The app that was built in the mitter.io tutorial: https://docs.mitter.io/getting-started/build-your-first-web-app

To run this application, you need to get the following from the mitter.io panel

1. An application id.
2. Create three users @john, @amy and @candice.
3. Create two channels, either as per the getting started documentation or as you wish.
4. Modify index.js to include these credentials.

Then run the application:

git clone git@github.com:mitterio/mitter-getting-started-web-demo.git
cd mitter-getting-started-web-demo

yarn install
yarn start

Open your browser to http://localhost:3000/user/@username to login as @username. Do note that the default page that opens up on yarn start will throw an error because it specfically looks for a username-including pattern.