//= require modernizr // Sticky positioning - constrains an element to be positioned inside the // intersection of its container box, and the viewport. Modernizr.addTest('csspositionsticky', function () {

var prop = 'position:';
var value = 'sticky';
var el = document.createElement('modernizr');
var mStyle = el.style;

mStyle.cssText = prop + Modernizr._prefixes.join(value + ';' + prop).slice(0, -prop.length);

return mStyle.position.indexOf(value) !== -1;

});