Book Image

Next.js Quick Start Guide

By : Kirill Konshin
Book Image

Next.js Quick Start Guide

By: Kirill Konshin

Overview of this book

Next.js is a powerful addition to the ever-growing and dynamic JavaScript world. Built on top of React, Webpack, and Babel, it is a minimalistic framework for server-rendered universal JavaScript applications. This book will show you the best practices for building sites using Next. js, enabling you to build SEO-friendly and superfast websites. This book will guide you from building a simple single page app to a scalable and reliable client-server infrastructure. You will explore code sharing between client and server, universal modules, and server-side rendering. The book will take you through the core Next.js concepts that everyone is talking about – hot reloading, code splitting, routing, server rendering, transpilation, CSS isolation, and more. You will learn ways of implementing them in order to create your own universal JavaScript application. You will walk through the building and deployment stages of your applications with the JSON API,customizing the confguration, error handling,data fetching, deploying to production, and authentication.
Table of Contents (9 chapters)

Error handling

Any application is prone to runtime errors. These could be various kinds of errors: caused by bugs, unexpected input, validation errors, poor network connectivity, or server errors. Lots of them. A well-designed app must not silently stop working or display an ugly error message with tons of irrelevant technical information. Instead, it must always display some meaningful error information, short and simple, and provide tips on how to solve the problem.

There are various approaches to error handling in React apps; let’s review them. As an example, we will look at a failed network request.

First, and simplest, is to store the error in the state of the component. Whenever we make a server request, we can surround it in a try-catch block and store the error in state or in initial props:

// pages/index.js
import React from "react";

const faultyPromise...