// apply `backgroundcover` to an element that has a background image: $('.background-image').backgroundcover();  // or to an element without background image by setting the image source // explicitly: $('.my-div').backgroundcover('path/to/image.jpg');  // You can also specify a position value which will override values found by // the actuall backgound positioning `(left|center|right, top|center|bottom)`. // Positioning will always fall back to `center center` if no value is found at all  // Use this item to add a background image and set positioning $('.my-div').backgroundcover('path/to/image.jpg', {x: 'left', y: 'top'});  // Use an existing background image but manipulate its position  $('.background-image').backgroundcover({x: 'center', y: 'bottom'});  // you may also pass options:  // setting `poll` to true will start polling the element for size change // instead of resizing the image on a window resize event. `poll` is set to // `false`by default. $('.my-div').backgroundcover('path/to/image.jpg', {poll: false});  // you can also add your custom destroy events, e.g. for angular you'd add // '$destroy' $('.my-div').backgroundcover('path/to/image.jpg', {destroy: 'destroyevent'});

Modernizr.testStyles(   '#modernizr',   function (elem, rule) {     var style = Modernizr.prefixed('backgroundSize');     elem.style[style] = 'cover';     Modernizr.addTest('backgroundsizecover', (elem.style[style] === 'cover'))   } );