Fabric.js Triangle visible Property

Last Updated : 22 Jan, 2021

In this article, we are going to see how to set the visibility of a canvas Triangle using Fabric.js. The Triangle in Fabric.js is movable and can be stretched according to requirements. Further, the Triangle can be customized when it comes to initial stroke color, fill color, stroke width, or size.

To make it possible we are going to use a JavaScript library called Fabric.js. After importing the library using a 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 Fabric.js, set the visibility of the Triangle using visible property, and render the Triangle on the Canvas as given in the example below.

Syntax:

fabric.Triangle({
   width: number,
   height: number,
   visible: boolean
});

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

width: It specifies the width of the triangle.
height: It specifies the height of the triangle.
visible: It specifies the visibility of the triangle.

Example: This example uses Fabric.js to set the visibility of the Triangle.

HTML

<html> 
<head> 
    <!-- Adding the FabricJS library -->
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js"> 
    </script> 
</head> 
<body> 
    <h1 style="color: green;"> 
        GeeksforGeeks 
    </h1> 
    <h3> 
        Fabric.js | Triangle visible Property 
    </h3> 
    <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, 
            visible: true 
        }); 
  
        // Render the Triangle in canvas  
        canvas.add(triangle); 
        canvas.centerObject(triangle); 
    </script> 
</body> 
</html>