- No Flash inside (no need to open port 843 - which often doesn't
work through proxies, no need to host
- All the transports support cross domain connections. It's possible and recommended to host SockJS on different domain than your main web site.
- Polling transports are be used as a fallback for old browsers and hosts behind restrictive proxies.
|WebSocket hixie-76||Chrome 6-12, Safari 5, Firefox 4 (disabled), Opera 11 (disabled)|
|WebSocket hybi-10||Chrome 14+, Firefox 6+|
|IFrame via postMessage + EventSource||Opera 10.70+, Firefox 3.5+|
|XDR streaming (CORS)||IE 8, Firefox 3.5+, Safari 4+, Chrome 3+|
|XDR polling (CORS)||IE 8, Firefox 3.5+, Safari 4+, Chrome 3+ (through misbehaving proxy)|
|IFrame via postMessage + XHR polling||Opera 9+|