Diagnostic CSS stylesheet that helps visually detect any potentially invalid, inaccessible or erroneous HTML markup.
DiagnostiCSS highlights the following problems: * inline styles and event attributes * invalid links * empty or deprecated elements * elements missing required attributes
- (2013-11-06) Matthew Clark: I like the concept, but I rarely know why it's highlighting elements? All I see is the coloured borders, with no explanation of why they are the colour they are? is there a key somewhere that I've missed?