Function snapshotForID

snapshotForID(id: number, keepTransparency?: boolean): Promise<HSImage>
Capture the current on-screen contents of the window with the given ID. Requires Screen Recording permission.
Parameters
- id: number
  The window's underlying ID (see the id property on hs.window objects).
- OptionalkeepTransparency: boolean
  Whether to preserve the window's alpha channel. If false (the default), transparent regions are filled with an opaque black background.
Returns Promise<HSImage>
Resolves with the captured image, or rejects if no window with that ID can be found, or the capture fails.