What are advanced selectors in NgRx?

What are advanced selectors in NgRx?

Advanced selectors in NgRx are functions that help you derive and compute state from the store, allowing for more efficient state management.

Can you give me an example of how to create an advanced selector?

Sure! You can create an advanced selector using the createSelector function from NgRx. For example:

import { createSelector } from '@ngrx/store';

const selectFeature = (state) => state.feature;

export const selectItems = createSelector(
  selectFeature,
  (feature) => feature.items
);

How do advanced selectors improve performance?

They improve performance by memoizing the results, meaning they only recompute when the input state changes, reducing unnecessary recalculations.

What are some best practices for using advanced selectors?

Some best practices include keeping selectors pure, using memoization effectively, and composing selectors to create more complex state queries.