Master Web Development with MERN Stack for Designing, Testing, and Deploying Professional-Grade Applications using MongoDB, Express, React, and Node.js. This book covers all the top technologies in the javascript ecosystem: MongoDB, ExpressJS, ReactJS and NodeJS. With these technologies, we can create a completely functional web application that includes frontend, backend and database. We will build a fairly large production-ready app in this book. Here, we will first learn to set up the frontend with React, then create the backend APIs with NodeJS and Express. The backend will be connected to our database which is MongoDB. We will learn to use authentication in our project by implementing JWT. We will also learn to test both frontend and backend using the Unit testing framework of Jest. Finally, we will learn how to deploy both frontend and backend with ease to use free apps. After going through the book, the readers will be able to create any MERN app with ease and can also modify the project in the book to create other apps. In the Frontend section, you'll construct a dynamic ReactJS application with a focus on creating components, and pages, and establishing Redux for state management. This book will guide you through setting up Redux, implementing registration and login functionalities, and refining your application with a user-friendly dashboard and task form. The book concludes with chapters on frontend and backend testing, ensuring the robustness of your application, and also covers deployment strategies for both frontend and backend components, providing a comprehensive guide to showcase your application to the world.