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How to set the width of stroke of Circle using FabricJS?
In this tutorial, we are going to learn how to add a dashed stroke to a Circle using FabricJS. Circle is one of the various shapes provided by FabricJS. In order to create a circle, we will have to create an instance of fabric.Circle 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.Circle( { strokeWidth: Number }: Object)
Parameters
options (optional) − This parameter is an Object which provides additional customizations to our circle. 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 value 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 that depicts the default appearance of the stroke of a circle 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>Setting the width of stroke of circle using FabricJS</h2> <p>Notice the outline border of the circle. This is the default thickness of outline. Here we have not used the <b>strokeWidth</b> property, but by default, it is set to 1. </p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var cir = new fabric.Circle({ left: 215, top: 40, fill: "#adff2f", radius: 100, stroke: "#228b22", //strokeWidth: 1 }); // Adding it to the canvas canvas.add(cir); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>
Example 2
Passing strokeWidth property as key
In this example, we are passing the strokeWidth property with a value of 5. This will make sure that our circle 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>Setting the width of stroke of circle using FabricJS</h2> <p>Notice the outline border of the circle. Here we have used the <b>strokeWidth</b> property and assigned it a value of 5.</p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var cir = new fabric.Circle({ left: 215, top: 40, fill: "#adff2f", radius: 100, stroke: "#228b22", strokeWidth: 5 }); // Adding it to the canvas canvas.add(cir); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>