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How to create a canvas with Textbox using FabricJS?
In this tutorial, we are going to learn about how to create a canvas with a Textbox object using FabricJS. We can customize, stretch or move around the text written in a textbox. We can also customize the text itself by using properties like fontSize, fontFamily, fontStyle, fontWeight, etc. In order to create a textbox, we will have to create an instance of fabric.Textbox class and add it to the canvas.
Syntax
new fabric.Textbox( text: String, options: 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 colour, cursor, stroke width and a lot of other properties can be changed related to the textbox object.
Example 1
Creating an instance of fabric.Textbox() and adding it to our canvas
Let’s see a code example of how we can add a textbox to our canvas. Here we have created an object with a width of 210 px and font size as 20 px. Also, we have used the font family "Helvetica" which is a sans serif font.
<!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>Creating an instance of fabric.Textbox() and adding it to our canvas</h2>
<p>You can see textbox has been added to our canvas</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("He who is brave is free.", {
top: 70,
left: 80,
width: 400,
fontSize: 20,
padding: 10,
fontFamily: "Helvetica",
});
// Add it to the canvas
canvas.add(textbox);
</script>
</body>
</html>Example 2
Manipulating the Textbox object by using the set method
In this example, we have assigned the properties to the textbox by using the set method which is a setter for values. Any property related to stroke, strokeWidth, angle, scaling, rotation, etc., can be mutated by using this method.
<!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>Manipulating the Textbox object by using the set method</h2>
<p>You can select the textbox to move it around the canvas</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("He who is brave is free.");
// Set the properties
textbox.set("top", 70);
textbox.set("left", 65);
textbox.set("fill", "#ff69b4");
textbox.set("fontWeight", "bold");
textbox.set("backgroundColor", "black");
textbox.set("width", 400);
// Add it to the canvas
canvas.add(textbox);
</script>
</body>
</html>
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