• jQuery学习笔记——jQuery选择器详解种类与方法


    jQuery的选择器根据页面中元素的不同,可以分为基本选择器、层次选择器、表单选择器、过滤选择器,而过滤选择器又有简单过滤选择器、内容过滤选择器、可见性过滤选择器、属性过滤选择器、子元素过滤选择器和表单对象属性选择器6种。(图片序号与文章序号不一致,以文章序号为准)

    一、基本选择器:

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.4.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    .clsFrame
    {width:300px;height:100px}
    .clsFrame div,span
    {display:none;float:left;width:65px;height:65px;border:solid 1px #ccc;margin:8px;}
    .clsOne
    {background-color:#EEE}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    '#divOne').css('display','block');//选择id为divOne的标签
    });
    $(
    function(){
    $(
    'div span').css('display','block');//选择div中的所有span标签
    });
    $(
    function(){
    $(
    '.clsFrame').css('display','block');//选择class为clsFrame的标签
    });
    $(
    function(){
    $(
    '*').css('display','block');//选择所有的内容
        });
    $(
    function(){
    $(
    '#divOne,span').css('display','block');//选择id为divOne和标签为span的所有标签
    });
    </script>
    <div class="clsFrame">
    <div id="divOne">ID</div>
    <div class="clsOne">CLASS</div>
    <span>SPAN</span>
    </div>

    </body>
    </html>

    二、层次选择器:

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    div,span
    {float:left;border:solid 1px #ccc;margin:8px;display:none}
    .clsFraA
    {width:65px;height:65px}
    .clsFraP
    {width:45px;height:45px;background-color:#eee}
    .clsFraC
    {width:25px;height:25px;background-color:#ddd}
    .a
    {width:15px;height:15px;background-color:#bbb}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    '#divMid').css('display','block');
    $(
    'div span').css('display','block');//选择div中的所有span标签
    });
    $(
    function(){
    $(
    '#divMid').css('display','block');
    $(
    'div>span').css('display','block');//选择div中的子标签(div中第一层span标签)
    });
    $(
    function(){
    $(
    '#divMid+div').css('display','block');//选择id为divMid的下一个div标签(这里的div必须与该ID标签相邻)
    $('#divMid').next().css('display','block');//选择该ID后的一个标签(任意)
    });
    $(
    function(){
    $(
    '#divMid~div').css('display','block');//选择id 为divMid后边所有的div标签
    $('#divMid').nextAll().css('display','block');//选择该ID后的所有标签
    });
    $(
    function(){
    $(
    '#divMid').siblings('div').css('display','block');//选择该ID相邻的所有标签
    });
    </script>
    <div class="clsFraA">Left</div>
    <div class="clsFraA" id="divMid">
    <span class="clsFraP" id="Span1">Span1
    <span class="clsFraC" id="Span2">Span2</span>
    </span>
    </div>
    <span class="a">Test</span>
    <div class="clsFraA">Right_1</div>
    <div class="clsFraA">Right_2</div>
    </body>
    </html>

    三、表单选择器:

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.4.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    form
    {width:241px}
    textarea,select,button,input,span
    {display:none}
    .btn
    {border:#666 solid 1px;padding:2px;width:60px;filter:progid:DXImageTransform.Mircrosoft.Gradient(GradientType=0,StartColorStr=#ffffff,EndColorStr=#ECE9D0);}
    .txt
    {border:#666 1px solid;padding:3px}
    .img
    {padding:2px;border:#ccc 1px solid}
    .div
    {border:solid 1px solid;background-color:#eee;padding:5px}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    '#form1 div').html('表单共找出Input类型元素。。。'+$('#form1 :input').length);//选择子标签
    $(
    '#form1 div').addClass('div');
    });
    $(
    function(){
    $(
    '#form1 :text').show(3000);//选择form中的类型为text的标签
    });
    $(
    function(){
    $(
    '#form1 :password').show(3000);
    });
    $(
    function(){
    $(
    '#form1 :radio').show(3000);
    $(
    '#form1 #Span1').show(3000);
    });
    $(
    function(){
    $(
    '#form1 :image').show(3000);
    });
    </script>
    <form method="post" action="" id="form1">
    <textarea name="" rows="" cols="" class="txt">TextArea</textarea>
    <select name="">
    <option value="0">Item 0</option>
    </select>
    <input type="text" name="" value="Text" class="txt" />
    <input type="password" name="" value="Password" class="txt" />
    <input type="radio" name=""/><span id="Span1">Radio</span>
    <input type="checkbox" name="" />
    <span id="Span2">CheckBox</span>
    <input type="submit" name="" value="submit" class="btn" />
    <input type="image" name="" title="Image" src="http://img.baidu.com/img/logo-news.gif" class="img" />
    <input type="reset" value="Reset" class="btn"/>
    <input type="button" value="Button" onclick="" class="btn" />
    <input type="file" name="" title="File" class="txt" />
    <div id="divShow"></div>
    </form>
    </body>
    </html>


