William Clarkson, over at PhaserGames, writes: "Sometimes just adding a sprite into a game is enough. Other times it is very useful to extend a sprite.
Why? Being able to do this will let us get super organized. That allows us to build games faster and better. We can make complex classes that extend Phaser game objects such as sprite, text or images. Most importantly we can reuse the code!
In my experience using classes allows us to do more by writing less code. If well written, the class can be transferred from one game to another without changing the code in the class.
Extending existing classes can be very powerful. I’m going to show you the basics in this post of how to extend a sprite in Phaser 3."