Quick Tip: Learning About HTML5 Local Storage

In today's video quick tip, we're going to build a working, though very basic, to-do list in just a minute or two. Thanks to HTML5's local storage, we can make advanced browsers "remember" what we type, even after the browser is closed or is refreshed.

"localStorage sets fields on the domain. Even when you close the browser, reopen it, and go back to the site, it remembers all fields in localStorage."
-QuirksBlog

While obviously not supported across all browsers, we can expect this method to work, most notably, in Internet Explorer 8, Safari 4, and Firefox 3.5. Note that, to compensate for older browsers that won't recognize local storage, you should first test to determine whether window.localStorage exists.

via http://www.findmebyip.com/litmus/