In this video, Aviv Ben-Yosef privides a peek under Angular's hood to show how components are implemented and how they are mapped to directives behind the scenes.
- [Instructor] Components are just clean wrappers…around directives.…Syntactic sugar that cuts some boilerplate code…by providing good defaults.…Let's peak under the hood…to realize how Angular maps components…into directives behind the scenes.…Defining a simple component looks like this.…Note, that Angular allows defining components…with simple objects.…There's no need to provide a factory function,…which then returns the directive definition object.…Simply pass the component definition object directly.…
The implementation of Angular's component function…looks somewhat like this after a bit of simplification.…Let's review.…First, components are always restricted…to the element level, meaning components can't be used…to create the equivalent of attribute directives.…Components also always use 'conterollerAs' syntax…using the default name, '$ctrl'.…Helping to reduce mistakes,…they come with 'bindToController'…already turned on and always have their own isolated scopes.…
As you may have noticed, the previous steps taken…
Aviv Ben-Yosef kicks off the course by explaining what's different in Angular 1.6, as well the different motives for upgrading. Next, he walks through how to safely upgrade an existing app. He covers going from controllers to directives, as well as component lifecycle hooks. He also goes into the architectural changes in Angular, such as one-way data flow and immutability. To wrap up, he discusses how to properly test components.
- Deciding to upgrade an existing app
- Upgrading to Angular 1.6
- Removing standalone controllers
- Using directives as route targets
- Converting a controller's code
- Converting a controller's template
- Comparing directives and components
- Converting a directive
- Reviewing the concept of one-way binding
Skill Level Intermediate
AngularJS 1: Building a Data-Driven Appwith Ray Villalobos2h 15m Intermediate
1. Controllers to Directives
2. Use controllerAs
Convert a controller’s code1m 57s
3. Directives to Components
4. Component Lifecycle Hooks
5. One-Way Data Binding
6. Testing Components
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