> Invalid per the CSS spec is pretty self explanatory. It is, but in the same way “I received an error” is not an incorrect error report it just lacks specific

> Invalid per the CSS spec is pretty self explanatory. It is, but in the same way “I received an error” is not an incorrect error report it just lacks specificity. I think what CSSer was asking (though the question itself was not worded as precisely as it could be) is: can you give examples of the invalid identifiers that it encourages?