Redux

The first of such tools is, of course, Redux. It is one of the most popular tools for managing state in complex JavaScript applications, especially when used with React. Redux provides predictable state management by maintaining the application’s state in a single global object, simplifying the tracking of changes and data management.

Redux is based on three core principles: a single source of truth (one global state), the state is read-only (immutable), and changes are made using pure functions (reducers). These principles ensure an orderly and controlled data flow.

function counterReducer(state = { count: 0 }, action) {
  switch (action.type) {
    case 'INCREMENT':
      return { count: state.count + 1 };
    case 'DECREMENT':
      return { count: state.count - 1 };
    default:
      return state;
  }
}
const store = createStore(counterReducer);
store.subscribe(() => console.log(store.getState()));
store.dispatch({ type: 'INCREMENT...