Last Updated : 29 May, 2020

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

Syntax:

fabric.Triangle({
    width: number,
    height: number,
    stroke: string,
    strokeDashArray: array
});

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

width: It specifies the width of triangle.
height: It specifies the height of triangle.
stroke: It specifies the stroke color.
strokeDashArray: It specifies the stroke dash pattern.

Example: This example uses FabricJS to set the stroke dash pattern of a canvas triangle.

<!DOCTYPE html>  
<html>  
  
<head>  
    <title>  
        Fabric.js | Triangle strokeDashArray Property 
    </title>  
      
    <!-- Adding the FabricJS library --> 
    <script src=  
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js">  
    </script>  
</head>  
  
<body>  
    <center> 
       <h1 style="color: green;"> 
        GeeksforGeeks 
       </h1> 
       <b> 
        Fabric.js | Triangle strokeDashArray Property 
       </b> 
    </center> 
    <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 triangle instance  
        var triangle = new fabric.Triangle({ 
            width: 300, 
            height: 150, 
            fill: '', 
            stroke: 'green', 
            strokeWidth: 3, 
            strokeDashArray: [10] 
        }); 
  
        // Render the Triangle in canvas  
        canvas.add(triangle);  
        canvas.centerObject(triangle); 
    </script>  
</body>  
  
</html> 