- 与750px的设计稿进行匹对，根据手机屏幕大小进行动态设置根元素
function remAdapt(){//自适应引入，元素单位用rem
(function () {
var b = document.documentElement,
a = function () {
var a = b.getBoundingClientRect().width;
b.style.fontSize = (100/750) * (a >= 750 ? 750 : a) + "px"
},
c = null;
window.addEventListener("resize", function () {
clearTimeout(c);
c = setTimeout(a, 300)
});
a();
})();
;// }// window.addEventListener("load", remAdapt);
