New HTML5 and CSS3 introduced lot of new features,although it is not completely supported by most of the browsers.Is it a good idea to design a website using HTML5 and css3?and for browsers which not support HTML5 display low bandwidth version of it?or there exists any library's(js) to fix HTML5 and CSS3 comparability for browsers like IE 6 or Firefox 3?
Is it a good idea to design website with HTML 5 and css3?
website design;html5;css3
It is a good idea to use these new technologies, because it's where we're headed. So many other sites already have content that requires a modern browser. Take Youtube for example. Even Gmail. But the list goes on. Most people have a modern browser already, and it would be to YOUR full advantage to design a site with HTML5 and CSS3. While support for some features is not uniform yet across browsers, the general idea is there. There's no reason for you to waste your effort making an old-browser-friendly site since they are a dying breed: large companies with technology contracts or plans where upgrades haven't kicked in, or old family computers that physically can't handle the new operating systems and browsers. See this chart: http://gs.statcounter.com/#browser_version_partially_combined-ww-monthly-201107-201207Of course you may want to put up banners like this: http://www.updateyourbrowser.net/en/ (scroll to bottom, click view example) to inform your outdated clients that they can't get the full experience from your site without first upgrading. That some features may be unavailable. You can also try to adapt certain coping methods based on user-agent, so that old browsers automatically get a non-CSS3 stylesheet, and so forth.