【JS】页面字体布局

<!--页面字体布局-->
<script type="text/javascript">
  window.__setFontSize__ = (function (doc, win) {
    var docEl = doc.documentElement;
    var recalc = function () {
      var clientWidth = docEl.clientWidth;
      if (!clientWidth) return;
      if (clientWidth >= 750) {
        docEl.style.fontSize = 100 * (750 / 750) + 'px';
      } else {
        docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
      }
    };
    if (!doc.addEventListener) return;
    // doc.addEventListener('DOMContentLoaded', recalc, false);
    win.addEventListener('resize', recalc, false);
    return recalc;
  })(document, window);
  window.__setFontSize__();
</script>