I am trying to use React Native's PanResponder. In its callback functions there are two parameters that can be invoked: event and gestureState. If I log the event.nativeEvent, and the gestureState object there are keys which have the same values (eg. pageX and moveX), and there are different keys. What I don't understand is the reason for using 2 callback parameters and not one object containing all the keys. I'm sure it must have its reasons, but what are those? Can somebody explain it and give some examples?
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