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Fabric.js | Triangle flipY Property
  • Last Updated : 25 May, 2020

In this article, we are going to see how to set the vertically flip of a canvas triangle in 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 use the flipY property to vertically flip the triangle and render the Canvas on the Triangle as given in the example below.

Syntax:

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

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.
  • flipY: It specifies the vertically flip of a canvas object.

Example: This example uses FabricJS to set the vertically flip of a canvas triangle.

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<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        Fabric.js | Triangle flipY Property
    </title> 
      
    <!-- Adding the FabricJS library -->
    <script src= 
    </script> 
</head> 
  
<body> 
    <div style="text-align: center;width: 600px;"
        <h1 style="color: green;"
            GeeksforGeeks 
        </h1> 
        <b> 
            Fabric.js | Triangle flipY Property 
        </b> 
    </div>
    <canvas id="canvas" width="600" height="200"
        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: 200,
            height: 150,
            fill: '',
            stroke: 'green',
            strokeWidth: 3,
            flipY: true
        });
  
        // Render the Triangle in canvas 
        canvas.add(triangle); 
        canvas.centerObject(triangle);
    </script> 
</body> 
  
</html>                 

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Output:

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