Join Justin Schwartzenberger for an in-depth discussion in this video Using HTTP for GET calls, part of Angular 2 Essential Training.
- [Instructor] Angular has a class named HTTP…that is a service for making HTTP request calls…and returning HTTP responses.…Let's refactor the media-item service class…to use the HTTP class to make a get request…for the media items.…In the media-item service ts file,…we need to start by importing HTTP from…the Angular HTTP scoped package.…
Then we need a 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 HTTP.…So we have a constructor requesting the HTTP 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 scoped package.…
We can add an import statement for that.…And then decorate the service class with…@injectable and a pair of parentheses.…This decorator doesn't need any arguments passed to it.…It handles letting Angular know that the class it decorates…
Justin Schwartzenberger steps through the framework one feature at a time, focusing on the new component-based architecture of Angular 2. You'll 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
1. Architecture Overview
3. Directives and Pipes
5. Dependency Injection and Services
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