How to make full screen mode in pygbag?

When I open the pygame html page created with pygbag, the console opens in full screen and the pygame window is in the corner: (see image below)

How can I make the pygbag window open in full screen?

Solution

Short answer, you cannot, no web browser will allow your code to switch to fullscreen on page load without user intervention.

So now the default in pygbag is "fullscreen windowed" : that way pygame screen is always maximized inside the page which seems a good trade off.

To get console back, just add #debug to the url

but once user is -already- interacting with pygame, you can call real full screen via python with same code you would use on desktop.