Hi, S uchoss!

You can check my new article where I might have a better explanation of it. I’ll have to read through this article and see if I can update it now that I have a better grasp of it. It can be a bit confusing. :)

Game Development: Tetris in Angular

We need to bind the call to this, or it has the window object as its context. Since it doesn't contain the paint function, we get an error.

paint() {
  // drawing logic
  requestAnimationFrame(this.paint.bind(this));
}