<!--目录-->
<script type="text/javascript"> var BlogDirectory = { /* 获取元素位置，距浏览器左边界的距离（left）和距浏览器上边界的距离（top） */ getElementPosition:function (ele) { var topPosition = 0; var leftPosition = 0; while (ele){ topPosition += ele.offsetTop; leftPosition += ele.offsetLeft; ele = ele.offsetParent; } return {top:topPosition, left:leftPosition}; }, /* 获取滚动条当前位置 */ getScrollBarPosition:function () { var scrollBarPosition = document.body.scrollTop || document.documentElement.scrollTop; return scrollBarPosition; }, /* 移动滚动条，finalPos 为目的位置，internal 为移动速度 */ moveScrollBar:function(finalpos, interval) { //若不支持此方法，则退出 if(!window.scrollTo) { return false; } //窗体滚动时，禁用鼠标滚轮 window.onmousewheel = function(){ return false; }; //清除计时 if (document.body.movement) { clearTimeout(document.body.movement); } var currentpos =BlogDirectory.getScrollBarPosition();//获取滚动条当前位置 var dist = 0; if (currentpos == finalpos) {//到达预约位置，则解禁鼠标滚轮，并退出 window.onmousewheel = function(){ return true; } return true; } if (currentpos < finalpos) {//未到达，则计算下一步所要移动的距离 dist = Math.ceil((finalpos - currentpos)/10); currentpos += dist; } if (currentpos > finalpos) { dist = Math.ceil((currentpos - finalpos)/10); currentpos -= dist; } var scrTop = BlogDirectory.getScrollBarPosition();//获取滚动条当前位置 window.scrollTo(0, currentpos);//移动窗口 if(BlogDirectory.getScrollBarPosition() == scrTop)//若已到底部，则解禁鼠标滚轮，并退出 { window.onmousewheel = function(){ return true; } return true; } //进行下一步移动 var repeat = "BlogDirectory.moveScrollBar(" + finalpos + "," + interval + ")"; document.body.movement = setTimeout(repeat, interval); }, htmlDecode:function (text){ var temp = document.createElement("div"); temp.innerHTML = text; var output = temp.innerText || temp.textContent; temp = null; return output; }, /* 建立博客目录， id表示包含博文正文的 div 容器的 id， mt 和 st 分别表示主标题和次级标题的标签名称（如 H二、H3，大写或小写均可以！）， interval 表示移动的速度 */ createBlogDirectory:function (id, mt, st, interval){ //获取博文正文div容器 var elem = document.getElementById(id); if(!elem) return false; //获取div中全部元素结点 var nodes = elem.getElementsByTagName("*"); //建立博客目录的div容器 var divSideBar = document.createElement('DIV'); divSideBar.className = 'uprightsideBar'; divSideBar.setAttribute('id', 'uprightsideBar'); var divSideBarTab = document.createElement('DIV'); divSideBarTab.setAttribute('id', 'sideBarTab'); divSideBar.appendChild(divSideBarTab); var h2 = document.createElement('H2'); divSideBarTab.appendChild(h2); var txt = document.createTextNode('目录导航 '); h2.appendChild(txt); var divSideBarContents = document.createElement('DIV'); divSideBarContents.style.display = 'none'; divSideBarContents.setAttribute('id', 'sideBarContents'); divSideBar.appendChild(divSideBarContents); //建立自定义列表 var dlist = document.createElement("dl"); divSideBarContents.appendChild(dlist); var num = 0;//统计找到的mt和st mt = mt.toUpperCase();//转化成大写 st = st.toUpperCase();//转化成大写 //遍历全部元素结点 for(var i=0; i<nodes.length; i++) { if(nodes[i].nodeName == mt|| nodes[i].nodeName == st) { //获取标题文本 var nodetext = nodes[i].innerHTML.replace(/<\/?[^>]+>/g,"");//innerHTML里面的内容可能有HTML标签，因此用正则表达式去除HTML的标签 nodetext = nodetext.replace(/ /ig, "");//替换掉全部的 nodetext = BlogDirectory.htmlDecode(nodetext); //插入锚 nodes[i].setAttribute("id", "blogTitle" + num); var item; switch(nodes[i].nodeName) { case mt: //若为主标题 item = document.createElement("dt"); break; case st: //若为子标题 item = document.createElement("dd"); break; } //建立锚连接 var itemtext = document.createTextNode(nodetext); item.appendChild(itemtext); item.setAttribute("name", num); item.onclick = function(){ //添加鼠标点击触发函数 var pos = BlogDirectory.getElementPosition(document.getElementById("blogTitle" + this.getAttribute("name"))); if(!BlogDirectory.moveScrollBar(pos.top, interval)) return false; }; //将自定义表项加入自定义列表中 dlist.appendChild(item); num++; } } if(num == 0) return false; /*鼠标进入时的事件处理*/ divSideBarTab.onmouseenter = function(){ divSideBarContents.style.display = 'block'; } /*鼠标离开时的事件处理*/ divSideBar.onmouseleave = function() { divSideBarContents.style.display = 'none'; } document.body.appendChild(divSideBar); } }; BlogDirectory.createBlogDirectory("cnblogs_post_body","h2","h3",20); console.log('页面加载完毕生成目录') </script>
二.css代码
/*生成博客目录的CSS*/
/*自定制一个css3动画*/
@keyframes pulse { 25% { transform: scale(1.05); } 75% { transform: scale(.95); } } /*调整目录框的位置*/ #uprightsideBar { font-size: 10px; font-family: Arial, Helvetica, sans-serif; text-align: left; position: fixed; top: 50px; right: 0px; width: auto; height: auto; } #sideBar { float: left; padding: 0 0 0 65px; } #sideBarTab { float: left; width: 40px; height: 200px; border: 1px solid #e5e5e5; border-right: none; text-align: center; background-image: url(https://www.cnblogs.com/images/cnblogs_com/pythonywy/1455951/o_%e7%82%ab%e5%bd%a9.png); color: #79a3e5; } /*展开后内部内容格式*/ #sideBarContents { float: left; overflow: auto; overflow-x: hidden; min-width: 0px; max-width: 500px; min-height: 200px; max-height: 1200px; border: 1px solid #e5e5e5; border-right: none; background: #fff; background-size: 100% 100%; color: #79a3e5; } #sideBarContents dl { margin: 0; padding: 0; } #sideBarContents dt { margin-top: 5px; margin-left: 5px; } /*CSS3hover动画*/ #sideBarContents dd:hover, dt:hover { animation-name: pulse; animation-duration: 1s; animation-timing-function: linear; animation-iteration-count: infinite; box-shadow: none; color: #A7995A; } #sideBarContents dd { margin-left: 20px; }
三.展现效果javascript
未打开状态css
展开效果html
hover效果java