如何在頁面刷新後保持狀態不變？

Question

大家好，我正在努力尋找一種方法來在頁面刷新後保留我的狀態值。目前，我將值儲存在本機儲存中，我嘗試了許多解決方案來使用戶在頁面重新載入後保持登入狀態仍然無法運作。每次當我刷新頁面時我都會退出，我將非常感謝任何幫助。非常感謝。

Core.ts：

#

class Core {
      agv: typeof agv;
      auth: Auth;
      workflow: WorkflowApi;
      graphql: GraphQLSdk;
      fleetState: Stream<FleetState>;
      taskList: Stream<TaskList>;
      zoneList: Stream<ZoneList>;

  configuration = getConfiguration();

  url: string;

  constructor(options: Options) {
    const auth = getAuth(options);
    const graphqlUrl = `${options.host}/graphql`;
    const graphql = getSdk(new GraphQLClient(graphqlUrl, { fetch: authMiddleware({ auth, fetch: options.fetch }) }));

    const streamContext = {
      ...options,
      headers: getAuthHeaders(auth),
      getSites: () => auth.session.value?.sites || [],
    };

    this.auth = auth;
    this.workflow = getWorkflowApi({ auth }) ;
    this.graphql = graphql;
    this.fleetState = fleetState.call({
      ...options,
      headers: getAuthHeaders(auth),
      getSites: () => auth.session.value?.sites || [],
    });

    this.configuration.map.fetch = this.configuration.map.fetch.bind(async () => {
      const site = auth.session.value.sites[0];
      return graphql.map({ site }).then(({ map }) => map);
    });

    this.taskList = taskList.call(streamContext);
    this.zoneList = zoneList.call(streamContext);

    this.agv = {
      ...agv,
      graphql,
      map: this.configuration.map,
      getSites: () => auth.session.value?.sites || [],
    } as typeof agv;

    auth.session.listen(session => {
      window.localStorage.setItem('session', JSON.stringify(session));
      console.log(session);
      if (session) {
    this.configuration.map.fetch();
      }
    });
  }
}

export { Core };

Answer 1

如果會話持久化到localStorage，如下

auth.session.listen(session => {
  window.localStorage.setItem('session', JSON.stringify(session));
  ...
})

那麼我認為你可以從getAuth中的localStorage進行初始化，如下所示

function getAuth({ host, fetch }: Dependencies) {
  const session = getEventEmitter({
    initialValue: JSON.parse(window.localStorage.getItem("session")),
  });

  ...

如果沒有會話保持在狀態，則 null 是表達式的值，並以 initialValue 形式傳回。