State Sharing in React

State Sharing explains what to do when more than one component needs the same data.

What each lesson covers:

• Application State Management: Shared state, state ownership, lifting state up, keeping parent and child in sync, where to place state, local versus global state, and how to choose an approach.
• Context API: Why context exists, prop drilling, creating a context, Providers, reading values with useContext, sharing state across components, when to use context, a theme example and performance tips.

You learn to keep state as close as possible to where it is used, and to reach for context only when passing props becomes painful.

Every page runs real React in your browser. Edit the code and see the result next to it. Each lesson ends with exercises that check what your app shows, not how your code is written.

Lessons in this section

1. Application State Management

   Shared state, state ownership, lifting state up, managing shared state, keeping parent and child in sync, where to place state, local vs global state, and choosing an approach.

2. Context API

   Why context exists, prop drilling, creating context, Providers, reading with useContext, sharing state across components, when to use context, global state basics, a theme example and performance tips.