control scroll of div

[Viktor Dušenka]

hello is the any option how to controll corrent height of scrollbar in selected div ?
something like:
if is scrolling div[id=ctnt] ?
 control if pageYOffset is min?
   do action

[ckirkendall]

Can you give me a better idea on what you are trying to do.  There are ways to listen for scroll events and trigger actions but without more information I am not sure exactly how to help.

Creighton

[Viktor Dušenka]

idea is to load new message when i reach with scrollbar the top of div where are loaded messages

[ckirkendall]

This is actually a fairly hard problem.  The easiest way is to use elementFromPoint (https://developer.mozilla.org/en-US/docs/Web/API/document.elementFromPoint).  Pick a point just inside the top corner of the div.  Check to see if the top element in the div is returned by this check.  You would need to fire the check on the event type :scroll.  Hope that helps.

CK

[Viktor Dušenka]

Thanks a much. I will try it, how it works and i'm sorry for late answer