Question

is it possible to write rss reader with HTML5?

Answer 1

Yes, and even before HTML5! RSS feeds are just XML documents that can be parsed with javascript and displayed with HTML.

http://www.rss-to-javascript.com/

Answer 2

Yes indeed, rss is just a feed standard written in XML, media type language.

Answer 3

Yes. with advances in the HTML 5 standard (ajax integration in the standard) and advances in CSS3, formatting the RSS XML is a breeze. You will need to understand the AJAX requests that drive the data, javascript, and CSS. But it is possible. I would google HTML 5 RSS reader for some code examples. Most modern browsers detect rss feeds and have pre-formated stylesheets for them.

Answer 4

The big thing that the latest AJAX standards provide is a standard for cross-domain communication. Before, you could not create a feed reader because feeds existed on other domains, so AJAX calls could not be made to fetch the feed. Now, if the feed's server knows how to understand cross-domain requests and the browser supports them, you can make cross-domain calls. Otherwise, you still have to go through your own server to get the RSS contents.