rem实现自适应

js自动更改<html>的font-size

<script type="text/javascript">
    //rem设置
    (function(doc, win) {
        var docEl = doc.documentElement,
            resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
            recalc = function() {
                var clientWidth = docEl.clientWidth;
                if (!clientWidth) return;
                docEl.style.fontSize = 20 * (clientWidth / 320) + 'px';
                //宽与高度
                document.body.style.height = clientWidth * (900 / 1440) + "px"
            };
        win.addEventListener(resizeEvt, recalc, false);
        doc.addEventListener('DOMContentLoaded', recalc, false);
    })(document, window);
    </script>

 

posted @ 2016-09-20 17:01  继续与幸福签约  阅读(141)  评论(0)    收藏  举报