Join Justin Schwartzenberger for an in-depth discussion in this video Use the HttpClient for GET calls, part of Angular 2 Essential Training.
- [Instructor] Angular has a class named HTTP Client,…that is a service for making HTTP request calls…and returning HTTP responses.…Let's refactor the mediaItemService class…to use the HTTP client class to make a get request…for the mediaItems.…In the media-item.service.ts file,…we need to start by importing HttpClient…from @angular/common/http.…
Then we need constructor that takes in http,…adding the typescript access modifier of private…to take advantage of the property initialization shortcut,…and setting the type to HttpClient.…So we have a constructor requesting the HttpClient type…but since this is a service we built,…Angular does not know to do constructor injection on it,…but there's a decorator we can use to let it know.…It's the injectable decorator and it's located…in the Angular core scope package.…
We can add an import statement for that,…and then decorate the service class with @Injectable.…This decorator doesn't need any arguments passed with it.…It handles letting Angular know…that this class it decorates…
Justin Schwartzenberger steps through the framework one feature at a time, focusing on the component-based architecture of Angular. Learn what Angular is and what it can do, as Justin builds a full-featured web app from start to finish. After mastering the essentials, you can tackle the other project-based courses in our library and create your own Angular app.
- What is Angular?
- Setting up an Angular template
- Creating a component
- Binding events and properties
- Getting data to components
- Using directives and pipes
- Creating Angular forms
- Validating form data
- Understanding dependency injection
- Providing services
- Making HTTP calls
Skill Level Intermediate
Q: This course was updated on 03/01/2018. What changed?
A: The following topics were updated: directives and pipes, forms, dependency injection and services, HTTP, and routing.
1. Architecture Overview
3. Directives and Pipes
5. Dependency Injection and Services
Router links2m 36s
Next steps1m 20s
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.