使用document.readyState和document.onreadystatechange搭配可以模拟出jquery ready和window.onload的效果。
效果就是下面这样的。
<script>//获取浏览器页面可见高度和宽度var _PageHeight = document.documentElement.clientHeight,_PageWidth = document.documentElement.clientWidth;//计算loading框距离顶部和左部的距离(loading框的宽度为215px,高度为61px)var _LoadingTop = _PageHeight > 61 ? (_PageHeight - 61) / 2 : 0,_LoadingLeft = _PageWidth > 600 ? (_PageWidth - 900) / 2 : 0;//在页面未加载完毕之前显示的loading Html自定义内容var _LoadingHtml = "<div id="loadingDiv" style="position:absolute;left:0;width:100%;height:" + _PageHeight + "px;top:0;background:#f3f8ff;opacity:0.8;filter:alpha(opacity=80);z-index:10000;"><div style="text-align:center;position: absolute; left: " + _LoadingLeft + "px; top:" + _LoadingTop + "px; width: 600px; height: 57px; line-height: 57px; padding-left: 50px; padding-right: 50px; border: 2px solid #95B8E7; color: #696969; font-family:\"Microsoft YaHei\";">加载中,请等待...</div></div>";//呈现loading效果document.write(_LoadingHtml);
//window.onload = function () {// var loadingMask = document.getElementById("loadingDiv");// loadingMask.parentNode.removeChild(loadingMask);//};
//监听加载状态改变document.onreadystatechange = completeLoading;
//加载状态为complete时移除loading效果function completeLoading() {console.log(document.readyState);if (document.readyState == "complete") {var loadingMask = document.getElementById("loadingDiv");loadingMask.parentNode.removeChild(loadingMask);}}
</script>