Heim > Web-Frontend > js-Tutorial > JS implementiert die Nachahmung von Tencent Weibo, ohne die Code_Javascript-Kenntnisse des Weibo-Effekts zu aktualisieren und zu löschen

JS implementiert die Nachahmung von Tencent Weibo, ohne die Code_Javascript-Kenntnisse des Weibo-Effekts zu aktualisieren und zu löschen

WBOY
Freigeben: 2016-05-16 15:36:21
Original
1348 Leute haben es durchsucht

本文实例讲述了JS实现仿腾讯微博无刷新删除微博效果代码。分享给大家供大家参考。具体如下:

这里演示JS仿腾讯微博无刷新删除效果,将显示在微博列表里的内容删除,运用AJAX技术,无刷新删除微博的内容,参考性强,希望对初学AJAX的朋友有所帮助。

运行效果截图如下:

在线演示地址如下:

http://demo.jb51.net/js/2015/js-f-sina-web-ajax-del-info-demo/

具体代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>仿腾讯微博效果</title>
<style type="text/css">
body,div,h2,h3,ul,li,p{margin:0;padding:0;}
a{text-decoration:none;}
a:hover{text-decoration:underline;}
ul{list-style-type:none;}
body{color:#333;background:#3c3a3b;font:12px/1.5 \5b8b\4f53;}
#msgBox{width:500px;background:#fff;border-radius:5px;margin:10px auto;padding-top:10px;}
#msgBox form h2{font-weight:400;font:400 18px/1.5 \5fae\8f6f\96c5\9ed1;}
#msgBox form{background:url() repeat-x 0 bottom;padding:0 20px 15px;}
#userName,#conBox{color:#777;border:1px solid #d0d0d0;border-radius:6px;background:#fff url(img/inputBG.png) repeat-x;padding:3px 5px;font:14px/1.5 arial;}
#userName.active,#conBox.active{border:1px solid #7abb2c;}
#userName{height:20px;}
#conBox{width:448px;resize:none;height:65px;overflow:auto;}
#msgBox form div{position:relative;color:#999;margin-top:10px;}
#msgBox img{border-radius:3px;}
#face{position:absolute;top:0;left:172px;}
#face img{width:30px;height:30px;cursor:pointer;margin-right:6px;opacity:0.5;filter:alpha(opacity=50);}
#face img.hover,#face img.current{width:28px;height:28px;border:1px solid #f60;opacity:1;filter:alpha(opacity=100);}
#sendBtn{border:0;width:112px;height:30px;cursor:pointer;margin-left:10px;background:url(img/btn.png) no-repeat;}
#sendBtn.hover{background-position:0 -30px;}
#msgBox form .maxNum{font:26px/30px Georgia, Tahoma, Arial;padding:0 5px;}
#msgBox .list{padding:10px;}
#msgBox .list h3{position:relative;height:33px;font-size:14px;font-weight:400;background:#e3eaec;border:1px solid #dee4e7;}
#msgBox .list h3 span{position:absolute;left:6px;top:6px;background:#fff;line-height:28px;display:inline-block;padding:0 15px;}
#msgBox .list ul{overflow:hidden;zoom:1;}
#msgBox .list ul li{float:left;clear:both;width:100%;border-bottom:1px dashed #d8d8d8;padding:10px 0;background:#fff;overflow:hidden;}
#msgBox .list ul li.hover{background:#f5f5f5;}
#msgBox .list .userPic{float:left;width:50px;height:50px;display:inline;margin-left:10px;border:1px solid #ccc;border-radius:3px;}
#msgBox .list .content{float:left;width:400px;font-size:14px;margin-left:10px;font-family:arial;word-wrap:break-word;}
#msgBox .list .userName{display:inline;padding-right:5px;}
#msgBox .list .userName a{color:#2b4a78;}
#msgBox .list .msgInfo{display:inline;word-wrap:break-word;}
#msgBox .list .times{color:#889db6;font:12px/18px arial;margin-top:5px;overflow:hidden;zoom:1;}
#msgBox .list .times span{float:left;}
#msgBox .list .times a{float:right;color:#889db6;display:none;}
.tr{overflow:hidden;zoom:1;}
.tr p{float:right;line-height:30px;}
.tr *{float:left;}
</style>
<script type="text/javascript">
var get = {
  byId: function(id) {
    return typeof id === "string" &#63; document.getElementById(id) : id
  },
  byClass: function(sClass, oParent) {
    var aClass = [];
    var reClass = new RegExp("(^| )" + sClass + "( |$)");
