Work in Progress

Good day and thank you for checking out my crypto orderbook :)

Live link (Firefox only): https://react-crypto-orderbook-using-websocket-webworker-an-cpatti97100.vercel.app/

Get Firefox: https://www.mozilla.org/en-US/firefox/new/

Screenshot

Here are few important notes:

This code is not for production use and only runs on Firefox due to SharedWorker and WebWorker specific features browser support.

I honestly just had so much fun playing with those that I could not resist going all in :)

For a real world application I would rely on a different setup, although less optimal probably.

Features

• It shares one WebSocket connection with multiple component instances and/or tabs. No matter how many, there will always be only one connection.
• It uses at most 2 WebWorkers, one for every currently displayed product.
• Component updates are throttled no matter the message frequency from the WebSocket
• Fully responsive

Performance

Memory usage in time

Absolutely stable

Firefox Profiler

Very lightweight on the CPU

React Profiler

dev build rendering times

Improvements

• Tests
• SharedWorker is currently not supported in safari, but it is again under consideration (https://bugs.webkit.org/show_bug.cgi?id=149850)
• SharedWorker cannot spin up WebWorker in Chrome
• I used HTML tables and SVG as they are accessible and in theory the right tool for the job.
• Naming of CSS classes and variables in general
• ...many more, software is a never ending journey :D

Next ideas

• I am very familiar with RxJS, and it would have probably be a nice fit here

React + TypeScript + Vite

This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.

Currently, two official plugins are available:

• @vitejs/plugin-react uses Babel for Fast Refresh
• @vitejs/plugin-react-swc uses SWC for Fast Refresh

Expanding the ESLint configuration

If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:

export default tseslint.config({
  extends: [
    // Remove ...tseslint.configs.recommended and replace with this
    ...tseslint.configs.recommendedTypeChecked,
    // Alternatively, use this for stricter rules
    ...tseslint.configs.strictTypeChecked,
    // Optionally, add this for stylistic rules
    ...tseslint.configs.stylisticTypeChecked,
  ],
  languageOptions: {
    // other options...
    parserOptions: {
      project: ['./tsconfig.node.json', './tsconfig.app.json'],
      tsconfigRootDir: import.meta.dirname,
    },
  },
})

You can also install eslint-plugin-react-x and eslint-plugin-react-dom for React-specific lint rules:

// eslint.config.js
import reactX from 'eslint-plugin-react-x'
import reactDom from 'eslint-plugin-react-dom'

export default tseslint.config({
  plugins: {
    // Add the react-x and react-dom plugins
    'react-x': reactX,
    'react-dom': reactDom,
  },
  rules: {
    // other rules...
    // Enable its recommended typescript rules
    ...reactX.configs['recommended-typescript'].rules,
    ...reactDom.configs.recommended.rules,
  },
})