As you can figure out, this simply tells the window to draw itself with the top left corner sitting at points 0,0, in other words, at the top of the screen.
Of course, this could be extended to say for example, “locking” the screen while a page loads – in other words deny the scrolling ability to a user while a page’s contents is still in the process of loading.
To do this we will make use of the handy setInterval function:
Simple, but useful to be reminded of it, no? ;)