玩遍jquery

時間 2019-12-08

標籤玩遍 jquery 欄目 JQuery 简体版

原文原文鏈接

一 jquery簡介javascript

1 jquery是什麼 css

jQuery由美國人John Resig建立，至今已吸引了來自世界各地的衆多 javascript高手加入其team。
jQuery是繼prototype以後又一個優秀的Javascript框架。其宗旨是——WRITE LESS,DO MORE,寫更少的代碼,作更多的事情。
它是輕量級的js庫(壓縮後只有21k) ，這是其它的js庫所不及的，它兼容CSS3，還兼容各類瀏覽器（IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+）。
jQuery是一個快速的，簡潔的javaScript庫，使用戶能更方便地處理HTML documents、events、實現動畫效果，而且方便地爲網站提供AJAX交互。
jQuery還有一個比較大的優點是，它的文檔說明很全，並且各類應用也說得很詳細，同時還有許多成熟的插件可供選擇。
jQuery可以使用戶的html頁保持代碼和html內容分離，也就是說，不用再在html裏面插入一堆js來調用命令了，只需定義id便可。

2 什麼是jQuery對象？html

jQuery 對象就是經過jQuery包裝DOM對象後產生的對象。
jQuery 對象是 jQuery 獨有的. 若是一個對象是 jQuery 對象, 那麼它就可使用 jQuery 裏的方法: $(「#test」).html();

好比： java

$("#test").html() 意思是指：獲取ID爲test的元素內的html代碼。其中html()是jQuery裏的方法 jquery

這段代碼等同於用DOM實現代碼： document.getElementById(" test ").innerHTML; web

雖然jQuery對象是包裝DOM對象後產生的，可是jQuery沒法使用DOM對象的任何方法，同理DOM對象也不能使用jQuery裏的方法.亂使用會報錯瀏覽器

約定：若是獲取的是 jQuery 對象, 那麼要在變量前面加上$. app

var $variable = jQuery 對象框架

var variable = DOM 對象ide

基本語法：$(selector).action()

二尋找元素(重要的選擇器和篩選器)

2.1 選擇器

2.1.1 基本選擇器 $("*") $("#id") $(".class") $("element") $(".class,p,div")

2.1.2層級選擇器 $(".outer div") $(".outer>div") $(".outer+div") $(".outer~div")

2.1.3 基本篩選器 $("li:first") $("li:eq(2)") $("li:even") $("li:gt(1)")

2.1.4 屬性選擇器 $('[id="div1"]') $('["alex="sb"][id]')

2.1.5 表單選擇器 $("[type='text']")----->$(":text") 注意只適用於input標籤

$("input:checked")

2.2 篩選器

2.2.1 過濾篩選器

$("li").eq(2) $("li").first() $("ul li").hasclass("test")

2.2.2 查找篩選器

$("div").children(".test") $("div").find(".test")

$(".test").next() $(".test").nextAll() $(".test").nextUntil()

$("div").prev() $("div").prevAll() $("div").prevUntil()

$(".test").parent() $(".test").parents() $(".test").parentUntil()

$("div").siblings()

實例左側菜單

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>left_menu</title>

    <script src="js/jquery-2.2.3.js"></script>
    <script>
          function show(self){
//              console.log($(self).text())
              $(self).next().removeClass("hide")
              $(self).parent().siblings().children(".con").addClass("hide")

          }
    </script>
    <style>
          .menu{
              height: 500px;
              width: 30%;
              background-color: gainsboro;
              float: left;
          }
          .content{
              height: 500px;
              width: 70%;
              background-color: rebeccapurple;
              float: left;
          }
         .title{
             line-height: 50px;
             background-color: #425a66;
             color: forestgreen;}


         .hide{
             display: none;
         }


    </style>
</head>
<body>

<div class="outer">
    <div class="menu">
        <div class="item">
            <div class="title" onclick="show(this);">菜單一</div>
            <div class="con">
                <div>111</div>
                <div>111</div>
                <div>111</div>
            </div>
        </div>
        <div class="item">
            <div class="title" onclick="show(this);">菜單二</div>
            <div class="con hide">
                <div>111</div>
                <div>111</div>
                <div>111</div>
            </div>
        </div>
        <div class="item">
            <div class="title" onclick="show(this);">菜單三</div>
            <div class="con hide">
                <div>111</div>
                <div>111</div>
                <div>111</div>
            </div>
        </div>

    </div>
    <div class="content"></div>

</div>

</body>
</html>

View Code

實例 tab切換

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>tab</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>
           function tab(self){
               var index=$(self).attr("xxx")
               $("#"+index).removeClass("hide").siblings().addClass("hide")
               $(self).addClass("current").siblings().removeClass("current")

           }
    </script>
    <style>
        *{
            margin: 0px;
            padding: 0px;
        }
        .tab_outer{
            margin: 0px auto;
            width: 60%;
        }
        .menu{
            background-color: #cccccc;
            /*border: 1px solid red;*/
            line-height: 40px;
        }
        .menu li{
            display: inline-block;
        }
        .menu a{
            border-right: 1px solid red;
            padding: 11px;
        }
        .content{
            background-color: tan;
            border: 1px solid green;
            height: 300px;
        }
        .hide{
            display: none;
        }

