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Fabric.js Polyline strokeWidth Property

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  • Last Updated : 24 Jan, 2021
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In this article, we are going to see how to set the stroke width of a canvas Polyline using FabricJS. The canvas Polyline means Polyline is movable and can be stretched according to requirement. Further, the Polyline 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 Polyline. After this, we will initialize instances of Canvas and Polyline provided by FabricJS and set the stroke color and stroke width of the Polyline using stroke and strokeWidth property respectively, and render the Polyline on the Canvas as given in the example below.


var polyline = new fabric.Polyline(Points, {  
   strokeWidth: number

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

  • strokeWidth: It specifies the stroke width.

The below example illustrates the strokeWidth property in Fabric.js:



<!DOCTYPE html> 
    <!-- Loading the FabricJS library -->
    <script src
  <div style="text-align: center;width: 600px;"
    <h1 style="color: green;"
        Fabric.js | Polyline strokeWidth Property 
  <canvas id="canvas"
    style="border:1px solid #000000;"
  // Initiate a Canvas instance 
  var canvas = new fabric.Canvas("canvas"); 
  // Initiate a polyline instance 
  var polyline = new fabric.Polyline([ 
      { x: 200, 
      y: 10 }, 
      {x: 250, 
      y: 50 
      }, { 
      x: 250, 
      y: 180 
      }, { 
      x: 150, 
      y: 180 
      }, { 
      x: 150, 
      y: 50 
      }, { 
      x: 200, 
      y: 10 }], { 
      stroke: 'green',  
      strokeWidth: 3,  
      fill: 'yellow',
      strokeWidth: 3   
      // Render the polyline in canvas 


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