Fabric.js | Triangle cornerStyle Property

In this article, we are going to see how to set the style of controlling corners 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 this 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 triangle. After this, we will initialize instances of Canvas and triangle provided by FabricJS and set a corner style of controlling corners of the canvas triangle using cornerStyle property and render the triangle on the Canvas as given in the below example.


    width: number,
    height: number,
    cornerStyle: rect | circle

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.
  • cornerStyle: This parameter defines the style of the controlling corners two possible values are available rect and circle .

Example: This example uses FabricJS to set a style of controlling corners of the canvas-like triangle as given below. You have to click on the object to see the style of controlling corners.





<!DOCTYPE html> 
        Fabric.js | Triangle cornerStyle Property 
    <!-- Adding the FabricJS library -->
    <script src
        <div style="text-align: center;width: 600px;"
        <h1 style="color: green;"
            Fabric.js | Triangle cornerStyle Property 
    <canvas id="canvas" width="600" height="200"
        style="border:1px solid #000000"
        // Initiate a Canvas instance 
        var canvas = new fabric.Canvas("canvas"); 
        // Initiate a triangel instance 
        var triangle = new fabric.Triangle({
                        width: 150, 
                        height: 100, 
                        fill: '', 
                        stroke: 'green', 
                        strokeWidth: 3, 
                        cornerColor: 'blue', 
                        cornerStyle: 'circle'
        // Render the triangel in canvas 




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