Step 6
Let's implement the Sprite
class:
import Block from "./Block.js";
class Sprite extends Block {
constructor(x, y, width, height, color) {
super(x, y, width, height, color);
}
move(dx, dy) {
this.x += dx;
this.y += dy;
}
}
export default Sprite;
Notice the use of extends
keyword to use Inheritance. Also take note of the use of the keyword super
to invoke the constructor of the parent class.
The constructor of Sprite
is not needed; if we eliminate it, the constructor of the parent class is inherited. This is different from e.g. Java where you must explicitly declare (non-default) constructors.