How do I get CSS mediaqueries to work with jQuery $(window).innerWidth()?

Question

I\'m trying to let jQuery take care of a menu, while CSS does something to the window background when resizing the browser.

So jQuery does something like this:

Answer 1

window.matchMedia is a way you can fire events when media selectors kick on or off. It's new so not widely supported, but seems pretty useful.

"Using media queries from code" from MDN