Fabric.js | Triangle transparentCorners Property

In this article, we are going to see how to set the visibility of the corner of a canvas triangle using FabricJS. The canvas 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, fill color, stroke width, or radius.

To make it possible, we are going to use a JavaScript library called FabricJS. After importing the library using CDN, we will create a canvas block in the body tag which will contain our triangle. After this, we will initialize instances of Canvas and Triangle provided by FabricJS and set the visibility of the corner of the triangle using transparentCorners property respectively, and render the triangle on the Canvas as given in the example below.


    width: number,
    height: number,
    cornerStrokeColor: string,
    transparentCorner: boolean

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

  • width: It specifies the width of triangle.
  • height: It specifies the height of triangle.
  • cornerStrokeColor: It specifies the stroke color of the controlling corners.
  • transparentCorner: It specifies whether to make the controlling corners visible or not.

Example: This example uses FabricJS to set the visibility of the corner of a canvas triangle.





<!DOCTYPE html> 
        Fabric.js | Triangle transparentCorners Property 
    <!-- Adding the FabricJS library -->
    <script src
        <div style="text-align: center;width: 600px;"
        <h1 style="color: green;"
            Fabric.js | Triangle transparentCorners 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: 'cyan', 
                        cornerStrokeColor: 'red', 
                        transparentCorners: false 
        // Render the triangel in canvas 




My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.