[setting.component.ts]

  TagList = [];

  public getTagList() {
    this.settingService.getTags()
      .subscribe((response) => {
        this.TagList = response.data;
        console.log(this.TagList);  //A
    });
    console.log(this.TagList);  //B
  }

setting.service.ts

public getTags(): Observable<any> {
     return this.http.get<any>(`${this.appConfig.apiUrl}/setting/setting/`, { withCredentials: true });
}

as shown in the figure, the data returned by background can be printed normally at A
but B is undefined, some friends say it is asynchronous, and B uses setTimeout as well as undefined. Thank you