Function SessionProvider

src/react/index.tsx:297–423

(props: SessionProviderProps)

 * [Documentation](https://next-auth.js.org/getting-started/client#sessionprovider)
 */
export function SessionProvider(props: SessionProviderProps) {
  const { children, basePath } = props

  if (basePath) __NEXTAUTH.basePath = basePath

  /**
   * If session was `null`, there was an attempt to fetch it,
   * but it failed, but we still treat it as a valid initial value.
   */
  const hasInitialSession = props.session !== undefined

  /** If session was passed, initialize as already synced */
  __NEXTAUTH._lastSync = hasInitialSession ? now() : 0

  const [session, setSession] = React.useState(() => {
    if (hasInitialSession) __NEXTAUTH._session = props.session
    return props.session
  })

  /** If session was passed, initialize as not loading */
  const [loading, setLoading] = React.useState(!hasInitialSession)

  React.useEffect(() => {
    __NEXTAUTH._getSession = async ({ event } = {}) => {
      try {
        const storageEvent = event === "storage"
        // We should always update if we don't have a client session yet
        // or if there are events from other tabs/windows
        if (storageEvent || __NEXTAUTH._session === undefined) {
          __NEXTAUTH._lastSync = now()
          __NEXTAUTH._session = await getSession({
            broadcast: !storageEvent,
          })
          setSession(__NEXTAUTH._session)
          return
        }

        if (
          // If there is no time defined for when a session should be considered
          // stale, then it's okay to use the value we have until an event is
          // triggered which updates it
          !event ||
          // If the client doesn't have a session then we don't need to call
          // the server to check if it does (if they have signed in via another
          // tab or window that will come through as a "stroage" event
          // event anyway)
          __NEXTAUTH._session === null ||
          // Bail out early if the client session is not stale yet
          now() < __NEXTAUTH._lastSync
        ) {
          return
        }

        // An event or session staleness occurred, update the client session.
        __NEXTAUTH._lastSync = now()
        __NEXTAUTH._session = await getSession()
        setSession(__NEXTAUTH._session)
      } catch (error) {