Express js is a javascript backend framework (same as Django, Lavarel, Flask) while Next Js is a frontend react framework (like Angular, Vue.js, etc). They can be used complementary. Next.JS is particularly suited for search engine optimisation. You can build your backend in express.js and your frontend in next.js. You can do your data management and connect to the database using express js and then express js serves the next js frontend with data.
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How is Express Js to build a backend?
Express JS is used as a backend. Here is an example of a simple express js. The official express js documentation can be found here (https://expressjs.com/en/starter/hello-world.html). Alternatives are Koa, Nest (https://blog.back4app.com/expressjs-alternatives/).
const express = require('express') const app = express() const port = 3000
app.get('/', (req, res) => { res.send('Hello World!') })
app.listen(port, () => { console.log(Example app listening on port ${port}) })What is Next.JS?
To learn more about Next.JS and how it is best used for SEO.
What is Next Js used for?
Next.js is a React frontend framework. Their fantastic documentation can be found here: https://nextjs.org/docs (or start their course here: https://nextjs.org/learn/basics/create-nextjs-app). Next.js is particularly suited to developing SEO-optimised websites. It comes with multiple rendering options (SSG, SSR, iSR, CSR (https://medium.com/@idrazhar/ssr-ssg-isr-csr-in-next-js-the-ultimate-guide-9d1b90aa995e)), automatic code splitting, assets optimisation, and much more.
We have a number of articles on Next.JS and Next.JS SEO best practices