    var aElem = this.byTagName("*", oParent);
    for (var i = 0; i < aElem.length; i++) reClass.test(aElem[i].className) && aClass.push(aElem[i]);
    return aClass
  },
  byTagName: function(elem, obj) {
    return (obj || document).getElementsByTagName(elem)
  }
};
/*-------------------------- +
 事件绑定, 删除
 +-------------------------- */
var EventUtil = {
  addHandler: function (oElement, sEvent, fnHandler) {
    oElement.addEventListener &#63; oElement.addEventListener(sEvent, fnHandler, false) : (oElement["_" + sEvent + fnHandler] = fnHandler, oElement[sEvent + fnHandler] = function () {oElement["_" + sEvent + fnHandler]()}, oElement.attachEvent("on" + sEvent, oElement[sEvent + fnHandler]))
  },
  removeHandler: function (oElement, sEvent, fnHandler) {
    oElement.removeEventListener &#63; oElement.removeEventListener(sEvent, fnHandler, false) : oElement.detachEvent("on" + sEvent, oElement[sEvent + fnHandler])
  },
  addLoadHandler: function (fnHandler) {
    this.addHandler(window, "load", fnHandler)
  }
};
/*-------------------------- +
 设置css样式
 读取css样式
 +-------------------------- */
function css(obj, attr, value)
{
  switch (arguments.length)
  {
    case 2:
      if(typeof arguments[1] == "object")
      {  
        for (var i in attr) i == "opacity" &#63; (obj.style["filter"] = "alpha(opacity=" + attr[i] + ")", obj.style[i] = attr[i] / 100) : obj.style[i] = attr[i];
      }
      else
      {  
        return obj.currentStyle &#63; obj.currentStyle[attr] : getComputedStyle(obj, null)[attr]
      }
      break;
    case 3:
      attr == "opacity" &#63; (obj.style["filter"] = "alpha(opacity=" + value + ")", obj.style[attr] = value / 100) : obj.style[attr] = value;
      break;
  }
};
EventUtil.addLoadHandler(function ()
{
  var oMsgBox = get.byId("msgBox");
  var oUserName = get.byId("userName");
  var oConBox = get.byId("conBox");
  var oSendBtn = get.byId("sendBtn");
  var oMaxNum = get.byClass("maxNum")[0];
  var oCountTxt = get.byClass("countTxt")[0];
  var oList = get.byClass("list")[0];
  var oUl = get.byTagName("ul", oList)[0];
  var aLi = get.byTagName("li", oList);
  var aFtxt = get.byClass("f-text", oMsgBox);
  var aImg = get.byTagName("img", get.byId("face"));
  var bSend = false;
  var timer = null;
  var oTmp = "";
  var i = 0;
  var maxNum = 140;
  //禁止表单提交
  EventUtil.addHandler(get.byTagName("form", oMsgBox)[0], "submit", function () {return false});
  //为广播按钮绑定发送事件
  EventUtil.addHandler(oSendBtn, "click", fnSend);
  //为Ctrl+Enter快捷键绑定发送事件
  EventUtil.addHandler(document, "keyup", function(event)
  {
    var event = event || window.event;
    event.ctrlKey && event.keyCode == 13 && fnSend()
  });
  //发送广播函数
  function fnSend ()
  {
    var reg = /^\s*$/g;
    if(reg.test(oUserName.value))
    {
      alert("\u8bf7\u586b\u5199\u60a8\u7684\u59d3\u540d");
      oUserName.focus()
    }
    else if(!/^[u4e00-\u9fa5\w]{2,8}$/g.test(oUserName.value))
    {
      alert("\u59d3\u540d\u75312-8\u4f4d\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u3001\u6c49\u5b57\u7ec4\u6210\uff01");
      oUserName.focus()
    }
    else if(reg.test(oConBox.value))
    {
      alert("\u968f\u4fbf\u8bf4\u70b9\u4ec0\u4e48\u5427\uff01");
      oConBox.focus()
    }
    else if(!bSend)
    {
      alert("\u4f60\u8f93\u5165\u7684\u5185\u5bb9\u5df2\u8d85\u51fa\u9650\u5236\uff0c\u8bf7\u68c0\u67e5\uff01");
      oConBox.focus()
    }
    else
    {
      var oLi = document.createElement("li");
