h5o - HTML5 outliner (bookmarklet, Chrome extension) The current (Nov, 2009) HTML5 draft defines quite a precise algorithm, for producing an outline for HTML documents. h5o is an implementation of the algorithm in JavaScript.
The goals of this project are: A bookmarklet, to produce outlines in decent browsers A Firebug extension, to help HTML5 development A repository of HTML5 outlining test cases Current status Chrome extension available Bookmarklet available (Tested in FF3.5 and O10.10 - should also work elsewhere) Limited version for IE also available. See: ProblemsWithInternetExplorer Firebug extension is in a very early experimental state Minified JS that you can use. HTML 5 Outliner. Modernizr: the feature detection library for HTML5/CSS3. HTML5 Readiness. The HTML5 test - How well does your browser support HTML5?
Can I use... Support tables for HTML5, CSS3, etc. What's my IP Address? What's my browser? HTML5 Rocks - A resource for open web HTML5 developers. HTML5 accessibility - September 2012. Mobile HTML5 - compatibility on iPhone, Android, Windows Phone, BlackBerry, Symbian and other mobile and tablet devices. The HTML5 test - How well does your browser support HTML5?