Book Image

MERN Quick Start Guide

By : Eddy Wilson Iriarte Koroliova
3 (1)
Book Image

MERN Quick Start Guide

3 (1)
By: Eddy Wilson Iriarte Koroliova

Overview of this book

The MERN stack is a collection of great tools—MongoDB, Express.js, React, and Node—that provide a strong base for a developer to build easily maintainable web applications. With each of them a JavaScript or JavaScript-based technology, having a shared programming language means it takes less time to develop web applications. This book focuses on providing key tasks that can help you get started, learn, understand, and build full-stack web applications. It walks you through the process of installing all the requirements and project setup to build client-side React web applications, managing synchronous and asynchronous data flows with Redux, and building real-time web applications with Socket.IO, RESTful APIs, and other concepts. This book gives you practical and clear hands-on experience so you can begin building a full-stack MERN web application. Quick Start Guides are focused, shorter titles that provide a faster paced introduction to a technology. They are for people who don't need all the detail at this point in their learning curve. The presentation has been streamlined to concentrate on the things you really need to know.
Table of Contents (8 chapters)

Catching errors with error boundary components

Error boundary components are just React components that implement the componentDidCatch life cycle method to catch errors in their children. They catch errors in constructor methods when a class component is initialized but fails, in life cycle methods, and while rendering. Errors that cannot be caught are from asynchronous code, event handlers, and errors in the error component boundary itself.

The componentDidCatch life cycle method receives two arguments: the first one is an error object while the second received argument is an object containing a componentStack property with a friendly stack trace that describes where in the React tree a component failed.

Getting ready

In...