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How to change the font size of a text canvas using Fabric.js ?
  • Last Updated : 12 May, 2020

In this article, we are going to see how to change the font size of a text canvas using FabricJS. The text canvas means text written is movable and can be stretched according to requirement. Further, the text itself cannot be edited like a textbox.

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 text. After this, we will initialize instances of Canvas and Text provided by FabricJS and use the fontSize property to change the font size and render the Canvas on the Text as given in the below example.

Syntax:

 fabric.Text(text, fontSize: number); 

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

  • text: It specifies the text to be written.
  • fontSize: It specifies the font size.

Program: This example uses FabricJS to change font size of the text canvas.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        How to change the font size of
        a text canvas using Fabric.js?
    </title>
    <!-- Loading the FabricJS library -->
    <script src=
    </script>
</head>
  
<body>
    <canvas id="canvas" width="600" height="200"
        style="border:1px solid #000000;">
    </canvas>
      
    <script>
          
        // Create a new instace of Canvas
        var canvas = new fabric.Canvas("canvas");
  
        // Create a new Textbox instance
        var text = new fabric.Text('GeeksforGeeks', {
            fontSize: 90
        });
  
        // Render the Textbox on Canvas
        canvas.add(text);
    </script>
</body>
  
</html>

Output:




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