Fabric.js Textbox lockMovementY Property

Last Updated : 22 Jan, 2021

In this article, we are going to see how to lock the vertical movement of the canvas Textbox using lockMovementY property in FabricJS. The canvas means 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 the vertical movement of the canvas Textbox using lockMovementY property and render the Textbox on the Canvas as given in the below example.

Syntax:

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

Parameters: This function accepts one parameter as mentioned above and described below:

lockMovementY: It is a boolean value that specifies whether to lock vertical movement of canvas.

Example: In this example, We will use FabricJS to lock the vertical movement of the textbox canvas as shown below.

HTML

<!DOCTYPE html> 
<html> 
  
<head> 
   <!-- Adding the FabricJS library -->
   <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js"> 
   </script> 
</head> 
  
<body> 
   <h1 style="color: green;"> 
      GeeksforGeeks 
   </h1> 
  
   <h3> 
      Fabric.js | Textbox lockMovementY 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, 
         lockMovementY: true 
      }); 
  
      // Render the Textbox in canvas  
      canvas.add(text); 
      canvas.centerObject(text); 
   </script> 
</body> 
  
</html>