Window.screen

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.

返回当前 window 的 screen 对象。screen 对象实现了Screen接口，它是个特殊的对象，返回当前渲染窗口中和屏幕有关的属性。

screenObj = window.screen;

if (screen.pixelDepth < 8) {
  // use low-color version of page
} else {
  // use regular, colorful page
}

TBD