test

<div class="wrap" style="max-width:640px; margin:0 auto;">

(function(doc,win){var docEl=doc.documentElement,resizeEvt='orientationchange'in window?'orientationchange':'resize',recalc=function(){var clientWidth=docEl.clientWidth > 640 ? 640 : 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);

转载于:https://www.cnblogs.com/cn-chenhao/p/6219072.html