Updating a specific component in Angular without reloading the whole page can be tricky but totally doable! You’re on the right track thinking about using services and Observables!

So here’s a simple way to do it:

1. Create a Service: First, set up a service that handles the API calls. You can use Angular’s HttpClient to fetch data.

   
   import { Injectable } from '@angular/core';
   import { HttpClient } from '@angular/common/http';
   import { Observable } from 'rxjs';
   
   @Injectable({
     providedIn: 'root'
   })
   export class UserService {
     constructor(private http: HttpClient) { }
   
     getUserData(): Observable {
       return this.http.get('api/user'); // Replace with your API
     }
   }
               

2. Subscribe to the Observable in Your Component: In your component, inject the user service and call the method to get data. You can subscribe to the data so your component updates automatically when new data is available.

   
   import { Component, OnInit } from '@angular/core';
   import { UserService } from './user.service';
   
   @Component({
     selector: 'app-user-profile',
     templateUrl: './user-profile.component.html'
   })
   export class UserProfileComponent implements OnInit {
     user: User;
   
     constructor(private userService: UserService) {}
   
     ngOnInit() {
       this.userService.getUserData().subscribe(data => {
         this.user = data; // This will update your component with new user data!
       });
     }
   
     updateUser() {
       // Imagine this calls the API to save data and then fetches updated data
       this.userService.getUserData().subscribe(data => {
         this.user = data; // Refresh user data without reloading
       });
     }
   }
               

3. Using Event Emitters (if needed): If you want to send information back to a parent component, you can use Event Emitters to let the parent know about the data changes.

   
   import { EventEmitter, Output } from '@angular/core';
   
   @Output() userUpdated = new EventEmitter();
   
   updateUser() {
       this.userService.getUserData().subscribe(data => {
         this.user = data;
         this.userUpdated.emit(this.user); // Emit updated user data back to parent
       });
   }
               

To sum it up, using a service to manage your API calls and subscribing to Observables in your component is a clean and effective way to update parts of your app without a full reload. Event Emitters can be handy when you need to communicate between components.

Try to break it down into smaller steps, and you’ll get the hang of it! Good luck!