Implementing Authentication in Next.js Using NextAuth.js
A practical guide to implementing authentication in Next.js with NextAuth.js, including sessions, callbacks, route protection, and router‑specific trade‑offs.
Articles
Next.js, page 3 of 3
Next.js is an open‑source React framework created by Vercel. It is used to build fast, scalable websites and web applications, combining React with routing, data fetching, API routes, automatic code splitting, TypeScript support, server‑side rendering (SSR), and static site generation (SSG).
Below you will find a subset of articles from my blog specifically about Next.js as well as Next.js platform consulting. This is an area I have worked with for many years, and it has been a regular subject in my writing. There are fifty‑two articles collected together for you below.
Implementing Authentication in Next.js Using NextAuth.js. 
All About Headless CMSes. All About Headless CMSes
Websites have not been set‑and‑forget for a long time now, and without the technical know‑how to update a static site, CMSes are a key part of web development.
ReferenceError: Window is Not Defined in Gatsby. ReferenceError: Window is Not Defined in Gatsby
Fix window is not defined in Gatsby or Next.js by understanding SSR, guarding browser globals, lifecycle timing, dynamic imports, and third‑party modules.
Incremental Static Regeneration and CMS Publishing Freshness. Incremental Static Regeneration and CMS Publishing Freshness
How Incremental Static Regeneration affects CMS publishing freshness, including rebuild timing, stale pages, previews, and editorial expectations.
Preview Mode in Next.js with a Headless CMS. Preview Mode in Next.js with a Headless CMS
Preview Mode in Next.js explained with a headless CMS, draft content workflows, preview cookies, and how editors can see unpublished pages safely.
Removing p Tags from Contentful List Items. Removing
pTags from Contentful List ItemsOne of the quirks of rendering Rich Text from Contentful is that list items come wrapped in paragraph <p> tags. Fortunately, this is a simple one to resolve.
Image Optimisation with next/image. Image Optimisation with
next/image`next/image` explained with responsive sizing, lazy loading, layout shift reduction, and why image optimisation matters in real Next.js applications.
Dynamic Imports and Code Splitting in Next.js. Dynamic Imports and Code Splitting in Next.js
Dynamic imports and code splitting in Next.js explained with `next/dynamic`, lazy‑loaded components, SSR trade‑offs, and when splitting really helps.
Understanding getStaticPaths in Next.js. Understanding
getStaticPathsin Next.js`GetStaticPaths` in Next.js explained with dynamic routes, pre‑rendered paths, fallback behaviour, and how static generation works for slug‑based pages.
Using getStaticProps with CMS Data. Using
getStaticPropswith CMS DataUse getStaticProps with CMS data without hiding freshness, build‑time, preview and validation risks in Pages Router content workflows.
GetStaticProps vs. getServerSideProps in Next.js. getStaticPropsvs.getServerSidePropsin Next.js`GetStaticProps` vs. `getServerSideProps` in Next.js explained with build‑time and request‑time data fetching, trade‑offs, and practical page examples.
Static Generation vs. Server‑Side Rendering in Next.js. Static Generation vs. Server‑Side Rendering in Next.js
Compare static generation and server‑side rendering in Next.js through freshness, request‑time data, performance, SEO, operational cost, and page intent.
Dynamic Routes in Next.js. Dynamic Routes in Next.js
Dynamic routes in Next.js explained with `[slug]` pages, route params, nested segments, and why file‑based dynamic routing simplifies content‑driven sites.
Custom _app and Custom _document in Next.js. Custom
_appand Custom_documentin Next.jsCustom `_app` and `_document` in Next.js explained clearly, including shared layout, global setup, server‑rendered HTML, and what each file is actually for.
Using next/link for Client‑Side Navigation. Using
next/linkfor Client‑Side Navigation
Understanding File‑System Routing in Next.js. Understanding File‑System Routing in Next.js
File‑system routing in Next.js explained clearly, including the `pages` directory, nested routes, index files, and why routing feels simpler than custom setups.
