// excluding regex trick: http://www.rexegg.com/regex-best-trick.html // Not anything inside double quotes // Not anything inside single quotes // Not anything inside url() // Any digit followed by px // !singlequotes|!doublequotes|!url()|pixelunit module.exports = /"[^"]+"|'[^']+'|url\([^)]+\)|var\([^)]+\)|(\d*\.?\d+)px/g;