Redux

Look at redux_toolkit.md for the modern usage

Three Principles

1) The global state of your application is stored in an object tree within a single store.

2) The only way to change the state is to emit an action, an object describing what happened.

3) To specify how the state tree is transformed by actions, you write pure reducers. (pure means no random or async)

Why Redux in a World with React Context?

• You have large amounts of application state that are needed in many places in the app

• The app state is updated frequently over time

• The logic to update that state may be complex

• The app has a medium or large-sized codebase, and might be worked on by many people