Screen

The full width and height of the screen in pixels, regardless of what the operating system or browser occupies.

var width = await screen.GetWidth();
var height = await screen.GetHeight();

The screen area actually available to windows, excluding permanent or semipermanent OS interface features such as the Windows Taskbar or the macOS Dock.

var availableWidth = await screen.GetAvailableWidth();
var availableHeight = await screen.GetAvailableHeight();

The color depth and bit depth of the screen, in bits per pixel. On virtually all modern hardware both report 24 or 30.

var colorDepth = await screen.GetColorDepth();
var pixelDepth = await screen.GetPixelDepth();

Reports whether the user's desktop spans more than one screen - useful before offering multi-window or presentation features.

var isExtended = await screen.IsExtended();

Fires when the screen changes in some way - width or height, available area, color depth or orientation. The returned subscription detaches the listener when disposed.

var subscription = await screen.SubscribeChange(() =>
{
    // width, height, color depth or orientation changed
});

// later, when no longer needed:
await subscription.DisposeAsync();

If you prefer explicit ids over disposable subscriptions, AddChange returns a Guid that can later be passed to RemoveChange, and RemoveAllChanges drops every listener registered on this instance.

// register and keep the id
var id = await screen.AddChange(OnScreenChange);

// remove a single listener by id
await screen.RemoveChange(id);

// or drop every registered listener at once
await screen.RemoveAllChanges();