      var oDate = new Date();
      oLi.innerHTML = "<div class=\"userPic\"><img src=\"" + get.byClass("current", get.byId("face"))[0].src + "\"></div>\
               <div class=\"content\">\
                 <div class=\"userName\"><a href=\"javascript:;\">" + oUserName.value + "</a>:</div>\
                <div class=\"msgInfo\">" + oConBox.value.replace(/<[^>]*>| /ig, "") + "</div>\
                <div class=\"times\"><span>" + format(oDate.getMonth() + 1) + "\u6708" + format(oDate.getDate()) + "\u65e5 " + format(oDate.getHours()) + ":" + format(oDate.getMinutes()) + "</span><a class=\"del\" href=\"javascript:;\">\u5220\u9664</a></div>\
               </div>";
      //插入元素
      aLi.length &#63; oUl.insertBefore(oLi, aLi[0]) : oUl.appendChild(oLi);
      //重置表单
      get.byTagName("form", oMsgBox)[0].reset();
      for (i = 0; i < aImg.length; i++) aImg[i].className = "";
      aImg[0].className = "current";
      //将元素高度保存
      var iHeight = oLi.clientHeight - parseFloat(css(oLi, "paddingTop")) - parseFloat(css(oLi, "paddingBottom"));
      var alpah = count = 0;
      css(oLi, {"opacity" : "0", "height" : "0"});  
      timer = setInterval(function ()
      {
        css(oLi, {"display" : "block", "opacity" : "0", "height" : (count += 8) + "px"});
        if (count > iHeight)
        {
          clearInterval(timer);
          css(oLi, "height", iHeight + "px");
          timer = setInterval(function ()
          {
            css(oLi, "opacity", (alpah += 10));
            alpah > 100 && (clearInterval(timer), css(oLi, "opacity", 100))
          },30)
        }
      },30);
      //调用鼠标划过/离开样式
      liHover();
      //调用删除函数
      delLi()
    }
  };
  //事件绑定, 判断字符输入
  EventUtil.addHandler(oConBox, "keyup", confine);  
  EventUtil.addHandler(oConBox, "focus", confine);
  EventUtil.addHandler(oConBox, "change", confine);
  //输入字符限制
  function confine ()
  {
    var iLen = 0;    
    for (i = 0; i < oConBox.value.length; i++) iLen += oConBox.value.charAt(i).charCodeAt() > 255 &#63; 1 : 0.5;
    oMaxNum.innerHTML = Math.abs(maxNum - Math.floor(iLen));  
    maxNum - Math.floor(iLen) >= 0 &#63; (css(oMaxNum, "color", ""), oCountTxt.innerHTML = "\u8fd8\u80fd\u8f93\u5165", bSend = true) : (css(oMaxNum, "color", "#f60"), oCountTxt.innerHTML = "\u5df2\u8d85\u51fa", bSend = false)
  }
  //加载即调用
  confine();    
  //广播按钮鼠标划过样式
  EventUtil.addHandler(oSendBtn, "mouseover", function () {this.className = "hover"});
  //广播按钮鼠标离开样式
  EventUtil.addHandler(oSendBtn, "mouseout", function () {this.className = ""});
  //li鼠标划过/离开处理函数
  function liHover()
  {
    for (i = 0; i < aLi.length; i++)
    {
      //li鼠标划过样式
      EventUtil.addHandler(aLi[i], "mouseover", function (event)
      {
        this.className = "hover";
        oTmp = get.byClass("times", this)[0];
        var aA = get.byTagName("a", oTmp);
        if (!aA.length)
        {
          var oA = document.createElement("a");          
          oA.innerHTML = "删除";
          oA.className = "del";
          oA.href = "javascript:;";
          oTmp.appendChild(oA)
        }
        else
        {
          aA[0].style.display = "block";
        }
      });
      //li鼠标离开样式
      EventUtil.addHandler(aLi[i], "mouseout", function ()
      {
        this.className = "";
        var oA = get.byTagName("a", get.byClass("times", this)[0])[0];
        oA.style.display = "none"  
      })
    }
  }
  liHover();
  //删除功能
  function delLi()
