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Window: screen property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The Window property screen returns a
reference to the screen object associated with the window. The screen
object, implementing the Screen interface, is a special object for
inspecting properties of the screen on which the current window is being rendered.
js
if (screen.pixelDepth < 8) {
// use low-color version of page
} else {
// use regular, colorful page
}