Hi, allHow can I simply make a full screen app? I change the color of header, to see if it is full-screen, but not. I add cordova-plugin-fullscreen to my config.xml, and also set <preference name="fullscreen" value="true" />
Not completely what you are trying and doing.
But give it a shot answering: headers/footers are managed in the Layout of the page. To completely eliminate them; create or alter an existing template by removing top & bottom regions