Selenium IDE: This is like a beginner’s friend. It’s a browser extension, often for Firefox, that lets you record your ...

CSSwhat.parse(selector) - Parses selector. The function returns a two-dimensional array. The first array represents selectors separated by commas (eg. sub1, sub2), the second contains the relevant ...

This parser could be extended to support the entire CSS grammar. I don't have such a use case. However, should you want to add new grammar, raise an issue.