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How to set the width of stroke of Rectangle using FabricJS?
In this tutorial, we are going to learn how to set the width of stroke of a Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.
The strokeWidth property allows us to specify the width of a stroke for an object.
Syntax
new fabric.Rect( { strokeWidth: Number }: Object)
Parameters
Options (optional) This parameter is an Object which provides additional customizations to our rectangle. 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 strokeWidth is a property.
Options keys
strokeWidth This property accepts a Number which allows us to specify the width of a stroke for an object. Its default value is 1.
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 rectangle object. Since we have not used the strokeWidth property, the default width is being rendered.
<!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 the default object width of the stroke around the rectangle.</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 rectangle object
var rect = new fabric.Rect({
left: 55,
top: 70,
width: 170,
height: 70,
fill: "#f4f0ec",
stroke: "#2a52be",
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>
Example 2
Passing strokeWidth property as key
In this example, we are passing the strokeWidth property a value of 5. This will make sure that our rectangle object is rendered with a stroke that has a width of 5 pixels.
<!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 strokeWidth property as key</h2>
<p>You can now see that the stroke width is 5px wide around the rectangle.</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 rectangle object
var rect = new fabric.Rect({
left: 55,
top: 70,
width: 170,
height: 70,
fill: "#f4f0ec",
stroke: "#2a52be",
strokeWidth: 5,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>
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