Learning Angular 2 Directives (Video 9)

This video tutorial covers the implementation of filtering functionality in Angular 2 using pipes. It begins with an introduction to pipes, explaining their purpose and how they differ from Angular 1 filters. The tutorial then guides viewers through creating a custom pipe, integrating it with components, and building a sensor filter component. The video concludes with finalizing the filter functionality and demonstrating how to refresh the application to see the filtered results. Key concepts include Angular 2 pipes, component integration, and creating reusable components.

What is the main purpose of using pipes in Angular 2?

• To create new components

• To filter and transform data

• To manage application state

• To handle user input

Which symbol is used to express a pipe in Angular 2?

• Colon (:)

• Ampersand (&)

• Semicolon (;)

• Vertical bar (|)

What is the role of the transform function in a custom pipe?

• To initialize the component

• To transform the input value

• To handle user events

• To manage application routing

What must be done to use a custom pipe in a component?

• Reference it in the component's pipes property

• Import it in the component's module

• Declare it in the component's template

• Add it to the component's styles

How can you make a pipe stateless in Angular 2?

• By using the immutable property

• By using the stateful property

• By using the async property

• By using the pure property

What is the purpose of using template variables in Angular 2?

• To define component styles

• To manage application state

• To handle HTTP requests

• To reference DOM elements

How can you notify a component of filter changes in Angular 2?

• By using a service

• By using an event emitter

• By using a directive

• By using a template variable