How to set the position of Textbox from left using FabricJS?

FabricJS HTML5 Canvas Javascript

In this tutorial, we are going to learn how to set the position of a Textbox from the left using FabricJS. We can customize, stretch or move around the text written in a textbox. In order to create a textbox, we will have to create an instance of fabric.Textbox class and add it to the canvas. The position from left can be changed by using the left property.

Syntax

new fabric.Textbox(text: String, { left: Number }: Object)

Parameters

text − This parameter accepts a String which is the text string that we want to display inside our textbox.
options (optional) − This parameter is an Object which provides additional customizations to our textbox. Using this parameter, properties such as colour, cursor, stroke width and a lot of other properties can be changed related to the object of which left is a property.

Options Keys

left − This property accepts a Number value which sets the left position of an object. The value determines how far from left edge of canvas, the object will be placed.

Example 1

Default placement of the textbox object

Let’s see a code example to understand the default placement of a textbox object in the canvas when its position has not been changed.


<!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 placement of the textbox object</h2>
	<p>You can see the default placement of the textbox in this example</p>
	<canvas id="canvas"></canvas>
	<script>
		// Initiate a canvas instance
		var canvas = new fabric.Canvas("canvas");
		canvas.setWidth(document.body.scrollWidth);
		canvas.setHeight(250);
		
		// Initiate a textbox object
		var textbox = new fabric.Textbox("Keep calm and keep learning.", {
		backgroundColor: "#e3dac9",
			width: 400,
			top: 70,
			fill: "green",
			stroke: "black",
		});
		
		// Add it to the canvas
		canvas.add(textbox);
	</script>
</body>
</html>

Example 2

Passing left property as key

In this example we are assigning the left property with a custom value. Since it accepts a Number, you must assign it a numerical value which will represent its position 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 left property as key</h2>
	<p>You can see that the textbox is placed at a distance of 70px from the left</p>
	<canvas id="canvas"></canvas>
	<script>
		// Initiate a canvas instance
		var canvas = new fabric.Canvas("canvas");
		canvas.setWidth(document.body.scrollWidth);
		canvas.setHeight(250);
		
		// Initiate a textbox object
		var textbox = new fabric.Textbox("Keep calm and keep learning.", {
		   backgroundColor: "#e3dac9",
		   width: 400,
		   left: 70,
		   top: 70,
		   fill: "green",
		   stroke: "black",
		});
		
		// Add it to the canvas
		canvas.add(textbox);
	</script>
</body>
</html>

Rahul Gurung

Updated on: 02-Aug-2022

170 Views

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