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How to add dashed stroke to a Textbox using FabricJS?
In this tutorial, we are going to learn how to add a dashed stroke to a Textbox 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 strokeDashArray property allows us to specify a dash pattern for the object's stroke.
Syntax
new fabric.Textbox(text: String, { strokeDashArray: Array }: 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 strokeDashArray is a property.
Options Keys
strokeDashArray − This property accepts an Array which allows us to specify a dash pattern for the object’s stroke. For example, if we pass an array with the values [2,3], it means a dash pattern of 2px dash and 3px gap and repeating this pattern infinitely.
Example 1
Default appearance of an object’s stroke
Let’s see a code example that depicts the default appearance of the stroke of a textbox object. Since we have not used the strokeDashArray property, there is no dash pattern being displayed.
<!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 an object’s stroke</h2>
<p>You can see there is no dash pattern in the stroke</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("Stay foolish to stay sane", {
backgroundColor: "#e3dac9",
width: 400,
top: 70,
left: 65,
fill: "green",
stroke: "black",
});
// Add it to the canvas
canvas.add(textbox);
</script>
</body>
</html>Example 2
Passing strokeDashArray property as key
In this example, we are passing the strokeDashArray property a value of [9,2]. This means that a dash pattern will be created such that there is a 9px long line, followed by a 2px gap, then again a 9px long line will be drawn, and so on.
<!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 strokeDashArray property as key</h2>
<p>You can see there is a dash pattern in the stroke now</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("Stay foolish to stay sane", {
backgroundColor: "#e3dac9",
width: 400,
top: 70,
left: 65,
fill: "green",
stroke: "red",
strokeDashArray: [9, 2],
});
// Add it to the canvas
canvas.add(textbox);
</script>
</body>
</html>
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