Join Justin Schwartzenberger for an in-depth discussion in this video Use a mock back end for HTTP calls, part of Angular Essential Training.
- [Instructor] To work with HTTP calls from Angular…you typically need some sort of end point to call to,…but since Angular has a powerful dependency injection engine…and the code base is built upon it…we can actually leverage that to replace Angular's…HTTP XHR Backend class…that handles the HTTP calls…and set up a mock one to simulate those calls.…The exercise files have already been set up…with a mock class for that.…If you are interested in it,…feel free to check out the mock-xhr-backend.ts file…to see what it's up to.…
This class is set up in the app…to support HTTP calls to the URL, media items,…forget posts, and delete verbs.…It will allow us to build out the media item service…to use Angular's HTTP service…while not requiring a separate API to hit.…And with Angular's DI architecture…the default HTTP XHR Backend class…is easy to replace.…Over in the app.module.ts file…we need to import the type that we are going to mock.…
The HTTP XHR Backend.…That comes from @angular/common/http.…So, we can add HttpXhrBackend to the imports list.…
Author
Justin Schwartzenberger
Updated
3/1/2018Released
10/31/2016Justin 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
- Routing
Skill Level Intermediate
Duration
Views
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.
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Introduction
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Welcome1m 27s
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Why use AngularJS 2?1m 36s
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Using the exercise files1m 51s
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Basics of TypeScript2m 24s
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Course overview1m 2s
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1. Architecture Overview
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Directives and pipes1m 40s
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Data binding1m 53s
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Dependency injection1m 54s
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Data persistence1m 47s
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Routing1m 50s
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2. Components
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NgModule and the root module5m 59s
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Component metadata2m 4s
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The component selector2m 12s
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The component template2m 59s
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Styling a component5m 3s
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Property binding2m 30s
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3. Directives and Pipes
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Structural directives: ngFor3m 34s
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Attribute directives: custom3m 53s
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Using directive values3m 36s
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Angular pipes: built in3m 1s
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Angular pipes: custom4m 28s
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4. Forms
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Angular forms1m 29s
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Template-driven forms4m 45s
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Model-driven forms4m 19s
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Validation: built in3m 28s
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Validation: custom3m 2s
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Error handling5m 10s
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5. Dependency Injection and Services
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Services in Angular2m 22s
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Class constructor injection2m 39s
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The Inject decorator3m 40s
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Injection token3m 36s
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6. HTTP
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The Angular HttpClient2m 5s
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7. Routing
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Router links2m 36s
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Conclusion
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Next steps1m 20s
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Video: Use a mock back end for HTTP calls