postMessage cross-document communication
Channel Message cross-channel communication
http://lzw.me/a/html5-postmessage-post-cross-domain.html
https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API/Using_channel_messaging
postMessage cross-document communication
Channel Message cross-channel communication
http://lzw.me/a/html5-postmessage-post-cross-domain.html
https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API/Using_channel_messaging