It works for http requests, but not for websockets (the article also mentions that). If you want decent bidirectional communication (no polling, i.e., the kind

It works for http requests, but not for websockets (the article also mentions that). If you want decent bidirectional communication (no polling, i.e., the kind you'd want to get reads from an NFC reader) that's not a good option. Also, I'm willing to bet browsers will block that at some point too...