        .current{
            background-color: darkgray;
            color: yellow;
            border-top: solid 2px rebeccapurple;
        }
    </style>
</head>
<body>
      <div class="tab_outer">
          <ul class="menu">
              <li xxx="c1" class="current" onclick="tab(this);">菜單一</li>
              <li xxx="c2" onclick="tab(this);">菜單二</li>
              <li xxx="c3" onclick="tab(this);">菜單三</li>
          </ul>
          <div class="content">
              <div id="c1">內容一</div>
              <div id="c2" class="hide">內容二</div>
              <div id="c3" class="hide">內容三</div>
          </div>

      </div>
</body>
</html>

View Code

三操做元素(屬性 CSS 和文檔處理)

3.1 屬性操做

$("p").text() $("p").html() $(":checkbox").val()

$(".test").attr("alex") $(".test").attr("alex","sb")

$(".test").attr("checked","checked") $(":checkbox").removeAttr("checked")

$(".test").prop("checked",true)

$(".test").addClass("hide")

實例編輯框正反選

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>

             function selectall(){

                 $("table :checkbox").prop("checked",true)
             }
             function che(){

                 $("table :checkbox").prop("checked",false)
             }

             function reverse(){


//                 var idlist=$("table :checkbox")
//                 for(var i=0;i<idlist.length;i++){
//                     var element=idlist[i];
//
//                     var ischecked=$(element).prop("checked")
//                     if (ischecked){
//                         $(element).prop("checked",false)
//                     }
//                     else {
//                         $(element).prop("checked",true)
//                     }
//
//                 }



                 $("table :checkbox").each(function(){
                     if ($(this).prop("checked")){
                         $(this).prop("checked",false)
                     }
                     else {
                         $(this).prop("checked",true)
                     }

                 });



//                 li=[10,20,30,40]
////                 dic={name:"yuan",sex:"male"}
//                 $.each(li,function(i,x){
//                     console.log(i,x)
//                 })

             }

    </script>
</head>
<body>

     <button onclick="selectall();">全選</button>
     <button onclick="che();">取消</button>
     <button onclick="reverse();">反選</button>

     <table border="1">
         <tr>
             <td><input type="checkbox"></td>
             <td>111</td>
         </tr>
         <tr>
             <td><input type="checkbox"></td>
             <td>222</td>
         </tr>
         <tr>
             <td><input type="checkbox"></td>
             <td>333</td>
         </tr>
         <tr>
             <td><input type="checkbox"></td>
             <td>444</td>
         </tr>
     </table>



</body>
</html>

View Code

實例模態對話框

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>批量編輯</title>
        <!--<link rel="stylesheet" href="css/mycss.css" />-->
        <style>
            *{
    margin: 0;
    padding: 0;
}
body {
  font-family: 'Open Sans', sans-serif;
  font-weight: 300;
  line-height: 1.42em;
  color:rebeccapurple;
  background-color:goldenrod;
}

h1 {
  font-size:3em;
  font-weight: 300;
  line-height:1em;
  text-align: center;
  color: #4DC3FA;
}
.blue {
    color: #185875;
}
.yellow {
    color: #FFF842;
    }

/*!*彈出層罩子*!*/
#full {
    background-color:gray;
    left:0;
    opacity:0.7;
    position:absolute;
    top:0;
    filter:alpha(opacity=30);
}

.modified {
    background-color: #1F2739;
    border:3px solid whitesmoke;
    height:400px;
    left:50%;
    margin:-200px 0 0 -200px;
    padding:1px;
    position:fixed;
    /*position:absolute;*/
    top:50%;
    width:400px;
    display:none;
}
li {
    list-style: none;
    margin: 20px 0 0 50px;
    color: #FB667A;
}
input[type="text"] {
  padding: 10px;
  border: solid 1px #dcdcdc;
  /*transition: box-shadow 3s, border 3s;*/

}

.iputbutton {
    margin: 60px 0 0 50px;
    color: whitesmoke;
    background-color: #FB667A;
    height: 30px;
    width: 100px;
    border: 1px dashed;

}




.container th h1 {
    font-weight: bold;
    font-size: 1em;
      text-align: left;
      color: #185875;
}

.container td {
    font-weight: normal;
    font-size: 1em;
}

.container {

    width: 80%;
    margin: 0 auto;

}

.container td, .container th {
    padding-bottom: 2%;
    padding-top: 2%;
      padding-left:2%;
}

/*單數行*/
.container tr:first-child {
    background-color: red;
}

/*偶數行*/
.container tr:not(first-child){
      background-color: cyan;
}

.container th {
    background-color: #1F2739;
}

.container td:last-child {
    color: #FB667A;
}
/*鼠標進過行*/
.container tr:hover {
   background-color: #464A52;
}
/*鼠標進過列*/
.container td:hover {
  background-color: #FB667A;
  color: #403E10;
  font-weight: bold;
  transform: translate3d(5px, -5px, 0);
}





        </style>
        <script src="jquery-2.2.3.js"></script>
        <script>
            //點擊【編輯】顯示

