What is the difference between `next export` and `next build` in Next.js?

Answering my own question with the help of the answer I received on the NextJS discussions forum link here Basics of next build, start and export next build builds the production application in the .next folder. You need to run this command irrespective of whether you want to run next start or next export. After … Read more

Error: getStaticPaths is required for dynamic SSG pages and is missing for “xxx”. NextJS

If you are creating a dynamic page eg: product/[slug].tsx then even if you don’t want to create any page on build time you need to create a getStaticPaths method to set the fallback property and let NextJS know what to do when the page you are trying to get doesn’t exist. export const getStaticPaths: GetStaticPaths<{ … Read more

Internal API fetch with getServerSideProps? (Next.js)

But then I read in the Next.js documentation that you should not use fetch() to all an API route in getServerSideProps(). You want to use the logic that’s in your API route directly in getServerSideProps, rather than calling your internal API. That’s because getServerSideProps runs on the server just like the API routes (making a … Read more

How to detect window size in Next.js SSR using react hook?

You can avoid calling your detection function in ssr by adding this code: // make sure your function is being called in client side only if (typeof window !== ‘undefined’) { // detect window screen width function } full example from your link: import { useState, useEffect } from ‘react’; // Usage function App() { … Read more

Module not found: Can’t resolve ‘fs’ in Next.js application

If you use fs, be sure it’s only within getInitialProps or getServerSideProps. (anything includes server-side rendering). You may also need to create a next.config.js file with the following content to get the client bundle to build: For webpack4 module.exports = { webpack: (config, { isServer }) => { // Fixes npm packages that depend on … Read more

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