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Fabric.js Polyline lockSkewingX Property

  • Last Updated : 22 Jan, 2021
Geek Week

In this article, we are going to see how to lock horizontally skewing of a 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, set whether to lock the horizontal skewing of the Polyline using lockSkewingX property and render the Polyline on the Canvas as given in the below example.

Syntax:

var polyline = new fabric.Polyline(Points, {  
    lockSkewingX: Boolean
});  

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

  • lockSkewingX: It is a boolean value that specifies whether to lock the horizontally skewing of a canvas or not.

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



Example:

HTML




<!DOCTYPE html>
<html>
  
<head>
    <!-- Loading the FabricJS library -->
    <script src=
    </script>
</head>
  
<body>
    <div style="text-align: center;width: 600px;">
        <h1 style="color: green;">
            GeeksforGeeks
        </h1>
  
        <b>
            Fabric.js | Polyline lockSkewingX Property
        </b>
    </div>
  
    <canvas id="canvas" width="600" height="400" 
        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: 300,
            y: 60
        }, {
            x: 350,
            y: 100
        }, {
            x: 350,
            y: 230
        }, {
            x: 250,
            y: 230
        }, {
            x: 250,
            y: 100
        }, {
            x: 300,
            y: 60
        }], {
  
            // Disable skewing 
            // along the x-axis 
            lockSkewingX: true
        });
  
        // Render the polyline in canvas 
        canvas.add(polyline);
    </script>
</body>
  
</html>

Output:

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