Variable Orientation`Const`

Orientation: {
    LANDSCAPE_LEFT: 1;
    LANDSCAPE_RIGHT: 3;
    PORTRAIT: 0;
    PORTRAIT_UPSIDE_DOWN: 2;
} = ...

Start with portrait/pointing up and increment while moving counter‑clockwise.

Mapping:

ReadonlyLANDSCAPE_LEFT: 1
Landscape: left edge up (Surface.ROTATION_90 on Android).
ReadonlyLANDSCAPE_RIGHT: 3
Landscape: right edge up (Surface.ROTATION_270 on Android).
ReadonlyPORTRAIT: 0
Portrait: top edge up (Surface.ROTATION_0 on Android).
ReadonlyPORTRAIT_UPSIDE_DOWN: 2
Upside‑down portrait: bottom edge up (Surface.ROTATION_180).

const onOrientationChange = ({ nativeEvent }) => {
  if (nativeEvent.orientation === Orientation.LANDSCAPE_LEFT) {
    // adjust your UI
  }
};

Variable OrientationConst