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How to create a Textbox with background colour using FabricJS?
In this tutorial, we are going to create a Textbox with background colour 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. The backgroundColor property allows us to assign a colour to our object’s background and it is rectangular in shape for the textbox.
Syntax
new fabric.Textbox(text: String, { backgroundColor: String }: 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 Textbox of which backgroundColor is a property.
Options Keys
backgroundColor − This property accepts a String value which determines the background colour.
Example 1
Passing backgroundColor property as key with a hexadecimal value
Let’s see a code example to assign a background colour to our Textbox object using hexadecimal value of colour. In this example we have used the hex colour code "#ffe4e1" which is a very light shade of red.
<!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 backgroundColor property as key with a hexadecimal value</h2>
<p>You can see that the background colour is a very light shade of red.</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("Details matter, it's worth waiting to get it right.", {
backgroundColor: "#ffe4e1",
width: 400,
top: 70,
left: 110,
});
// Add it to the canvas
canvas.add(textbox);
</script>
</body>
</html>Example 2
Passing backgroundColor property as key with a rgba value
We can use an RGBA value, instead of a hexadecimal colour code, which stands for − red, green, blue and alpha. The alpha parameter specifies the opacity of a colour. In this example, we have used the rgba value (0,206,209,0.4) which is the colour dark turquoise with 0.4 opacity.
<!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 backgroundColor property as key with an RGBA value</h2>
<p>You can see that the background colour is a dark turquoise colour with 0.4 opacity.</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("Details matter, it's worth waiting to get it right.", {
backgroundColor: "rgba(0,206,209, 0.4)",
width: 400,
top: 70,
left: 110,
});
// Add it to the canvas
canvas.add(textbox);
</script>
</body>
</html>
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