DesktopCapturerSource Object

• string - The identifier of a window or screen that can be used as a chromeMediaSourceId constraint when calling navigator.getUserMedia. The format of the identifier will be window:XX:YY or screen:ZZ:0. XX is the windowID/handle. YY is 1 for the current process, and 0 for all others. ZZ is a sequential number that represents the screen, and it does not equal to the index in the source’s name.
• thumbnail - A thumbnail image. Note: There is no guarantee that the size of the thumbnail is the same as the thumbnailSize specified in the options passed to . The actual size depends on the scale of the screen or window.
• NativeImage - An icon image of the application that owns the window or null if the source has a type screen. The size of the icon is not known in advance and depends on what the application provides.