PUBLIC MARKS with tags media-queries & javascript

Harvey lets you add a second face to your application's JavaScript. It has no dependencies and comes in at about 3k minified or 1k gzipped. Neat!

Just to recap, I was looking for a way of detecting from JavaScript whether media queries have been executed in CSS without duplicating my breakpoints. That bit is important: I’m not looking for MatchMedia, which involves making media queries in JavaScript. Instead I’m looking for some otherwise-useless CSS property that I can use to pass information to JavaScript.