let resizeEvt = ‘orientationchange‘ in window ? ‘orientationchange‘ : ‘resize‘ let recalc = function () { document.documentElement.style.fontSize = document.documentElement.clientWidth / 7.5 + ‘px‘ } window.addEventListener(resizeEvt, recalc, false) document.addEventListener(‘DOMContentLoaded‘, recalc, false)
原文：https://www.cnblogs.com/luov/p/9330880.html