If you're looking for 'living' CSS with variables supplied by JS at the time the styles (or responsive queries) apply, there's a polyfill for IE8+ that includes

If you're looking for 'living' CSS with variables supplied by JS at the time the styles (or responsive queries) apply, there's a polyfill for IE8+ that includes this functionality that you can use everywhere today! http://codepen.io/tomhodgins/pen/MKWOWW http://codepen.io/tomhodgins/pen/MKWOWW