Runtime tools : Client engine : Universal Application Guideline and Samples : Tech references
  
Tech references
1 HTML5 Web API
Provides APIs and UI elements to access the native GPS, Camera and Microphone sensors
2 PWA (Progressive Web Applications)
▪ Built on common web technologies
▪ Uses Service Worker for pre-fetch and off-line operation
▪ Described with a manifest file
▪ Publishing the App to Apple App Store or Google Play is optional
▪ Find more details
https://web.dev/progressive-web-apps/
3 Cordova
An application development framework targeting hybrid web applications for mobile devices
▪ Web UI run in WebView
▪ Access native functions with plugin API
▪ Alternatives: React Native (Facebook, better performance but native/different UI across iOS and Android), Flutter (Google, different language - Dart)
▪ Find more details
https://cordova.apache.org/
4 Electron
An application development framework targeting desktop GUI applications for multi-OS
▪ Web UI run in Chrome
▪ System integration based on Node.js extension
▪ Well known Apps:
Microsoft VS Code, Slack, Evernote desktop, Github desktop
▪ Find more details
https://www.electronjs.org/