An example that uses ESM with Next.js and Lerna.
The idea behind this is to show a simple working example of how you can define multiple packages for a single project, and import ES6 modules from your packages (rather than be restricted to CommonJS import and export).
To run it:
lerna bootstrap
cd packages/nextjs-with-express/
npm run dev
Then access http://localhost:3000/
The demo just shows "Importing an ES6 module in Next.js via ESM worked!", but this is interesting because it's imported directly as an ES6 module from within node_modules (Lerna-symlinked). This is enabled by esm.
Draws from Next.js Custom Server with Express example.
Related thread: Next.js: Add support to transpile modules inside node_modules.