kotlin-electron/electron.core/BrowserWindow/isFullScreen

isFullScreen

open override fun isFullScreen(): Boolean(source)

Whether the window is in fullscreen mode.

Note: On macOS, fullscreen transitions take place asynchronously. When querying for a BrowserWindow's fullscreen status, you should ensure that either the 'enter-full-screen' or 'leave-full-screen' events have been emitted.