react-native-vision-camera/package/src/JSIHelper.ts

import { CameraRuntimeError } from './CameraError'

export function assertJSIAvailable(): void {
  // Check if we are running on-device (JSI)
  // @ts-expect-error JSI functions aren't typed
  if (global.nativeCallSyncHook == null) {
    throw new CameraRuntimeError(
      'system/frame-processors-unavailable',
      'Failed to initialize VisionCamera Frame Processors: React Native is not running on-device. Frame Processors can only be used when synchronous method invocations (JSI) are possible. If you are using a remote debugger (e.g. Chrome), switch to an on-device debugger (e.g. Flipper) instead.',
    )
  }
}