This course is a beginner's gateway into the mechanics of using Redux as an application building platform. It takes a bottom-up approach, enforcing the basic aspects of Redux before incorporating them together in a creative and interactive way. It begins with a short theoretical section before moving on to application based problems. 
The course does assume that the user has a basic idea of how React works, as Redux works in the React environment. Let's dive in!

Understanding Redux: A Beginner's Guide To State Management

Previously, we dispatched the action to the `activeUserID` reducer, but the reducer had not been told what to do with it.

Let’s fix this, but don’t forget to remove the `console.log(user_id)` after inspecting the logs.

Have a look at the `activeUserId` reducer:

A dispatched action must be recognized by the reducer so that it can perform further actions. For our setActiveUserID, let's use the reducer to return the payload from the setUserID action i. e. the user id. 

Dispatch Recognition

A dispatched action must be recognized by the reducer so that it can perform further actions. For our setActiveUserID, let's use the reducer to return the payload from the setUserID action i. e. the user id.

Getting to know Redux (Theory)

Your First Redux Application

Understanding State Updates with Actions

Building Skypey: A More Advanced Example

Building Skypey: Designing the State Object

Building Skypey: The User Component

Building Skypey: The Empty Screen

Building Skypey: The Chat Window

Building Skypey: Header and Chat Window

Building Skypey: Messaging

The Skypey App

Dispatch Recognition