In this video, learn how to build a custom pipe by using the @Pipe decorator and write a transform method.
- [Instructor] Creating your own custom pipes … in Angular is fairly trivial, … basically involving a decorator with a bit of metadata … and a known method signature on a class. … Let's build a custom pipe for the application … that will display a list of all of the unique … media item categories for the media items … currently displayed on the screen. … We start by creating a new file … named category-list.pipe.ts in the app folder. … We need to use the pipe decorator, … which is in the Angular core scope package, … so let's import that. … And then add @Pipe with the parentheses. … The pipe decorator accepts an object of metadata, … similar to component and directive decorators. … There are two properties available: name and pure. … We use an object literal … and we set name to a string value of categoryList. … This is the name we use in our templates. … The other property, pure, … helps define if a pipe is stateless or stateful. … Pure means that the pipe will take in data … and will return data without any side effects, …
- What is Angular?
- Working with components
- Binding events and properties
- Getting data to components
- Using directives and pipes
- Creating Angular forms
- Validating form data
- How Angular does dependency injection
- Making HTTP calls
- Styling components
Skill Level Intermediate
Angular: Building an Interfacewith Ray Villalobos2h 20m Intermediate
1. Architecture Overview
3. Directives and Pipes
5. Dependency Injection and Services
8. Styling Components
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