$(function () {


    $("table[name=host] tr:gt(0) td:last-child").click(function (event) {

        alert("234");
//        $("#full").css({height:"100%",width:"100%"});

        $(".modified").data('current-edit-obj', $(this));

        $(".modified,#full").show();

        var hostname = $(this).siblings("td[name=hostname]").text();
        $(".modified #hostname").val(hostname);
        var ip = $(this).siblings("td[name=ip]").text();
        $(".modified #ip").val(ip);
        var port = $(this).siblings("td[name=port]").text();
        $(".modified #port").val(port);
    });
    //取消編輯
    $(".modified #cancel").bind("click", function () {
        $(".modified,#full").hide();
    });

//    肯定修改
    $(".modified #ok").bind("click", function (event) {
        var check_status = true;
        var ths = $(".modified").data('current-edit-obj');
        var hostname = $(".modified #hostname").val().trim();
        var ip = $(".modified #ip").val().trim();
        var port = $(".modified #port").val().trim();
        var port = parseInt(port);
        console.log(port);
        //        端口爲空設置爲22
        if (isNaN(port)) {
            alert("您沒有設置正常的SSH端口號，將採用默認22號端口");
            var port = 22;
        }else if ( port > 65535) {
        //            若是端口不是一個數字 或者端口大於65535
            var check_status = false;
            $(".modified #port").css("border-color","red");
            alert("端口號超過範圍!")
        };
        // 主機和ip不能是空
        if ( hostname == ""){
            var check_status = false;
            $(".modified #hostname").css("border-color","red");
        }else if (ip == "") {
            var check_status = false;
            $(".modified #ip").css("border-color","red");
        };
        if (check_status == false){
            return false;
        }else{
            //$(this).css("height","60px")   爲何不用$(this),而用$()
            $(ths).siblings("td[name=hostname]").text(hostname);
            $(ths).siblings("td[name=ip]").text(ip);
            $(ths).siblings("td[name=port]").text(port);
            $(".modified,#full").hide();
        };

    });

});
            
        </script>
    </head>
    <body>
        <h1>
            <span class="blue">&lt;</span>Homework1<span class="blue">&gt;</span> <span class="yellow">HostList</span>
        </h1>
        <div id="full">
            <div class="modified">
                <li>主機名：<input id="hostname" type="text" value="" />*</li>
                <li>ip地址：<input id="ip" type="text" value="" />*</li>
                <li>端口號：<input id="port" type="text" value="" />[0-65535]</li>
                    <div id="useraction">
                     <input class="iputbutton" type="button" name="肯定" id="ok" value="肯定"/>
                    <input class="iputbutton" type="button" name="取消" id="cancel" value="取消"/>
                    </div>
            </div>
        </div>
        <table class="container" name="host">
            <tr>
                <th><h1>主機名</h1></th>
                <th><h1>IP地址</h1></th>
                <th><h1>端口</h1></th>
                <th><h1>操做</h1></th>

            </tr>
            <tr>
                <td name="hostname">web01</td>
                <td name="ip">192.168.2.1</td>
                <td name="port">22</td>
                <td>編輯 </td>
            </tr>
            <tr>
                <td name="hostname">web02</td>
                <td name="ip">192.168.2.2</td>
                <td name="port">223</td>
                <td>編輯 </td>
            </tr>
            <tr>
                <td name="hostname">web03</td>
                <td name="ip">192.168.2.3</td>
                <td name="port">232</td>
                <td>編輯 </td>
            </tr>
            <tr>
                <td name="hostname">web04</td>
                <td name="ip">192.168.2.4</td>
                <td name="port">232</td>
                <td>編輯 </td>
            </tr>
        </table>


    </body>
</html>

View Code

3.2 CSS操做

3.2.1(樣式) css("{color:'red',backgroud:'blue'}")

3.2.2(位置) offset() position() scrollTop() scrollLeft()

3.2.3(尺寸) height() width()

實例返回頂部

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>


          window.onscroll=function(){

              var current=$(window).scrollTop();
              console.log(current)
              if (current>100){

                  $(".returnTop").removeClass("hide")
              }
              else {
              $(".returnTop").addClass("hide")
          }
          }


           function returnTop(){
//               $(".div1").scrollTop(0);

               $(window).scrollTop(0)
           }




    </script>
    <style>
        body{
            margin: 0px;
        }
        .returnTop{
            height: 60px;
            width: 100px;
            background-color: darkgray;
            position: fixed;
            right: 0;
            bottom: 0;
            color: greenyellow;
            line-height: 60px;
            text-align: center;
        }
        .div1{
            background-color: orchid;
            font-size: 5px;
            overflow: auto;
            width: 500px;
        }
        .div2{
            background-color: darkcyan;
        }
        .div3{
            background-color: aqua;
        }
        .div{
            height: 300px;
        }
        .hide{
            display: none;
        }
    </style>
</head>
<body>
     <div class="div1 div">
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>
         <p>hello</p>

     </div>
     <div class="div2 div"></div>
     <div class="div3 div"></div>
     <div class="returnTop hide" onclick="returnTop();">返回頂部</div>
</body>
</html>

