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Fabric.js | Rect lockMovementY Property

  • Last Updated : 25 May, 2020

In this article, we are going to see how to lock the vertical movement of the canvas rectangle using FabricJS. The canvas rectangle means rectangle is movable and can be stretched according to requirement. Further, the rectangle 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 rectangle. After this, we will initialize instances of Canvas and Rect provided by FabricJS and lock the vertical movement of the canvas rectangle using lockMovementY property and render the Rect on the Canvas as given in the below example.

Syntax:

fabric.Rect({
    width: number,
    height: number,
    lockMovementY: Boolean
});

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

  • width: It specifies the width of rectangle.
  • height: It specifies the height of rectangle.
  • lockMovementY: It specifies whether to lock vertical movement of canvas.

Example: This example uses FabricJS to lock the vertical movement of the canvas-like rectangle as given below.




<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        Fabric.js | Rect lockMovementY Property
    </title> 
      
    <!-- Adding the FabricJS library -->
    <script src= 
    </script> 
</head> 
  
<body> 
    <div style="text-align: center;width: 600px;">  
        <h1 style="color: green;">  
            GeeksforGeeks  
        </h1>  
        <b>  
            Fabric.js | Rect lockMovementY 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 Rect instance 
        var rectangle = new fabric.Rect({ 
            width: 200,
            height: 100,
            fill: ''
            stroke: 'green',
            strokeWidth: 3,
            lockMovementY: true
        }); 
  
        // Render the Rect in canvas 
        canvas.add(rectangle); 
        canvas.centerObject(rectangle);
    </script> 
</body> 
  
</html>

Output:




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