Fabric.js Polyline selectionBackgroundColor Property

Last Updated : 24 Jan, 2021

In this article, we are going to see how to change the selected background color of the canvas Polyline using Fabric.js. The Polyline in Fabric.js 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 Fabric.js. After importing the library, we will create a canvas block in the body tag that will contain the Polyline. After this, we will initialize instances of Canvas and Polyline provided by Fabric.js, use the selectionBackgroundColor property to change the selected background color, and render the Polyline on the Canvas as given in the example below.

Syntax:

var polyline = new fabric.Polyline(Points, {  
  selectionBackgroundColor: string
});

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

selectionBackgroundColor: It specifies the color of selection background.

The below example illustrates the selectionBackgroundColor Property in Fabric.js. Note that you have to click on the object to see its selection background color.

Example:

HTML

<html> 
<head> 
  <!-- Loading the FabricJS library -->
  <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js"> 
  </script> 
</head> 
<body> 
  <div style="text-align: center;width: 600px;"> 
    <h1 style="color: green;"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      Fabric.js | Polyline selectionBackgroundColor Property 
    </b> 
  </div> 
  <canvas id="canvas" width="600" height="200" 
          style="border:1px solid #000000;"> 
  </canvas> 
  <script> 
    // 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', 
      selectionBackgroundColor: '#e1e1e1' 
    }); 
  
    // Render the polyline in canvas  
    canvas.add(polyline);  
  </script> 
</body> 
</html>