The document provides an overview of several web application technologies including File API, Server-Sent Events, Web Notifications, Web Messaging, and Web Workers. It lists the current status of each specification and in some cases provides brief descriptions and code examples. The technologies covered allow applications to asynchronously push data to the browser, send messages between different browser pages or domains, store persistent local data, and run scripts in background threads.

1. WEB APPLICATION SG
2011.07.11
NHN

2. INDEX
File API
Server-Sent Events
Web Notifications
Web Messaging
Web Workers
Web Storage (WD)
Indexed Database (WD)
Web SQL Database (Retired)
Web Sockets API (WD)
Uniform Messaging Policy (WD) / Cross-Origin Resource Sharing (CORS) (WD)
Programmable HTTP Caching and Serving (Retired)
Web Performance : Navigation/Resource/User Timing (Candidate Recommendataion)

3. FILE API (WORKING DRAFT)
1) File API
2) Directories and System
3) Writer

4. SERVER-SENT EVENTS
(Last Call Review ended: 2011-04-21)
HTTP dedicated server-push
data push
var source = new EventSource('updates.cgi');
source.onmessage = function (event) {
alert(event.data);
};

5. WEB NOTIFICATIONS
(WORKING DRAFT)
. (ex. email, tweets,
etc)

6. WEB MESSAGING
(Last Call Review ended: 2011-06-01)
( )
Page A (www.test.com):
window.postMessage(
document.getElementById("message").value,
"http://www.example.com"
);
Page B (www.example.com) :
window.onmessage = function(e){
if( e.origin !== "http://www.test.com" ) {
return;
}
document.getElementById("test").innerHTML = e.origin + " said: " + e.data;
};

7. WEB WORKERS
(Last Call Review ended: 2011-04-21)
thread
thread single thread
.

8. .