移动app rem

(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 = 100 * (clientWidth / 375) + 'px';

};

if (!doc.addEventListener) return;
win.addEventListener(resizeEvt, recalc, false);
doc.addEventListener('DOMContentLoaded', recalc, false);

})(document, window);

(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 = 100 * (clientWidth / 750) + 'px';

};

if (!doc.addEventListener) return;
win.addEventListener(resizeEvt, recalc, false);
doc.addEventListener('DOMContentLoaded', recalc, false);

})(document, window);

dp?

http://www.cnblogs.com/xiamer/p/5732473.html

https://zhuanlan.zhihu.com/p/23363538