Join Justin Schwartzenberger for an in-depth discussion in this video The component selector, part of Angular 2 Essential Training.
- [Instructor] Angular will use the selector property…from the component metadata…to find a match in the DOM based on an element name.…If we take a look at the app component,…we can see that it has a selector with a value of 'app'.…And if we flip over to our index.html file,…we can see that we have a DOM element named app.…As we learned in an earlier lesson…Angular kicks off with the bootstrap call…that takes in an Angular root module.…
And the root module has a bootstrap metadata property…that contains a list of components to use…as the starting component.…This bootstrap process tells Angular…to look over the initial DOM on the page,…take the selector from the app component…and find the first match.…Angular finds the app element…and applies the app component to that element.…The bootstrap function will only load the component…on the first match it finds.…It will not bootstrap multiple instances…of the same component type.…
Now this is a bit different from how…components nested in components work.…This will get covered in and upcoming lesson.…
Justin 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
Skill Level Intermediate
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.
1. Architecture Overview
3. Directives and Pipes
5. Dependency Injection and Services
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