View Code

實例滾動菜單

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>

        body{
            margin: 0px;
        }
        img {
            border: 0;
        }
        ul{
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .clearfix:after {
            content: ".";
            display: block;
            height: 0;
            clear: both;
            visibility: hidden;
        }

        .wrap{
            width: 980px;
            margin: 0 auto;
        }

        .pg-header{
            background-color: #303a40;
            -webkit-box-shadow: 0 2px 5px rgba(0,0,0,.2);
            -moz-box-shadow: 0 2px 5px rgba(0,0,0,.2);
            box-shadow: 0 2px 5px rgba(0,0,0,.2);
        }
        .pg-header .logo{
            float: left;
            padding:5px 10px 5px 0px;
        }
        .pg-header .logo img{
            vertical-align: middle;
            width: 110px;
            height: 40px;

        }
        .pg-header .nav{
            line-height: 50px;
        }
        .pg-header .nav ul li{
            float: left;
        }
        .pg-header .nav ul li a{
            display: block;
            color: #ccc;
            padding: 0 20px;
            text-decoration: none;
            font-size: 14px;
        }
        .pg-header .nav ul li a:hover{
            color: #fff;
            background-color: #425a66;
        }
        .pg-body{

        }
        .pg-body .catalog{
            position: absolute;
            top:60px;
            width: 200px;
            background-color: #fafafa;
            bottom: 0px;
        }
        .pg-body .catalog.fixed{
            position: fixed;
            top:10px;
        }

        .pg-body .catalog .catalog-item.active{
            color: #fff;
            background-color: #425a66;
        }

        .pg-body .content{
            position: absolute;
            top:60px;
            width: 700px;
            margin-left: 210px;
            background-color: #fafafa;
            overflow: auto;
        }
        .pg-body .content .section{
            height: 500px;
        }
    </style>
</head>
<body>

    <div class="pg-header">
        <div class="wrap clearfix">
            <div class="logo">
                <a href="#">
                    <img src="images/3.jpg">
                </a>
            </div>
            <div class="nav">
                <ul>
                    <li>
                        <a  href="#">首頁</a>
                    </li>
                    <li>
                        <a  href="#">功能一</a>
                    </li>
                    <li>
                        <a  href="#">功能二</a>
                    </li>
                </ul>
            </div>

        </div>
    </div>
    <div class="pg-body">
        <div class="wrap">
            <div class="catalog">
                <div class="catalog-item" auto-to="function1"><a>第1張</a></div>
                <div class="catalog-item" auto-to="function2"><a>第2張</a></div>
                <div class="catalog-item" auto-to="function3"><a>第3張</a></div>
            </div>
            <div class="content">

                <div menu="function1" class="section">
                    <h1>第一章</h1>
                </div>
                <div menu="function2" class="section">
                    <h1>第二章</h1>
                </div>
                <div menu="function3" class="section">
                    <h1>第三章</h1>
                </div>
            </div>
        </div>
    </div>

    <script type="text/javascript" src="js/jquery-2.2.3.js"></script>
    <script type="text/javascript">


     window.onscroll=function(){
         var ws=$(window).scrollTop()
         if (ws>50){
             $(".catalog").addClass("fixed")
         }
         else {
             $(".catalog").removeClass("fixed")
         }
         $(".content").children("").each(function(){

          var offtop=$(this).offset().top;
//             console.log(offtop)
             var total=$(this).height()+offtop;

             if (ws>offtop && ws<total){

                 if($(window).height()+$(window).scrollTop()==$(document).height()){
                     var index=$(".catalog").children(" :last").css("fontSize","40px").siblings().css("fontSize","12px")
                     console.log(index)
                 target='div[auto-to="'+index+'"]';
                 $(".catalog").children(target).css("fontSize","40px").siblings().css("fontSize","12px")

                 }
                 else{
                      var index=$(this).attr("menu");
                 target='div[auto-to="'+index+'"]';
                 $(".catalog").children(target).css("fontSize","40px").siblings().css("fontSize","12px")
                 }


             }

         })

     }

    </script>


</body>
</html>

View Code

3.3 文檔處理

內部插入 $("#c1").append("<b>hello</b>") $("p").appendTo("div")

prepend() prependTo()

外部插入 before() insertBefore() after insertAfter()

replaceWith() remove() empty() clone()

實例 clone方法的應用

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<body>
            <div class="outer">
                <div class="condition">

                        <div class="icons" style="display:inline-block">
                            <a onclick="add(this);"><button>+</button></a>
                        </div>

                        <div class="input" style="display:inline-block">
                            <input type="checkbox">
                            <input type="text" value="alex">
                        </div>
                </div>
            </div>

<script src="js/jquery-2.2.3.js"></script>
    <script>

            function add(self){
                var $duplicate = $(self).parent().parent().clone();
                $duplicate.find('a[onclick="add(this);"]').attr('onclick',"removed(this)").children("").text("-");
                $duplicate.appendTo($(self).parent().parent().parent());

            }
           function removed(self){

               $(self).parent().parent().remove()

           }

    </script>
</body>
</html>

View Code

3.4 事件

3.4.1

$(document).ready(function(){}) -----------> $(function(){})

3.4.2

$("p").click(function(){})

$("p").bind("click",function(){})

