javascript - onKeyPress Vs. onKeyUp and onKeyDown

#short
#javascript
#dom
#dom-events
What is the difference between these three events? Upon googling I found that:

The onKeyDown event is triggered when the user presses a key.
The onKeyUp event is triggered when the user releases a key.
The onKeyPress event is triggered when the user presses & releases a key
(onKeyDown followed by onKeyUp).

I understand the first two, but isn't onKeyPress the same as onKeyUp? Is it possible to release a key (onKeyUp) without pressing it (onKeyDown)?
This is a bit confusing, can someone clear this up for me?