Basics of CSS3

SharePoint 2010 default master pages are configured to display in IE8 Standards document mode. As you can see from the list below, Internet Explorer 8 does not support CSS level 3 specifications. Below is a basic list of CSS levels and what web browser versions they support.

  • CSS3:
    • Internet Explorer 9+
    • Firefox 3+
    • Safari 3+
    • Google Chrome
  • CSS2:
    • Internet Explorer 8
    • Internet Explorer 7
      • CSS2 is not fully supported by IE7. There are some selectors that are not recognized. No max/min-width/height support. No CSS table display support.
    • Firefox 1 & 2
    • Safari 1 & 2
  • CSS1:
    • Internet Explorer 6

To change the display mode within your master pages to IE9, do a search within your custom master page for “X-UA-Compatible”. This is located ...

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