$("ul").delegate("li","click",function(){})

實例拖動面板

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <div style="border: 1px solid #ddd;width: 600px;position: absolute;">
        <div id="title" style="background-color: black;height: 40px;color: white;">
            標題
        </div>
        <div style="height: 300px;">
            內容
        </div>
    </div>
<script type="text/javascript" src="jquery-2.2.3.js"></script>
<script>
    $(function(){
        // 頁面加載完成以後自動執行
        $('#title').mouseover(function(){
            $(this).css('cursor','move');
        }).mousedown(function(e){
            //console.log($(this).offset());
            var _event = e || window.event;
            // 原始鼠標橫縱座標位置
            var ord_x = _event.clientX;
            var ord_y = _event.clientY;

            var parent_left = $(this).parent().offset().left;
            var parent_top = $(this).parent().offset().top;

            $(this).bind('mousemove', function(e){
                var _new_event = e || window.event;
                var new_x = _new_event.clientX;
                var new_y = _new_event.clientY;

                var x = parent_left + (new_x - ord_x);
                var y = parent_top + (new_y - ord_y);

                $(this).parent().css('left',x+'px');
                $(this).parent().css('top',y+'px');

            })
        }).mouseup(function(){
            $(this).unbind('mousemove');
        });
    })
</script>
</body>
</html>

View Code

放大鏡

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>bigger</title>
    <style>
        *{
            margin: 0;
            padding:0;
        }
        .outer{
            height: 350px;
            width: 350px;
            border: dashed 5px cornflowerblue;
        }
        .outer .small_box{
            position: relative;
        }
        .outer .small_box .float{
            height: 175px;
            width: 175px;
            background-color: darkgray;
            opacity: 0.4;
            fill-opacity: 0.4;
            position: absolute;
            display: none;

        }

        .outer .big_box{
            height: 400px;
            width: 400px;
            overflow: hidden;
            position:absolute;
            left: 360px;
            top: 0px;
            z-index: 1;
            border: 5px solid rebeccapurple;
            display: none;


        }
        .outer .big_box img{
            position: absolute;
            z-index: 5;
        }


    </style>
</head>
<body>


        <div class="outer">
            <div class="small_box">
                <div class="float"></div>
                <img src="small.jpg">

            </div>
            <div class="big_box">
                <img src="big.jpg">
            </div>

        </div>


<script src="js/jquery-2.2.3.js"></script>
<script>

    $(function(){

          $(".small_box").mouseover(function(){

              $(".float").css("display","block");
              $(".big_box").css("display","block")

          })
          $(".small_box").mouseout(function(){

              $(".float").css("display","none");
              $(".big_box").css("display","none")

          })



          $(".small_box").mousemove(function(e){

              var _event=e || window.event;

              var float_width=$(".float").width();
              var float_height=$(".float").height();

              console.log(float_height,float_width);

              var float_height_half=float_height/2;
              var float_width_half=float_width/2;
              console.log(float_height_half,float_width_half);


               var small_box_width=$(".small_box").height();
               var small_box_height=$(".small_box").width();



//  鼠標點距離左邊界的長度與float應該與左邊界的距離差半個float的width,height同理
              var mouse_left=_event.clientX-float_width_half;
              var mouse_top=_event.clientY-float_height_half;

              if(mouse_left<0){
                  mouse_left=0
              }else if (mouse_left>small_box_width-float_width){
                  mouse_left=small_box_width-float_width
              }


              if(mouse_top<0){
                  mouse_top=0
              }else if (mouse_top>small_box_height-float_height){
                  mouse_top=small_box_height-float_height
              }

               $(".float").css("left",mouse_left+"px");
               $(".float").css("top",mouse_top+"px")

               var percentX=($(".big_box img").width()-$(".big_box").width())/ (small_box_width-float_width);
               var percentY=($(".big_box img").height()-$(".big_box").height())/(small_box_height-float_height);

              console.log(percentX,percentY)

               $(".big_box img").css("left", -percentX*mouse_left+"px")
               $(".big_box img").css("top", -percentY*mouse_top+"px")


          })


    })


</script>
</body>
</html>

View Code

3.5 動畫效果

實例隱藏與顯示

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>
    /**
 * Created by yuan on 16/5/5.
 */

$(document).ready(function(){
    $("#hide").click(function(){
        $("p").hide(1000);
    });
    $("#show").click(function(){
        $("p").show(1000);
    });

//用於切換被選元素的 hide() 與 show() 方法。
    $("#toggle").click(function(){
        $("p").toggle();
    })

 for (var i= 0;i<7;i++){
//            顛倒了常規的$(A).append(B)的操做，即不是把B追加到A中，而是把A追加到B中。
            $("<div>").appendTo(document.body);
        }
        $("div").click(function(){
          $(this).hide(2000);
        });
});

    </script>
    <link type="text/css" rel="stylesheet" href="style.css">
</head>
<body>
    <!--1 隱藏與顯示-->
    <!--2 淡入淡出-->
    <!--3 滑動-->
    <!--4 效果-回調:每個動畫執行完畢以後所能執行的函數方法或者所能作的一件事-->


