JavaScript Screen orientationchange Event

console.log("onorientationchange" in screen);
console.log(typeof screen.onorientationchange);
console.log("Prefer screen.orientation change");

if (screen.orientation) {
  screen.orientation.addEventListener("change", function (event) {
    console.log(
      "ScreenOrientation change: " +
        event.target.type +
        ", " +
        event.target.angle +
        " degrees."
    );
  });
  console.log("Listening for orientation change…");
} else {
  console.log("screen.orientation not available");
}

try {
  screen.addEventListener("orientationchange", function () {
    console.log("legacy Screen orientationchange fired");
  });
  console.log("Attached (may never fire — deprecated)");
} catch (err) {
  console.log("Could not attach: " + err.name);
}