Download the example or clone the repo:

curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/shared-modules
cd shared-modules

Install it and run:

npm install
npm run dev

Deploy it to the cloud with now (download)

now

This example features:

• An app with two pages which has a common Counter component
• That Counter component maintain the counter inside its module. This is used primarily to illustrate that modules get initialized once and their state variables persist in runtime