WhatsApp will make the bottom navigation bar smarter by changing its size based on the scroll direction. This design keeps the content clean while users scroll through their chats. This is another update that makes the bottom navigation bar more modern.
WhatsApp is testing a dynamic bottom navigation bar on Android | WABetaInfo
With the WhatsApp beta for Android 2.26.41.6 update from Google Play, WhatsApp is working on a navigation bar that adapts to scrolling.
wabetainfo.com