    四、过滤器选择器:

      1、简单过滤选择器:

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.4.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    div
    {width:241px;height:83px;border:solid 1px #eee}
    h1
    {font-size:13px;}
    ul
    {list-style-type:none;padding:0px}
    .DefClass,.NotClass
    {height:23px;width:60px;line-height:23px;float:left;border-top:solid 1px #eee;border-bottom:solid 1px #eee}
    .GetFocus
    {width:58px;border:solid 1px #666;background-color:#eee}
    #spanMove
    {width:238px;height:23px;line-height:23px}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    'li:first').addClass('GetFocus');//第一个
    });
    $(
    function(){
    $(
    'li:last').addClass('GetFocus');//最后一个
    });
    $(
    function(){
    $(
    'li:not(.NotClass)').addClass('GetFocus');//非
    });
    $(
    function(){
    $(
    'li:even').addClass('GetFocus');//取偶数,从0开始
    });
    $(
    function(){
    $(
    'li:odd').addClass('GetFocus');//取奇数,从0开始
    });
    $(
    function(){
    $(
    'li:eq(2)').addClass('GetFocus');//等于2,从0开始
    });
    $(
    function(){
    $(
    'li:gt(1)').addClass('GetFocus');//大于1
    });
    $(
    function(){
    $(
    'li:lt(2)').addClass('GetFocus');//小于2
    });
    $(
    function(){
    $(
    'div h1').css('width','238');
    $(
    ':header').addClass('GetFocus');//标题类元素
    });
    $(
    function(){
    animateIt();
    $(
    '#spnMove:animated').addClass('GetFocus');//增加动画效果元素
    });
    function animateIt(){//动画函数
    $(
    '#spnMove').slideToggle('slow',animateIt);
    }
    </script>
    <div>
    <h1>基本过滤选择器</h1>
    <ul>
    <li class="DefClass">Item 0</li>
    <li class="DefClass">Item 1</li>
    <li class="NotClass">Item 2</li>
    <li class="DefClass">Item 3</li>
    </ul>
    <span id="spnMove">Span Move</span>
    </div>

    </body>
    </html>

      2、内容过滤选择器

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.4.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    div
    {float:left;border:solid 1px #ccc;margin:8px;width:65px;height:65px;display:none}
    span
    {float:left;border:solid 1px #ccc;margin:8px;width:45px;height:45px;background-color:#eee}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    'div:contains("a")').css('display','block');//给定文本中有“A”
    });
    $(
    function(){
    $(
    'div:empty').css('display','block');//空div的
    });
    $(
    function(){
    $(
    'div:has(span)').css('display','block');//div中有子标签是span的
    });
    $(
    function(){
    $(
    'div:parent').css('display','block');//含有子标签或文本的
    });
    </script>
    <div>ABCD</div>
    <div><span></span></div>
    <div>EFaH</div>
    <div></div>

    </body>
    </html>

      3、可见性过滤选择器

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.4.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    div,span
    {float:left;border:solid 1px #ccc;margin:8px;width:65px;height:65px}
    .GetFocus
    {border:solid 1px #666;background-color:#eee}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    'span:hidden').show();
    $(
    'div:visible').addClass('GetFocus');
    });
    $(
    function(){
    $(
    'span:hidden').show().addClass('GetFocus');
    });
    </script>
    <span style="display:none">Hidden</span>
    <div>Visible</div>
    </body>
    </html>

      4、属性过滤选择器:

