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How to set the position of Image from left using FabricJS?
In this tutorial, we are going to learn how to set the position of Image from left using FabricJS. We can create an Image object by creating an instance of fabric.Image. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties like angle, opacity etc. In order to set the position of Image from left, we use the left property.
Syntax
new fabric.Image( element: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | String, { left: Number }: Object, callback: function)
Parameters
-
element ? This parameter accepts HTMLImageElement, HTMLCanvasElement, HTMLVideoElement or String which denotes the image element. The String should be a URL and would be loaded as an image.
-
options (optional) ? This parameter is an Object which provides additional customizations to our object. Using this parameter origin, stroke width and a lot of other properties can be changed related to the image object of which left is a property.
-
callback (optional) ? This parameter is a function which is to be called after eventual filters are applied.
Options Keys
-
left ? This property accepts a Number which allows us to set the distance from left of the canvas for image.
Default appearance of the Image object
Let's see a code example to understand how the image object looks when the left property is not used.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Default appearance of the Image object</h2>
<p>You can see the default appearance of Image object</p>
<canvas id="canvas"></canvas>
<img src="https://www.tutorialspoint.com/images/logo.png" id="img1" style="display: none" />
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiating the image element
var imageElement = document.getElementById("img1");
// Initiate an Image object
var image = new fabric.Image(imageElement, {
top: 50,
});
// Add it to the canvas
canvas.add(image);
</script>
</body>
</html>
Passing the left property as key with a custom value
In this example, we are assigning a value of 100 to the left property. This will make sure that our image object is placed at a 100px distance from the left.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Passing the left property as key with a custom value</h2>
<p>
You can see that the Image object is placed at a distance of 100px from the left
</p>
<canvas id="canvas"></canvas>
<img src="https://www.tutorialspoint.com/images/logo.png" id="img1" style="display: none" />
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiating the image element
var imageElement = document.getElementById("img1");
// Initiate an Image object
var image = new fabric.Image(imageElement, {
top: 70,
left: 100,
});
// Add it to the canvas
canvas.add(image);
</script>
</body>
</html>
Key Points
- The left property accepts a numeric value in pixels
- When left is not specified, the image defaults to position 0 (far left)
- You can combine left with other positioning properties like top for precise placement
- The positioning is relative to the canvas boundaries
Conclusion
The left property in FabricJS provides precise control over horizontal positioning of Image objects. By setting different numeric values, you can place images at any desired distance from the left edge of the canvas.
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