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Fabric.js Group borderScaleFactor Property

Last Updated : 29 Jan, 2021
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In this article, we are going to see how to set the borderScaleFactor of a Group canvas using Fabric.js. The Group in Fabric.js is movable and can be stretched according to requirements. Further, the Group 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 Fabric.js. After importing the library, we will create a canvas block in the body tag that will contain the Group. After this, we will initialize instances of Canvas and Group provided by Fabric.js and set the border scaling factor of the canvas Group using the borderScaleFactor property.


fabric.Group([canvas1, canvas2], {
    borderScaleFactor: Number

Parameters: This property accepts a single parameter as mentioned above and described below:

  • borderScaleFactor: It specifies the border scaling of the canvas Group. It contains a Number value.

Below examples illustrate the use of Fabric.js Group borderScaleFactor property in JavaScript:



<!DOCTYPE html>
    <!-- FabricJS CDN -->
    <script src=
    <div style="text-align: center;width: 400px;">
        <h1 style="color: green;">
            Fabric.js | Group borderScaleFactor Property
    <div style="text-align: center;">
        <canvas id="canvas" width="500" height="300"
            style="border:1px solid green;">
        // Initiate a Canvas instance
        var canvas = new fabric.Canvas("canvas");
        // Initiate a circle instance
        var circle = new fabric.Circle({
            radius: 100,
            fill: 'lightgreen',
            scaleY: 0.6,
            originX: 'center',
            originY: 'center',
        // Initiate a text instance
        var text = new fabric.Text('GeeksforGeeks', {
            fontSize: 25,
            originX: 'center',
            originY: 'center'
        // Initiate a Group instance
        var group = new fabric.Group([ circle, text ], {
            borderScaleFactor: 5
        // Render the Group in canvas
        // Center the Group in canvas


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