(function(win) {//计算自适应html元素的font-size大小的方法 var doc = win.document; var docEl = doc.documentElement; var tid; function refreshRem() { var width = docEl.getBoundingClientRect().width; if(width >= 750) width = 750; if(width <= 320) width = 320; var rem = width / 7.5; docEl.style.fontSize = rem + 'px'; } win.addEventListener('resize', function() { clearTimeout(tid); tid = setTimeout(refreshRem, 300); }, false); refreshRem(); })(window);