Fabric.js Ellipse paintFirst Property

In this article, we are going to see how to change the paintFirst property of a canvas Textbox using FabricJS. The canvas Textbox means Textbox is movable and can be stretched according to requirement. Further, the Textbox 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 which will contain the Textbox. After this, we will initialize instances of Canvas and Textbox provided by FabricJS and change the paint first property value of Textbox using paintFirst property and render the Textbox on the Canvas as given in the example below.

Syntax:

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

Parameters: This function accept 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.
paintFirst: It specifies the string value of paintFirst property.

Example: This example uses FabricJS to set the paintFirst property of a canvas ellipse.

HTML

<!DOCTYPE html> 

<html> 

<head> 

    <title> 

        Fabric.js Ellipse paintFirst Property 

    </title> 

    <!-- 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 paintFirst 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: 'green', 

            stroke: 'blue', 

            paintFirst: 'fill' 

        }); 

        // Render the ellipse in canvas  

        canvas.add(ellipse); 

        canvas.centerObject(ellipse); 

    </script> 

</body> 

</html>

Output:

Article Tags :

JavaScript

Web Technologies

Fabric.js