    <p>hello</p>
    <button id="hide">隱藏</button>
    <button id="show">顯示</button>
    <button id="toggle">隱藏/顯示</button>

</body>
</html>

View Code

實例淡入淡出

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>
    $(document).ready(function(){
   $("#in").click(function(){
       $("#id1").fadeIn(1000);
       $("#id2").fadeIn(1000);
       $("#id3").fadeIn(1000);

   });
    $("#out").click(function(){
       $("#id1").fadeOut(1000);
       $("#id2").fadeOut(1000);
       $("#id3").fadeOut(1000);

   });
    $("#toggle").click(function(){
       $("#id1").fadeToggle(1000);
       $("#id2").fadeToggle(1000);
       $("#id3").fadeToggle(1000);

   });
    $("#fadeto").click(function(){
       $("#id1").fadeTo(1000,0.4);
       $("#id2").fadeTo(1000,0.5);
       $("#id3").fadeTo(1000,0);

   });
});

    
    
    </script>

</head>
<body>
      <button id="in">fadein</button>
      <button id="out">fadeout</button>
      <button id="toggle">fadetoggle</button>
      <button id="fadeto">fadeto</button>

      <div id="id1" style="display:none; width: 80px;height: 80px;background-color: blueviolet"></div>
      <div id="id2" style="display:none; width: 80px;height: 80px;background-color: orangered "></div>
      <div id="id3" style="display:none; width: 80px;height: 80px;background-color: darkgreen "></div>

</body>
</html>

View Code

實例滑動

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>
    $(document).ready(function(){
     $("#flipshow").click(function(){
         $("#content").slideDown(1000);
     });
      $("#fliphide").click(function(){
         $("#content").slideUp(1000);
     });
      $("#toggle").click(function(){
         $("#content").slideToggle(1000);
     })
  });
    </script>
    <style>
        #flipshow,#content,#fliphide,#toggle{
            padding: 5px;
            text-align: center;
            background-color: blueviolet;
            border:solid 1px red;

        }
        #content{
            padding: 50px;
            display: none;
        }
    </style>
</head>
<body>

    <div id="flipshow">出現</div>
    <div id="fliphide">隱藏</div>
    <div id="toggle">toggle</div>

    <div id="content">helloworld</div>

</body>
</html>

View Code

實例回調函數

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.2.3.js"></script>
    <script>

    $(document).ready(function(){
   $("button").click(function(){
       $("p").hide(1000,function(){
           alert('動畫結束')
       })

//       $("p").css('color','red').slideUp(1000).slideDown(2000)
   })
});
    </script>
</head>
<body>
  <button>隱藏</button>
  <p>helloworld helloworld helloworld</p>

</body>
</html>

View Code

3.6 擴展(插件機制)

jquery.extend({})
jquery.fn.extend({})

實例商城菜單

<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta name="viewport" content="width=device-width">
    <meta http-equiv="X-UA-Compatible" content="IE=8">
    <title>購物商城</title>
    <style>

*{
    margin: 0;
    padding: 0;
}
.hide{
    display:none;
}


.header-nav {
    height: 39px;
    background: #c9033b;
}
.header-nav .bg{
    background: #c9033b;
}

.header-nav .nav-allgoods .menuEvent {
    display: block;
    height: 39px;
    line-height: 39px;
    text-decoration: none;
    color: #fff;
    text-align: center;
    font-weight: bold;
    font-family: 微軟雅黑;
    color: #fff;
    width: 100px;
}
.header-nav .nav-allgoods .menuEvent .catName {
    height: 39px;
    line-height: 39px;
    font-size: 15px;
}

.header-nav .nav-allmenu a {
    display: inline-block;
    height: 39px;
    vertical-align: top;
    padding: 0 15px;
    text-decoration: none;
    color: #fff;
    float: left;
}

.header-menu a{
    color:#656565;
}

.header-menu .menu-catagory{
    position: absolute;
    background-color: #fff;
    border-left:1px solid #fff;
    height: 316px;
    width: 230px;
     z-index: 4;
     float: left;
}
.header-menu .menu-catagory .catagory {
    border-left:4px solid #fff;
    height: 104px;
    border-bottom: solid 1px #eaeaea;
}
.header-menu .menu-catagory .catagory:hover {
    height: 102px;
    border-left:4px solid #c9033b;
    border-bottom: solid 1px #bcbcbc;
    border-top: solid 1px #bcbcbc;
}

.header-menu .menu-content .item{
    margin-left:230px;
    position:absolute;
    background-color:white;
    height:314px;
    width:500px;
    z-index:4;
    float:left;
    border: solid 1px #bcbcbc;
    border-left:0;
    box-shadow: 1px 1px 5px #999;
}

    </style>
</head>
<body>

<div class="pg-header">

    <div class="header-nav">
        <div class="container narrow bg">
            <div class="nav-allgoods left">
                <a id="all_menu_catagory" href="#" class="menuEvent">
                    <strong class="catName">所有商品分類</strong>
                    <span class="arrow" style="display: inline-block;vertical-align: top;"></span>
                </a>
            </div>
        </div>
    </div>
    <div class="header-menu">
        <div class="container narrow hide">
            <div id="nav_all_menu" class="menu-catagory">
                <div class="catagory" float-content="one">
                    <div class="title">家電</div>
                    <div class="body">
                        <a href="#">空調</a>
                    </div>
                </div>
                <div class="catagory" float-content="two">
                    <div class="title">牀上用品</div>
                    <div class="body">
                        <a href="http://www.baidu.com">牀單</a>
                    </div>
                </div>
                <div class="catagory" float-content="three">
                    <div class="title">水果</div>
                    <div class="body">
                        <a href="#">橘子</a>
                    </div>
                </div>
            </div>

