HTML5 and SharePoint 2010 (and the IE9 Beta) 4

With the release of the IE9 Beta yesterday (http://ie.microsoft.com/testdrive/) I’ve already started getting questions about whether HTML5 / CSS3 can be used with SharePoint. There is technically nothing that would stand in the way of using either with SharePoint (note, the page won’t validate as proper HTML5 code… but that should be obvious). That being said, I thought it would be interesting to take some SharePoint 2010 master pages and change the DOCTYPE to HTML5 and see how they look in the IE9 Beta. So I changed out the typical DOCTYPE with:    <!DOCTYPE HTML> Also note, by default, most SharePoint 2010 master pages have the following meta tag in them: <meta http-equiv="X-UA-Compatible" content="IE=8" /> This locks the page to displaying in IE8 rendering even in IE9, so I had to change this to IE=9 as well. With the DOCTYPE set and the meta tag changed, the master pages renders as an HTML5 page. Here ...