Fabric.js Ellipse lockSkewingY Property

Last Updated : 29 Jan, 2021

In this article, we are going to see how to lock the vertical skewing of an Ellipse canvas using Fabric.js. The Ellipse in Fabric.js is movable and can be stretched according to requirement. Further, the Ellipse can be customized when it comes to initial stroke color, height, width, fill color, or stroke width.

Approach: To make it possible, we are going to use a JavaScript library called Fabric.js. After importing the library, we will create a canvas block in the body tag which will contain the Ellipse. After this, we will initialize instances of Canvas and Ellipse provided by Fabric.js, set whether to lock the vertical skewing of the Ellipse using the lockSkewingY property and render the Ellipse on the Canvas as given in the below example.

Syntax:

fabric.Ellipse({
   rx: number,
   ry: number,
   fill: string,
   lockSkewingY: boolean
});

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

rx: It specifies the horizontal radius.
ry: It specifies the vertical radius.
fill: It specifies the color to fill the ellipse.
lockSkewingY: It specifies whether to lock vertical skewing of the Ellipse canvas or not.

Example: This example uses Fabric.js to set the vertical skewing of a canvas Ellipse as given below.

HTML

<html> 
<head> 
    <!-- FabricJS CDN -->
    <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 Ellipse lockSkewingY 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 Ellipse instance  
        var ellipse =  
            new fabric.Ellipse({ 
            rx: 150, 
            ry: 75, 
            fill: '', 
            stroke: 'green', 
            lockSkewingY: true 
        }); 
  
        // Render the circle in canvas  
        canvas.add(ellipse); 
        canvas.centerObject(ellipse); 
    </script> 
</body> 
</html>