Join Justin Schwartzenberger for an in-depth discussion in this video Using URLSearchParams, part of Angular 2 Essential Training.
- [Instructor] The get call in the MediaItemService…is currently requesting all of the mediaItems.…Let's refactor that to support URL search query values…and see how the Angular HTTP service works with those.…Angular has a URLSearchParams class…that helps with packaging up search query data.…In the MediaItemsService.ts file…we can add URLSearchParams to the import list…from the Angular HTTP scoped package.…
The mock back end supports…filtering the mediaItems list by medium,…so let's update the service get method…to take in a parameter named medium.…Then in the method we need to…create a new instance of URLSearchParams.…Setting that to a local variable named searchParams.…URLSearchParams has a method called append.…So we can call searchParams.append…and pass it the name as a String of the parameter key…and the medium from the service get parameters as the value.…
The HTTP get method…supports a second argument of request options.…This can be an object.…So let's add a second argument of an object literal.…Now the request options supports a search property…
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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