  {
    var aA = get.byClass("del", oUl);
    for (i = 0; i < aA.length; i++)
    {
      aA[i].onclick = function ()
      {
        var oParent = this.parentNode.parentNode.parentNode;
        var alpha = 100;
        var iHeight = oParent.offsetHeight;
        timer = setInterval(function ()
        {
          css(oParent, "opacity", (alpha -= 10));
          if (alpha < 0)
          {
            clearInterval(timer);            
            timer = setInterval(function ()
            {
              iHeight -= 10;
              iHeight < 0 && (iHeight = 0);
              css(oParent, "height", iHeight + "px");
              iHeight == 0 && (clearInterval(timer), oUl.removeChild(oParent))
            },30)
          }  
        },30);      
        this.onclick = null  
      }      
    }
  }
  delLi();
  //输入框获取焦点时样式
  for (i = 0; i < aFtxt.length; i++)
  {
    EventUtil.addHandler(aFtxt[i], "focus", function ()  {this.className = "active"});    
    EventUtil.addHandler(aFtxt[i], "blur", function () {this.className = ""})
  }
  //格式化时间, 如果为一位数时补0
  function format(str)
  {
    return str.toString().replace(/^(\d)$/,"0$1")
  }
  //头像
  for (i = 0; i < aImg.length; i++)
  {
    aImg[i].onmouseover = function ()
    {
      this.className += " hover"
    };
    aImg[i].onmouseout = function ()
    {
      this.className = this.className.replace(/\s&#63;hover/,"")
    };
    aImg[i].onclick = function ()
    {
      for (i = 0; i < aImg.length; i++) aImg[i].className = "";
      this.className = "current"  
    }
  }
});
</script>
</head>
<body>
<div id="msgBox">
 <form>
  <h2>来 , 说说你在做什么 , 想什么</h2>
  <div>
   <input id="userName" class="f-text" value="" />
   <p id="face"><img src="images/face1.gif" class="current" /><img src="images/face2.gif" /><img src="images/face1.gif" /><img src="images/face2.gif" /></p>
  </div>
  <div><input id="conBox" class="f-text"></div>
  <div class="tr">
   <p>
    <span class="countTxt">还能输入</span><strong class="maxNum">140</strong><span>个字</span>
    <input id="sendBtn" type="button" value="" title="快捷键 Ctrl+Enter" />
   </p>
  </div>
 </form>
 <div class="list">
  <h3><span>大家在说</span></h3>
  <ul>
   <li>
    <div class="userPic"><img src="images/face.gif" /></div>
    <div class="content">
     <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>
     <div class="msgInfo">新增Ctrl+Enter快捷键发送广播。</div>
     <div class="times"><span>07月05日 12:20</span><a class="del" href="javascript:;">删除</a></div>
    </div>
   </li>
   <li>
    <div class="userPic"><img src="images/face.gif" /></div>
    <div class="content">
     <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>
     <div class="msgInfo">新增选择头像功能。</div>
     <div class="times"><span>07月05日 12:08</span><a class="del" href="javascript:;">删除</a></div>
    </div>
   </li>
   <li>
    <div class="userPic"><img src="images/face.gif" /></div>
    <div class="content">
     <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>
     <div class="msgInfo">增加了记录广播时间的功能。</div>
     <div class="times"><span>07月04日 16:55</span><a class="del" href="javascript:;">删除</a></div>
    </div>
   </li>
  </ul>
 </div>
</div>
</body>
</html>
Nach dem Login kopieren

希望本文所述对大家的JavaScript程序设计有所帮助。

Verwandte Etiketten:
Quelle:php.cn
Erklärung dieser Website
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Beliebte Tutorials
Mehr>
Neueste Downloads
Mehr>
Web-Effekte
Quellcode der Website
Website-Materialien
Frontend-Vorlage