Get Started with TypeScript - Part 2 - State assigned to state

state.tsx

type State = {
  appTitle: string;
  launchImg: string;
  rocketName: string;
  missionName: string;
  missionLogo: string;
  missionDetails: string;
  missionSuccess: boolean;
  flightNumber: number;
  missionId: string;
  launchDate: string;
  payloadSize: number;
  ships: Array<string>;
  isShowingMissionData: boolean;
};

export default class RocketApp extends React.Component<{}, State> {
  state: State = {
    appTitle: 'SpaceX Launches',
    launchImg: '',
    rocketName: '',
    missionName: '',
    missionLogo: '',
    missionDetails: '',
    missionSuccess: false,
    flightNumber: 0,
    missionId: '',
    launchDate: '',
    payloadSize: 0,
    ships: [],
    isShowingMissionData: false,
  };
  ...
}