How can I implement caching in my Angular application?

How can I implement caching in my Angular application?

You can implement caching in Angular using services like HttpClient with RxJS operators. Would you like a code example?

Yes, please provide a code example for caching HTTP requests.

Sure! You can use the tap operator to cache responses. Here's a simple example:

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable, of } from 'rxjs';
import { tap, catchError } from 'rxjs/operators';

@Injectable({ providedIn: 'root' })
export class DataService {
  private cache: any = {};

  constructor(private http: HttpClient) {}

  getData(url: string): Observable<any> {
    if (this.cache[url]) {
      return of(this.cache[url]);
    }
    return this.http.get(url).pipe(
      tap(data => this.cache[url] = data),
      catchError(error => {
        console.error('Error fetching data', error);
        return of(null);
      })
    );
  }
}

That looks great! How do I clear the cache when needed?

You can create a method in your service to delete specific entries from the cache or clear the entire cache. For example:

clearCache(url: string): void {
  delete this.cache[url];
}

clearAllCache(): void {
  this.cache = {};
}