Enter a del.icio.us tag/username into the field below and press 'Go'. A random page from that tag/user will come up in the frame at the bottom and a link to bookmark the shown page will be given. For more information read about it on my blog.
Simply, the specification for custom data attributes states that any attribute that starts with "data-" will be treated as a storage area for private data (private in the sense that the end user can't see it - it doesn't affect layout or presentation).
This allows you to write valid HTML markup (passing an HTML 5 validator) while, simultaneously, embedding data within your page
CodePress is web-based source code editor with syntax highlighting written in JavaScript that colors text in real time while it's being typed in the browser.