            <div id="nav_all_content" class="menu-content">
                <div class="item hide" float-id="one">

                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="勺子">勺子</a> </span>
                        </dd>
                    </dl>
                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="菜刀">菜刀</a> </span>

                        </dd>
                    </dl>
                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#">菜板</a> </span>
                        </dd>
                    </dl>
                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="碗">碗</a> </span>

                        </dd>
                    </dl>

                </div>
                <div class="item hide" float-id="two">
                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="">角閥</a> </span>

                        </dd>
                    </dl>
                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="角閥">角閥</a> </span>

                        </dd>
                    </dl>
                    <dl>
                        <dt><a href="#" class="red">廚房用品</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="角閥">角閥</a> </span>

                        </dd>
                    </dl>

                </div>
                <div class="item hide" float-id="three">
                    <dl>
                        <dt><a href="#" class="red">廚房用品3</a></dt>
                        <dd>
                            <span>| <a href="#" target="_blank" title="角閥">角閥3</a> </span>

                        </dd>
                    </dl>
                    <dl>
                        <dt><a href="#" class="red">廚房用品3</a></dt>
                        <dd>
                            <span>| <a href="http://www.meilele.com/category-jiaofa/" target="_blank" title="角閥">角閥3</a> </span>

                        </dd>
                    </dl>
                </div>
            </div>
        </div>
    </div>

</div>


<script src="js/jquery-2.2.3.js"></script>

<script type="text/javascript">
    $(document).ready(function () {

        Change_Menu('#all_menu_catagory','#nav_all_menu', '#nav_all_content');

    });



    function Change_Menu(all_menu_catagory,menu, content) {
        $all_menu_catagory = $(all_menu_catagory);
        $menu = $(menu);
        $content = $(content);

        $all_menu_catagory.bind("mouseover", function () {
            $menu.parent().removeClass('hide');
        });
        $all_menu_catagory.bind("mouseout", function () {
            $menu.parent().addClass('hide');
        });

        $menu.children().bind("mouseover", function () {
            $menu.parent().removeClass('hide');
            $item_content = $content.find('div[float-id="' + $(this).attr("float-content") + '"]');
            $item_content.removeClass('hide').siblings().addClass('hide');
        });
        $menu.bind("mouseout", function () {
            $content.children().addClass('hide');
            $menu.parent().addClass('hide');
        });
        $content.children().bind("mouseover", function () {

            $menu.parent().removeClass('hide');
            $(this).removeClass('hide');
        });
        $content.children().bind("mouseout", function () {

            $(this).addClass('hide');
            $menu.parent().addClass('hide');
        });
    }
</script>


</body>
</html>

View Code

實例編輯框

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        .edit-mode{
            background-color: #b3b3b3;
            padding: 8px;
            text-decoration: none;
            color: white;
        }
        .editing{
            background-color: #f0ad4e;
        }
    </style>
</head>
<body>

    <div style="padding: 20px">
        <input type="button" onclick="CheckAll('#edit_mode', '#tb1');" value="全選" />
        <input type="button" onclick="CheckReverse('#edit_mode', '#tb1');" value="反選" />
        <input type="button" onclick="CheckCancel('#edit_mode', '#tb1');" value="取消" />

        <a id="edit_mode" class="edit-mode" href="javascript:void(0);"  onclick="EditMode(this, '#tb1');">進入編輯模式</a>

    </div>
    <table border="1">
        <thead>
        <tr>
            <th>選擇</th>
            <th>主機名</th>
            <th>端口</th>
            <th>狀態</th>
        </tr>
        </thead>
        <tbody id="tb1">
            <tr>
                <td><input type="checkbox" /></td>
                <td edit="true">v1</td>
                <td>v11</td>
                <td edit="true" edit-type="select" sel-val="1" global-key="STATUS">在線</td>
            </tr>
            <tr>
                <td><input type="checkbox" /></td>
                <td edit="true">v1</td>
                <td>v11</td>
                <td edit="true" edit-type="select" sel-val="2" global-key="STATUS">下線</td>
            </tr>
            <tr>
                <td><input type="checkbox" /></td>
                <td edit="true">v1</td>
                <td>v11</td>
                <td edit="true" edit-type="select" sel-val="1" global-key="STATUS">在線</td>
            </tr>
        </tbody>
    </table>

    <script type="text/javascript" src="js/jquery-2.2.3.js"></script>
    <script>
        /*
         監聽是否已經按下control鍵
         */
        window.globalCtrlKeyPress = false;

        window.onkeydown = function(event){
            if(event && event.keyCode == 17){
                window.globalCtrlKeyPress = true;
            }
        };
        window.onkeyup = function(event){
            if(event && event.keyCode == 17){
                window.globalCtrlKeyPress = false;
            }
        };

