Code Mastery Lab • Code Mastery Lab

Mastery Track

React + Redux: Functional UI from the Ground Up

Progress Status0 / 27 Units

1. JavaScript Foundations

The React Mindset — Why UI as a Function Changes Everything

Modern JavaScript You Need for React — Variables, Arrows, and Templates

Modern JavaScript You Need for React — Destructuring, Spread, and Modules

Promises and Async JavaScript

Thinking Functionally — Immutability and Pure Functions

Functional Tools — Map, Filter, Reduce, and Composition

Assignment A: JavaScript Transformation Pipeline

2. React Core

The Virtual DOM — How React Actually Works

Your First Components — From createElement to Reusable Functions

JSX — Writing HTML-like Syntax in JavaScript

Build Tooling — Webpack and the Modern React Workflow

Assignment B: Recipe App Without a Build Tool

3. React Application Architecture

Props — Passing Data Into Components

State — Making Components Dynamic

The Component Tree — State, Data Flow, and the Color Organizer

Component Lifecycle — Mounting, Updating, and Data Fetching

Higher-Order Components — Reusing Behavior Without Inheritance

Assignment C: GitHub User Explorer (HOCs)

4. Redux State Management

Introduction to Redux — State, Actions, and Reducers

The Redux Store — Subscriptions, Middleware, and Action Creators

Connecting Redux to React — Provider and connect

Testing React and Redux

Assignment D: Professional Task Manager with Redux

5. Production Patterns

Client-Side Routing with React Router

Server-Side Rendering and Universal React

Assignment E: The Universal Blog (SSR)

Capstone Project

Capstone: Color Organizer Pro

“Mastery is not a destination, but a continuous journey of excellence.”

Course Syllabus

Mastery Track

React + Redux: Functional UI from the Ground Up

Progress Status0 / 27 Units

1. JavaScript Foundations

The React Mindset — Why UI as a Function Changes Everything

Modern JavaScript You Need for React — Variables, Arrows, and Templates

Modern JavaScript You Need for React — Destructuring, Spread, and Modules

Promises and Async JavaScript

Thinking Functionally — Immutability and Pure Functions

Functional Tools — Map, Filter, Reduce, and Composition

Assignment A: JavaScript Transformation Pipeline

2. React Core

The Virtual DOM — How React Actually Works

Your First Components — From createElement to Reusable Functions

JSX — Writing HTML-like Syntax in JavaScript

Build Tooling — Webpack and the Modern React Workflow

Assignment B: Recipe App Without a Build Tool

3. React Application Architecture

Props — Passing Data Into Components

State — Making Components Dynamic

The Component Tree — State, Data Flow, and the Color Organizer

Component Lifecycle — Mounting, Updating, and Data Fetching

Higher-Order Components — Reusing Behavior Without Inheritance

Assignment C: GitHub User Explorer (HOCs)

4. Redux State Management

Introduction to Redux — State, Actions, and Reducers

The Redux Store — Subscriptions, Middleware, and Action Creators

Connecting Redux to React — Provider and connect

Testing React and Redux

Assignment D: Professional Task Manager with Redux

5. Production Patterns

Client-Side Routing with React Router

Server-Side Rendering and Universal React

Assignment E: The Universal Blog (SSR)

Capstone Project

Capstone: Color Organizer Pro

“Mastery is not a destination, but a continuous journey of excellence.”

Unit 22 of 27

beginner

1 hr 8 min

Earn +50 XP

Testing React and Redux

Pure functions are trivially testable, and most of Redux is pure functions — which means a well-architected Redux application has very little untestable code. After this lesson you can write Jest unit tests for Redux reducers using deep-freeze to catch mutation bugs, use Enzyme to shallow-render a component and simulate click events, verify mock functions were called correctly with jest.fn(), and add a snapshot test that catches unintended UI regressions.

Core Objectives

React + Redux: Functional UI from the Ground Up

React + Redux: Functional UI from the Ground Up

Testing React and Redux

Key Takeaways

Lesson Restricted