Added in 2.7

on <level>:MSCROLL:<*#?=!@>:<commands>

Triggers when a user scrolls the message buffer in a window.

See also $mscroll.pos, $mscroll.max.

Parameters

<level> - The level for the event to trigger.
<*#?=!@> - The Matchtarget to listen to.
<commands> - The commands to be performed when the event listener's criteria is met.

Example

on *:mscroll:#:{
  if ($mscroll.pos == 1) {
    echo -sg scrollbar for $active is at top
  }
  else if ($mscroll.pos == $mscroll.max) {
    echo -sg scrollbar for $active is at bottom
  }
}