Understanding and Using ngRx in Angular

Introduction

• ngRx is a framework for managing state in Angular applications.
• Essential to understand Redux before using ngRx.

What is Redux?

• Redux is a state management tool for a single flow of data.
• Involves state, actions, and components interacting.

What is ngRx?

• ngRx is an implementation of Redux for Angular.
• Useful for global state management and handling asynchronous operations.

Why Use ngRx?

• Provides a structured approach to state management.
• Necessary for applications with many components and modules.
• Popular in Angular applications.

Implementing ngRx in Angular

Required Packages

1. ngRix Store: Main package to bring ngRx into the app.
2. ngRix Store DevTools: For debugging.
3. ngRix Effects: For handling asynchronous operations.

Setup

• Install packages using Yarn.
• Bind ngRx to the Angular application via the app module.
• Use storeModule.forRoot() to initialize ngRx.

Creating State and Actions

• State Management
  • Define global state.
  • Use slices for different modules.
• Actions
  • Define user events that modify the state.

Creating Reducers

• Reducers change state based on actions.
• Use createReducer() and on() functions to define state changes.

Using Redux DevTools

• Bind store dev tools to monitor state changes.
• Debugging via state inspection.

Creating and Using Selectors

• Selectors extract properties from the state.
• Defined using createSelector().

Implementing Effects

• Effects manage asynchronous operations.
• Defined in a class using createEffect().
• Utilize RxJS operators like mergeMap and catchError.

Binding ngRx to Components

• Dispatch actions in components.
• Use selectors to bind component properties to the state.

Conclusion

• ngRx provides a robust framework for state management in Angular.
• Essential for scalability and maintainability in large applications.
• Learning takes practice, but it simplifies complex state management.

Further Learning

• Check additional resources or videos for more advanced topics like animations in Angular.