The Filter Drawer is very similar in some ways to both the Filter Overlay
and the Filter Form. Like the Overlay and Form, it requires an extra
tap of “apply” or “done” to get the filtered results. Its main distinction
is that it appears to slide out from the current screen, thus allowing the
user to stay in context with the search results being refined. Ideally,
the Filter Drawer will reveal a glimpse of the results behind it.
In the Target app for iOS, the Filter Drawer slides down, completely
obscuring the search results. Once the drawer is closed, there is no
indication which filters have been applied. The only feedback that filtering
is active is that the label “filter” is now blue.