What are the limits of the Full screen Widget?

Question

I want to use the Full Screen Widget for Apps I'm embedding on web-pages using the billboard theme.
I'm doing this by embedding the app inside an iFrame, however the Full Screen Widget appears to be disabled from inside this iframe (works fine launching the app direct).

I can hover over the icon, but there's no action on click

As well as this, the widget seems to disappear from my app when the frame is sized relatively small.
Are there any guidelines for what size this widget will disappear at?

I want my maps/apps to be around 400x600px inside a web page.

Any help would be much appreciated.

Cheers,
Kieran

DavidColey · Answer

Sorry meant to reply here:

I see the full screen button in Chrome on my Android, as above.  I am using a Nexus 6, Android 7.1.1

DavidColey · Answer

I see the full screen button in Chrome on my Android, as above.  I am using a Nexus 6, Android 7.1.1

berniejconnors · Answer

David, I completely agree that the Full Screen widget is more important and useful on mobile than on desktop screens.  I too have noticed that Chrome on Android does not have a full screen mode (at time of writing, 2019-10-05).  I did some testing and loaded several other mobile browsers on my Android phone today:

* Chrome – no full screen mode
Google Go - no full screen mode
Firefox - no full screen mode
Opera - full screen mode available, a button appears in the lower right corner when in Landscape orientation
Opera Mini - full screen mode available, a button appears in the lower right corner when in Landscape orientation
Edge - full screen mode available, use finger to drag upward over the address bar when in Landscape orientation. I found it tricky to activate full screen mode.
Duck-DuckGo - full screen mode available in both orientations, just drag upwards to hide address bar, but a downward motion when panning the map will also unhide the address bar and it can be annoying.