State Management for Mobile

Welcome to State Management for Mobile! First, let's understand app state.

App state refers to all the data that your application needs at any given moment to display its UI and function correctly. Think of it as the memory of your app.

• User login status: Is the user logged in or not?
• Shopping cart items: What products has the user added?
• Dark mode preference: Is the app using a dark or light theme?
• Data from a server: The list of posts a user sees.

This data changes over time due to user interactions or network requests.

In simple apps, managing state might seem easy. You pass data down from a parent component to its children using properties (often called 'props').

But as apps grow, this becomes complex. Imagine a piece of data needed by many components that are far apart in your app's hierarchy. You'd have to pass that data through many intermediate components, even if they don't directly use it. This is known as 'prop drilling'.

Prop drilling makes your code harder to read, maintain, and debug. It also makes it difficult to ensure data consistency across your app.