網站圖片在retina螢幕

img標籤

<img class="hires" alt="" src="search.png" width="100" height="100" />

<script type="text/javascript">

$(function () {

if (window.devicePixelRatio == 2) {

          var images = $("img.hires");

          // loop through the images and make them hi-res

          for(var i = 0; i < images.length; i++) {

            // create new image name

            var imageType = images[i].src.substr(-4);

            var imageName = images[i].src.substr(0, images[i].src.length - 4);

            imageName += "@2x" + imageType;

            //rename image

            images[i].src = imageName;

          }

     }

});

</script>

css background

.repeatingPattern {

     background: url(../images/bgPattern.png) repeat;

     background-size: 100px 100px;

}

@media only screen and (-webkit-min-device-pixel-ratio: 2) {

     .repeatingPattern {

          background: url(../images/bgPattern@2x.png) repeat;

     }

}

參考網址www.kylejlarson.com