What is the useState hook?

useState is a React Hook that lets you add state variables to functional components. It returns the current state value and a function to update it.

When should I use useEffect?

The useEffect hook is used to perform side effects in components, such as fetching data from an API, subscribing to events, or manually updating the DOM.

What are React Hooks?

React Hooks are functions that let you 'hook into' React state and lifecycle features from function components without needing to write a class component.

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Redux Core in React: Web Development

Learn to design robust action structures, implement pure reducer logic, and manage the unidirectional data flow that defines professional React apps.

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Core Node

Store & Logic.

The Redux core consists of the Store, Actions, and Reducers—the trinity of global state management.

1The Pure Reducer

Reducers are the brains of Redux. They are 'Pure Functions', meaning they don't produce side effects and don't change their inputs. When a reducer receives an action, it doesn't 'change' the state. It looks at the current state, applies the logic, and returns a completely new version. This allows Redux to track changes efficiently and enables features like time-travel debugging.

2Action Design

Actions are the 'Events' of your application. While only a type is required, a good action design includes a payload for the data. By using 'Action Creators', you create a clean API for your components to interact with the store. Instead of components knowing about string types, they just call a function like addTodo('Buy milk') and Redux handles the rest.