I am looking at and there are some notable changes.

Tapping a destination results in one of the following:

  • It takes the user to the screen associated with it
  • On a visited section, it returns the user to their previous scroll position there
  • On the current section, it scrolls the page back to the top and may refresh it
  • On Android, the Back button does not navigate between bottom navigation destinations.

30;The bottom navigation bar remains in view when navigating through an ’s hierarchy.

So now the recommended approach is more or less exactly how iOS has worked. I am glad at least they describe the preferred because every application behaves differently and even Google apps with bottom tabs are totally inconsistent. I know is not a “Bible” but the navigation should at least behave consistently.

Of course the new Navigation component doesn’t adhere to the new Material Design spec (yet).

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