话不多说，请看代码：
(function() {
var changeRem = function() {
document.getElementsByTagName('html')[0].style.fontSize = document.documentElement.clientWidth / 20 + 'px';
};
changeRem();
var t;
window.addEventListener('resize',function() {
clearTimeout(t);
t = setTimeout(changeRem,300);
},false);
window.addEventListener('pageshow',function(e) {
if (e.persisted) {
clearTimeout(t);
t = setTimeout(changeRem,300);
}
},false);
}());
原文链接：https://www.f2er.com/js/40259.html