In this article, we are going to see how to set the opacity of a Textbox canvas using FabricJS. The canvas Textbox means Textbox is movable and can be stretched according to requirement. Further, the Textbox can be customized when it comes to initial stroke color, height, width, fill color, or stroke width.
Approach:
- 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 Textbox.
- After this, we will initialize instances of Canvas and Textbox provided by FabricJS and set the opacity of the Textbox using opacity property and render the Textbox on the Canvas as given in the example below.
Syntax:
fabric.Textbox('text', {
opacity: number
});Parameters: This function accepts single parameter as mentioned above and described below:
- opacity: It specifies the opacity of the canvas textbox.
Example: This example uses FabricJS to set opacity of a canvas textbox.
HTML
<!DOCTYPE html> <html>
<head>
<title>
Fabric.js | Textbox opacity Property
</title>
<!-- Adding the FabricJS library -->
<script src=
</script>
</head>
<body>
<h1 style="color: green;">
GeeksforGeeks
</h1>
<h3>
Fabric.js | Textbox opacity 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,
opacity: 0.5
});
// Render the Textbox in canvas
canvas.add(text);
canvas.centerObject(text);
</script>
</body>
</html>
|
Output: