title: What is the difference in sending http requests using pipe and without using pipe in Angular 5?
body: <p>In my current Angular project I am handling http requests with and without pipe.Both methods I am getting the results.So I want to know what exactly pipe will do.
  Below is my sample code.</p>
  
  <pre><code>return this.http.post(this.url, JSON.stringify({ email: email, password: password }));
  
  
  return this.http.post(API_URL+URI, model)
          .pipe(
              catchError(this.handleError('create', model))
          );
  </code></pre>