HTML5/CSS3 Status


HTML5 is a working draft of a recommendation that, when finalized, will be submitted to international standards organizations.

There is broad agreement among the major players: Google, Apple, Microsoft and Adobe.

Browsers with HTML5 support

Chrome, Safari, Opera, Firefox4 (beta), IE9 (beta) = ~20% of PC browsers

Browsers with no HTML5 support

IE8, Firefox 3.x, IE6, IE7 = ~80% of PC browsers

Extending Support

  • Declaring new elements in CSS:
    section, article, aside, nav, header, footer, hgroup { display: block; }
  • HTML5 shims:
    <!--[if IE]>
    <script src=""></script>
  • CSS3 proprietary property statements
    -o-property, -moz-property, -webkit-property
    Search: css3 browser support chart