Demo/test of parallel text editing in different browser windows.
WebSockets are used to setup connection between clients and server.
WebWorker is used to not freeze main thread while computing and sending text diff.
SharedArrayBuffer is used to share memory(text) between threads. This demo is not a good example of using shared buffer, cause we still need to copy text to shared array. It is more suitable for sharing data netween more than 2 threads.

Run './scripts/setup-project-dependencies.sh' script.

MongoDB should be installed globally

Run './scripts/run-dev.sh'

Open http://localhost:3000/chat in browser

There is a tricky issue with this script - it builds(runs) different components in separate processes, proper termination was not setup, so MongoDB is not closed after script execution was stopped. In case you have an error connected to MongoDB - just rerun the script.

Run: './scripts/prepare.sh'

Open Project in VS Code(haven't tried other IDE) with following configuration:

// .vscode/launch.json
{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  "version": "0.2.0",
  "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Launch Program",
      "program": "${workspaceFolder}/packages/server/src/index.ts",
      "outFiles": [
        "${workspaceFolder}/packages/server/dist/**/*.js"
      ]
    }
  ]
}

// .vscode/settings.json
{
  "editor.codeActionsOnSave": {
    "source.fixAll": true
  }
}

1. Application was not intensively tested because of lack of time, however should work properly enough as for a test task.
2. Error handling does not cover all situations.
3. Haven't tested components' deploy and production build.
4. Application config should be extracted to a config file and/or encironment variables.
5. Project configuration should be adjusted:

• Live reload was broken after last project structure changes
• Workarounds in debugging process should be fixed.