Anil Singh | Code-sample.com

How do you perform Error handling in Angular? If the Angular request fails on the server due to network issues or anything bad happen in your apps then HttpClient will return an error object instead of a successful response. If getting an error or fails your request, you just need to handle this error in the component by passing the error object as a second callback to subscribe () method. Let's see an example -   //fetch courses data   fetchCourses () {       this .c oursesService . getCourses ()       . subscribe (         ( data : Courses ) => this . courses = { … data }, // If success          error => this . error = error // If got an error       );   } It’s always a good idea to give meaningful feedback instead of displaying the error object returned from HttpClient . ...