Deploy your own SWR project with Vercel.
Download the example:
curl https://codeload.github.com/vercel/swr/tar.gz/master | tar -xz --strip=2 swr-master/examples/storage-tab-sync
cd storage-tab-sync
Install it and run:
yarn
yarn dev
# or
npm install
npm run dev
Deploy it to the cloud with now (download)
now
Show how you could use SWR to synchronize localStorage values between tabs.