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How to set stroke width of a canvas circle using Fabric.js ?

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In this article, we are going to see how to set the stroke width of a canvas circle using FabricJS. The canvas means the circle is movable and can be stretched according to requirement. Further, the circle can be customized when it comes to initial stroke color, fill color, stroke width or radius.

Approach: To make it possible, we are going to use a JavaScript library called FabricJS. After importing the library using CDN, we will create a canvas block in the body tag which will contain our circle. After this, we will initialize instances of Canvas and Circle provided by FabricJS and set stroke color and stroke width of the circle using stroke and strokeWidth property respectively and render the Circle on the Canvas as given in the example below.


    radius: number,
    stroke: string,
    strokeWidth: number

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

  • radius: It specifies the radius.
  • stroke: It specifies the stroke color.
  • strokeWidth: It specifies the stroke width.

Example: This example uses FabricJS to set stroke width of a canvas circle. 

<!DOCTYPE html>
        How to set stroke width of a 
        canvas circle using FabricJS?
    <!-- FabricJS CDN -->
    <script src=
    <canvas id="canvas" width="600" height="200" 
        style="border:1px solid #000000">
        // Initiate a Canvas instance
        var canvas = new fabric.Canvas("canvas");
        // Initiate a Circle instance
        var circle = new fabric.Circle({
            radius: 50,
            stroke: "red",
            strokeWidth: 10
        // Render the circle in canvas


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Last Updated : 12 May, 2020
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