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

In this article, we are going to see how to set the absolutePositioned of a canvas triangle using FabricJS. It is meaningful only when the object is used as clipPath. 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 absolute position of a canvas triangle using absolutePositioned property.

Syntax:

fabric.Triangle({
    width: number,
    height: number,
    top: number,
    left: number,
    absolutePositioned: boolean
});

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.
  • top: It specifies the relative distance from the top of the edge.
  • left: It specifies the relative distance from the left of the edge.
  • absolutePositioned: It specifies the absolute position of the object. It contains a boolean value.

Example: This example uses FabricJS to set the absolute position of created simple canvas triangle.

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<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        Fabric.js | Triangle absolutePositioned 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 absolutePositioned 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: 300,
            height: 150,
            fill: '',
            stroke: 'green',
            strokeWidth: 3,
            absolutePositioned: true
        });
  
        // Render the Triangle in canvas 
        canvas.add(triangle); 
        canvas.centerObject(triangle);
    </script> 
</body> 
  
</html>

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Output:

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