        /*
         按下Control，聯動表格中正在編輯的select
         */
        function MultiSelect(ths){
            if(window.globalCtrlKeyPress){
                var index = $(ths).parent().index();
                var value = $(ths).val();
                $(ths).parent().parent().nextAll().find("td input[type='checkbox']:checked").each(function(){
                    $(this).parent().parent().children().eq(index).children().val(value);
                });
            }
        }
    </script>
    <script type="text/javascript">

$(function(){
    BindSingleCheck('#edit_mode', '#tb1');
});

function BindSingleCheck(mode, tb){

    $(tb).find(':checkbox').bind('click', function(){
        var $tr = $(this).parent().parent();
        if($(mode).hasClass('editing')){
            if($(this).prop('checked')){
                RowIntoEdit($tr);
            }else{
                RowOutEdit($tr);
            }
        }
    });
}

function CreateSelect(attrs,csses,option_dict,item_key,item_value,current_val){
    var sel= document.createElement('select');
    $.each(attrs,function(k,v){
        $(sel).attr(k,v);
    });
    $.each(csses,function(k,v){
        $(sel).css(k,v);
    });
    $.each(option_dict,function(k,v){
        var opt1=document.createElement('option');
        var sel_text = v[item_value];
        var sel_value = v[item_key];

        if(sel_value==current_val){
            $(opt1).text(sel_text).attr('value', sel_value).attr('text', sel_text).attr('selected',true).appendTo($(sel));
        }else{
            $(opt1).text(sel_text).attr('value', sel_value).attr('text', sel_text).appendTo($(sel));
        }
    });
    return sel;
}

STATUS = [
    {'id': 1, 'value': "在線"},
    {'id': 2, 'value': "下線"}
];

BUSINESS = [
    {'id': 1, 'value': "車上會"},
    {'id': 2, 'value': "二手車"}
];

function RowIntoEdit($tr){
    $tr.children().each(function(){
        if($(this).attr('edit') == "true"){
            if($(this).attr('edit-type') == "select"){
                var select_val = $(this).attr('sel-val');
                var global_key = $(this).attr('global-key');
                var selelct_tag = CreateSelect({"onchange": "MultiSelect(this);"}, {}, window[global_key], 'id', 'value', select_val);
                $(this).html(selelct_tag);
            }else{
                var orgin_value = $(this).text();
                var temp = "<input value='"+ orgin_value+"' />";
                $(this).html(temp);
            }

        }
    });
}

function RowOutEdit($tr){
    $tr.children().each(function(){
        if($(this).attr('edit') == "true"){
            if($(this).attr('edit-type') == "select"){
                var new_val = $(this).children(':first').val();
                var new_text = $(this).children(':first').find("option[value='"+new_val+"']").text();
                $(this).attr('sel-val', new_val);
                $(this).text(new_text);
            }else{
                var orgin_value = $(this).children().first().val();
                $(this).text(orgin_value);
            }

        }
    });
}

function CheckAll(mode, tb){
    if($(mode).hasClass('editing')){

        $(tb).children().each(function(){

            var tr = $(this);
            var check_box = tr.children().first().find(':checkbox');
            if(check_box.prop('checked')){

            }else{
                check_box.prop('checked',true);

                RowIntoEdit(tr);
            }
        });

    }else{

        $(tb).find(':checkbox').prop('checked', true);
    }
}

function CheckReverse(mode, tb){

    if($(mode).hasClass('editing')){

        $(tb).children().each(function(){
            var tr = $(this);
            var check_box = tr.children().first().find(':checkbox');
            if(check_box.prop('checked')){
                check_box.prop('checked',false);
                RowOutEdit(tr);
            }else{
                check_box.prop('checked',true);
                RowIntoEdit(tr);
            }
        });


    }else{
        //
        $(tb).children().each(function(){
            var tr = $(this);
            var check_box = tr.children().first().find(':checkbox');
            if(check_box.prop('checked')){
                check_box.prop('checked',false);
            }else{
                check_box.prop('checked',true);
            }
        });
    }
}

function CheckCancel(mode, tb){
    if($(mode).hasClass('editing')){
        $(tb).children().each(function(){
            var tr = $(this);
            var check_box = tr.children().first().find(':checkbox');
            if(check_box.prop('checked')){
                check_box.prop('checked',false);
                RowOutEdit(tr);

            }else{

            }
        });

    }else{
        $(tb).find(':checkbox').prop('checked', false);
    }
}

function EditMode(ths, tb){
    if($(ths).hasClass('editing')){
        $(ths).removeClass('editing');
        $(tb).children().each(function(){
            var tr = $(this);
            var check_box = tr.children().first().find(':checkbox');
            if(check_box.prop('checked')){
                RowOutEdit(tr);
            }else{

            }
        });

    }else{

        $(ths).addClass('editing');
        $(tb).children().each(function(){
            var tr = $(this);
            var check_box = tr.children().first().find(':checkbox');
            if(check_box.prop('checked')){
                RowIntoEdit(tr);
            }else{

            }
        });

    }
}


    </script>

</body>
</html>

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