Hide the mouse cursor with CSS

I know you can change the mouse cursor using CSS, but I never realized that you can actually hide it altogether.

#selector {
    cursor: none;

Of course, that doesn't mean you should, it just means you can. Practical uses for this are definitely limited, but things like mouse-based games come to mind.

What other use cases can you think of for hiding the mouse cursor?

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Creator of Surreal CMS and other web things. Follow me for tweets about JavaScript, CSS, and web programming.