WebSockets
Widely available since 2018-01-29
The WebSocket API opens a two-way communication channel between the user's browser and a server.
Learning resources on MDN
Browser support (view on caniuse.com)
- Chrome 5 Released on 2010-05-25
- Chrome Android 18 Released on 2012-06-27
- Edge 12 Released on 2015-07-29
- Firefox 11 Released on 2012-03-13
- Firefox for Android 14 Released on 2012-06-26
- Safari 5 Released on 2010-06-07
- Safari on iOS 4.2 Released on 2010-11-22
Specifications
- WebSockets Standard, from HTML Workstream (WHATWG).