title: HTML 5 Browser Compatibility Chart - HTML 5 in Old Browsers?
body: <p>I have just started considering using the HTML 5 api for a Rails/JQuery project, so I can use that great <a href="http://ejohn.org/blog/html-5-data-attributes/" rel="noreferrer"><code>data-</code> attribute</a> to store values.</p>
  
  <p>I am worried though about browser compatibility issues.  I have two questions (basic questions):</p>
  
  <ol>
  <li><p>In order to use HTML 5, do people need to upgrade their browsers?  How does that work?</p></li>
  <li><p>Is there an up-to-the-day chart of what features each browser layout engine supports, more up-to-date than this <a href="http://en.wikipedia.org/wiki/Comparison_of_layout_engines_(HTML5)" rel="noreferrer">Wikipedia article on comparing HTML layout engines</a> and this <a href="http://a.deveria.com/caniuse/" rel="noreferrer">When can I use... HTML 5</a> page?</p></li>
  </ol>
  
  <p>Is it going to be an issue with people using IE6 for example?  Lots of non-computer saavy people I've talked to who want to get an internet presence themselves use, and the people they talk to use, still, IE6!</p>
  
  <p>If it's not an issue, and you can use HTML 5 on old browsers, how do you?  Or what docs should I look at :)?  Thanks.</p>
  
  <p>Update: I will post some interesting links as I find them below.</p>
  
  <p><a href="http://www.findmebyip.com/#target-selector" rel="noreferrer">FindMeByIP</a>: "A simple app which reveals your browsers' support for CSS3 and HTML5 features in an easy to read format using Modernizr." - <a href="http://www.deepbluesky.com/blog/-/browser-support-for-css3-and-html5_72/" rel="noreferrer">Browser Support for CSS3 and HTML5</a></p>