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How to flip a Circle vertically using FabricJS?
In this tutorial, we are going to learn how we can flip a Circle object vertically 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. We can flip a circle object vertically using the flipY property.
Syntax
new fabric.Circle({ flipY: Boolean }: 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 flipY is a property.
Options Keys
flipY − This property accepts a Boolean value. It allows us to flip an object vertically.
Example 1
Passing flipY as key with a 'false' value
Let's see an example that shows us the default orientation of a circle object in FabricJS. Since we are passing the flipY property a false value, the circle object will not be flipped vertically.
<!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>How to flip a Circle vertically using FabricJS?</h2> <p>This is the default orientation of the object. We have set <b>flipY</b> as False, but even if we don't use it, <b>flipY</b> will be by default set to False. </p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var circle = new fabric.Circle({ left: 215, top: 50, fill: "green", radius: 80, stroke: "#228b22", strokeWidth: 2, flipY: false }); // Create gradient fill circle.set("fill", new fabric.Gradient({ type: "linear", coords: { x1: 0, y1: 0, x2: 0, y2: 50 }, colorStops: [{ offset: 0, color: "red" }, { offset: 1, color: "green" }, ], })); // Adding them to the canvas canvas.add(circle); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html> Example 2
Passing the flipY property as key with a 'true' value
In this example, we have a circle object of radius 80px with a vertical linear gradient fill. As we apply the flipY property to the circle object, it flips vertically and thus we see that the gradient has flipped as well.
<!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>How to flip a Circle vertically using FabricJS?</h2> <p>Here observe that the circle has flipped vertically (see the gradient), as we have set <b>flipY</b> to True.</p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var circle = new fabric.Circle({ left: 215, top: 50, fill: "green", radius: 80, stroke: "#228b22", strokeWidth: 2, flipY: true }); // Create gradient fill circle.set("fill", new fabric.Gradient({ type: "linear", coords: { x1: 0, y1: 0, x2: 0, y2: 50 }, colorStops: [{ offset: 0, color: "red" }, { offset: 1, color: "green" }, ], })); // Adding them to the canvas canvas.add(circle); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>
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