rem Set

rem

Setting mode

var fun = function (doc, win) {
    var docEl = doc.documentElement,
        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
        recalc = function () {
            var clientWidth = docEl.clientWidth;
            if (!clientWidth) return;
            //这里是假设在750px宽度设计稿的情况下，1rem = 100px；
            //可以根据实际需要修改
            docEl.style.fontSize =  (clientWidth /750)*100 + 'px';
        };
    if (!doc.addEventListener) return;
    win.addEventListener(resizeEvt, recalc, false);
    doc.addEventListener('DOMContentLoaded', recalc, false);
  }
  fun(document, window);

  export default fun;