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Fabric.js ActiveSelection dirty Property

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  • Last Updated : 31 Jul, 2021
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Fabric.js is a JavaScript library that is used to work with canvas. The canvas ActiveSelection is one of the class of Fabric.js that is used to create ActiveSelection instances. The canvas ActiveSelection means the ActiveSelection is movable and can be stretched according to requirement. In this article we will be using dirty property.

Approach: First import the Fabric.js library. After importing the library, create a canvas block in the body tag that will contain the ActiveSelection. After this, initialize an instance of Canvas and ActiveSelection class provided by Fabric.js and use the dirty property.

Syntax:

fabric.ActiveSelection(ActiveSelection, {
  dirty: boolean
});

Parameters: This function takes a single parameter as mentioned above and described below:

  • dirty: This parameter takes a boolean value.

 

Example: This example uses Fabric.js to set the dirty property of the canvas ActiveSelection as shown in the below example.

HTML




<!DOCTYPE html>
<html>
  
<head>
    <!-- FabricJS CDN -->
    <script src=
    </script>
</head>
  
<body>
    <div style="text-align: center; width: 400px;">
        <h1 style="color: green;">
            GeeksforGeeks
        </h1>
  
        <b>
            Fabric.js | ActiveSelection dirty Property
        </b>
    </div>
  
    <div style="text-align: center;">
        <canvas id="canvas" width="500" height="500"
            style="border:1px solid green;">
        </canvas>
    </div>
  
    <img src=
        width="100" height="100"
        id="my-image" style="display: none;">
          
    <script>
        var canvas = new fabric.Canvas("canvas");
  
        // Getting the image 
        var img = document.getElementById('my-image');
  
        // Creating the image instance 
        var geek = new fabric.Image(img, {
        });
  
        canvas.add(geek);
  
        var geek = new fabric.IText('GeeksforGeeks', {
        });
        canvas.add(geek);
        canvas.centerObject(geek);
  
        var gfg = new fabric.ActiveSelection(
            canvas.getObjects(), {
            dirty: false
        });
        console.log(gfg.dirty)
        canvas.setActiveObject(gfg);
        canvas.requestRenderAll();
        canvas.centerObject(gfg);
    </script>
</body>
  
</html>

Output:


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