How to animate circle shape parameters using HTML5 Canvas API and JavaScript

Here I have illustrated a simple example of HTML5 Canvas. In this example you will learn how to animate circle shape parameter using HTML5 Canvas API and JavaScript.


Click on canvas to see the result.

Your browser does not support canvas tag

Click on canvas to see the result.

Download Source

So let’s start with building HTML5 Document.

Creating HTML5 Document

Defining JavaScript function and prototype for Animated Circle shape

I am using “Balloon” name for animated circle shape to avoid any predefined key word into Canvas API.
See the code below

Include Balloon.js below the “HTML Title” tag

Applying circle animation on mouse click

Include “document_script.js” below the “Canvas” tag.

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