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Fabric.js Triangle top Property

  • Last Updated : 22 Jan, 2021

In this article, we are going to see how to position canvas Triangle relative to the top 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 radius.

To make it possible we are going to use a JavaScript library called Fabric.js. 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 Fabric.js, set the position relative to top using strokeWidth property and render the Triangle on the Canvas as given in the example below.

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Syntax:

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

Parameters: This property 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 position of the canvas triangle relative to top.

Example: This example uses Fabric.js to set the top position of a canvas triangle.

HTML




<html>
<head>
    <!-- Adding the FabricJS library -->
    <script src=
    </script>
</head>
<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>
    <h3>
        Fabric.js | Triangle top 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,
            top: 100
        });
  
        // Render the Triangle in canvas 
        canvas.add(triangle); 
    </script>
</body>
</html>

Output:




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