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Fabric.js Textbox lockScalingY Property
  • Last Updated : 20 Jan, 2021

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

Syntax:

fabric.Textbox('text', {
   lockScalingY: boolean
});

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

  • lockScalingY: It specifies whether to lock vertical scaling or not.

Example: This example uses FabricJS to lock vertical scaling of a canvas textbox.



HTML




<!DOCTYPE html>
<html>
  
<head>
    <title>
        Fabric.js | Textbox lockScalingY Property
    </title>
  
    <!-- Adding the FabricJS library -->
    <script src=
    </script>
</head>
  
<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>
  
    <h3>
        Fabric.js | Textbox lockScalingY Property
    </h3>
  
    <canvas id="canvas" width="600" height="300" 
        style="border:1px solid #000000">
    </canvas>
  
    <script>
  
        // Initiate a Canvas instance 
        var canvas = new fabric.Canvas("canvas");
  
        // Create a new Textbox instance 
        var text = new fabric.Textbox(
            'A Computer Science Portal', {
            width: 500,
            lockScalingY: true
        });
  
        // Render the Textbox in canvas 
        canvas.add(text);
        canvas.centerObject(text);
    </script>
</body>
  
</html>

Output:

full-stack-img

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