Testing PWA + Windows Dark Mode

This is a test to demonstrate how a PWA can respond to Windows’ Dark Mode.

if ( window.Windows )
{
  var uiSettings = new Windows.UI.ViewManagement.UISettings();
  var color = uiSettings.getColorValue( Windows.UI.ViewManagement.UIColorType.background );
  if ( color.r == 0 && color.g == 0 && color.b == 0 )
  {
    // Dark mode
  }
  else
  {
    // Light mode (default)
  }
}