/* **author:Beginner **create:20190620 **email:BeginnerMind@163.com */ var vRem;//全局变量添加vRem,记录当前状态下的rem值,方便js调用。 (function(win) { var designWidth=375,maxWidth=750,def_px=100, doc = win.document,docEl = doc.documentElement, resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize', recalc=function(){ console.log('rem init'); var width = docEl.getBoundingClientRect().width; width=width>maxWidth?maxWidth:width; vRem=Math.floor(width/designWidth*def_px); document.getElementsByTagName("html")[0].style.cssText = 'font-size: ' + vRem +"px"; } recalc(); if (!doc.addEventListener) return; win.addEventListener(resizeEvt, recalc, false); doc.addEventListener('DOMContentLoaded', recalc, false); })(window);