Join Justin Schwartzenberger for an in-depth discussion in this video Attribute directives: custom, part of Angular 2 Essential Training.
- [Narrator] Let's build a custom Attribute directive.…This attribute directive will handle…setting a class on the media item element,…if it has been set to a favorite or not.…We start by creating a new file…named favorite.directive.ts in the app folder.…And in there, we bring in the directive decorator…with an import statement…from the Angular core sculpt package.…Then we use the at directive decorator…and pass it an object literal…for the directive meta data.…
The selector value is going to be a string…with square brackets around it, mwfavorite.…We use the square brackets in this string…because we want the selector to find a match…on an element attribute.…And selectors are similar to the construct…for a CSS selector.…The mw prefix on the name is our own creation here.…Short for media watcher,…the same prefix we use for component selectors.…It's recommended to use a domain prefix…on directive selectors for directives that you create…to keep them unique for your application.…
Angular does this in the platform with the prefix ng.…
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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