OptionaldpiThe window's DPI; left out without a WebView.
Optionaldpidpi / 96; left out without a WebView.
Always true here; a failed call resolves with ApiFailure instead.
The Windows text size as a factor, 1 to 2.25, which the host applies to its WebViews together with the DPI; 1 when Windows does not report one.
The zoom factor; 1 is 100 %.
Successful response from
window.getZoom.