NgRx is a powerful state management library for Angular applications. It helps manage the state of large applications more efficiently and predictably. This page provides an overview of advanced concepts in NgRx that can help you master its usage.

Key Advanced Concepts

  1. Selective NGRX Store Reducer

    • Description: This concept allows you to create a store that contains only a subset of the global state, which can be useful for modularizing your application.
    • Use Case: You can isolate the state of a feature within your application, making it easier to manage and test.

  2. Custom Selectors

    • Description: NgRx provides a way to create custom selectors that allow you to extract specific pieces of data from the store.
    • Use Case: This is useful when you need to compute derived data that is not directly stored in the state.

  3. Effect Handling

    • Description: NgRx uses effects to handle asynchronous operations, such as API calls or other side effects.
    • Use Case: Effects are a key part of NgRx and are used to dispatch actions that change the state of the application.

  4. Time Travel Debugging

    • Description: NgRx integrates with Redux DevTools, which allows for time-travel debugging of the application's state history.
    • Use Case: This is particularly useful for debugging and understanding the flow of state changes in your application.

Example Usage

Here's an example of how you might use NgRx to manage a list of todos:

  • State: The state of the todos is stored in a slice of the global state.
  • Actions: Actions such as ADD_TODO, REMOVE_TODO, and TOGGLE_TODO are dispatched to the store.
  • Reducer: The reducer handles these actions and updates the state accordingly.
  • Effects: Effects are used to handle asynchronous operations, such as fetching todos from an API.

NgRx State Management Diagram

For more detailed information and tutorials on NgRx, please visit our NgRx Documentation.

If you're interested in learning more about Angular, check out our Angular Tutorials.