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Fabric.js | Triangle borderDashArray Property

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In this article, we are going to see how to set the dash pattern of the border of the 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 the dash pattern of the border of the canvas triangle using borderDashArray property and render the Triangle on the Canvas as given in the below example.


    width: number,
    height: number,
    borderDashArray: Array

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

  • width: It specifies the width of triangle.
  • height: It specifies the height of triangle.
  • borderDashArray: This parameter defines the dash pattern of border.

Example: This example uses FabricJS to set the dashed pattern of the border of a canvas triangle as given below. Note that you have to click on the triangle to see the border.

<!DOCTYPE html> 
        Fabric.js | Triangle borderDashArray Property
    <!-- Adding the FabricJS library -->
    <script src= 
       <h1 style="color: green;">
        Fabric.js | Triangle borderDashArray Property
    <canvas id="canvas" width="600" height="300"
        style="border:1px solid #000000"
        // 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,
            borderDashArray: [5]
        // Render the Triangle in canvas 


Last Updated : 29 May, 2020
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