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    div
    {float:left;border:solid 1px #ccc;margin:8px;width:65px;height:65px;display:none}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    'div[id]').show(3000);//选出div中包含ID的标签
    });
    $(
    function(){
    $(
    'div[title="A"]').show(3000);//选出div中title是A的标签
    });
    $(
    function(){
    $(
    'div[title!="A"]').show(3000);//选出div中title不是A的标签
    });
    $(
    function(){
    $(
    'div[title^="A"]').show(3000);//选出div中的title是以A开头的
    });
    $(
    function(){
    $(
    'div[title$="C"]').show(3000);//选出id中title是以C为结尾的
    });
    $(
    function(){
    $(
    'div[title*="B"]').show(3000);//选出div中title中有B的
    });
    $(
    function(){
    $(
    'div[id="divAB"][title*="B"]').show(3000);//选出div中ID为divAB并且title中含有B
    });
    </script>
    <div id="divID">ID</div>
    <div title="A">Title A</div>
    <div id="divAB" title="AB">ID <br />Title AB</div>
    <div title="ABC">Title ABC</div>
    </body>
    </html>

      5、子元素过滤选择器:

    <!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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    ul
    {width:250px;list-style-type:none;padding:0px}
    ul li
    {height:23px;width:60px;line-height:23px;float:left;border:solid 1px #eee;border-bottom:solid 1px #eee;margin-bottom:5px}
    .GetFocus
    {width:58px;border:solid 1px #666;background-color:#eee}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    'li:nth-child(2)').addClass('GetFocus');//li中第二个字子元素  :nth-child(eq/even/odd/index)
    });
    $(
    function(){
    $(
    'li:first-child').addClass('GetFocus');//li中第一个子元素
    });
    $(
    function(){
    $(
    'li:last-child').addClass('GetFocus');//li中最后一个子元素
    });
    $(
    function(){
    $(
    'li:only-child').addClass('GetFocus');//li中有唯一一个元素
    });
    </script>
    <ul>
    <li>Item 1-0</li>
    <li>Item 1-1</li>
    <li>Item 1-2</li>
    <li>Item 1-3</li>
    </ul>
    <ul>
    <li>Item 2-0</li>
    <li>Item 2-1</li>
    <li>Item 2-2</li>
    <li>Item 2-3</li>
    </ul>
    <ul>
    <li>Item 3-0</li>
    </ul>
    </body>
    </html>


      6、表单对象属性过滤选择器:

    <!DOCTaYPE 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>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta name="keywords" content=" keywords" />
    <meta name="description" content="description" />
    </head>
    <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
    <style type="text/css">
    body
    {font-size:12px;text-align:center}
    div
    {display:none}
    select
    {height:65px}
    .clsIpt
    {width:100px;padding:3px}
    .GetFocus
    {border:solid 1px #666 ;background-color:#eee}
    </style>
    <body>
    <script type="text/javascript">
    $(
    function(){
    $(
    '#divA').show(3000);
    $(
    '#form1 input:enabled').addClass('GetFocus');//input标签中enabled
    });
    $(
    function(){
    $(
    '#divA').show(3000);
    $(
    '#form1 input:disabled').addClass('GetFocus');
    });
    $(
    function(){
    $(
    '#divB').show(3000);
    $(
    '#divB input:checked').addClass('GetFocus');//input中的checked
    });
    $(
    function(){
    $(
    '#divC').show(3000);
    $(
    '#Span2').html('选中项是'+$('select option:selected').text());//select中option的selected项
    });
    </script>
    <form method="post" action="" id="form1" style="241px">
    <div id="divA">
    <input type="text" name="" class="clsIpt" value="可用文本" />
    <input type="text" name="" class="clsIpt" disabled="disabled" value="不可用文本框" />
    </div>
    <div id="divB">
    <input type="checkbox" name="" value="1" checked="checked" />选中
    <input type="checkbox" name="" value="0" />未选中
    </div>
    <div id="divC">
    <select name="">
    <option value="0">Item 0</option>
    <option value="1" selected="selected">Item 1</option>
    <option value="2">Item 2</option>
    <option value="3" selected="selected">Item 3</option>
    </select>
    <span id="Span2"></span>
    </div>
    </form>
    </body>
    </html>


    From:Picaso博客~~~http://www.cnblogs.com/picaso/

  • 相关阅读:
    CCF-CSP的第三题们么
    STL
    信息安全-期末复习
    NLP自然语言处理
    python 处理文件
    信息安全-简易的DES加解密--3DES
    试药的常见问题
    关于试药的那些事
    Excel的单列和多列的拆分与合并
    Excel中的文本提取操作
  • 原文地址:https://www.cnblogs.com/picaso/p/2432098.html
Copyright © 2020-2023  润新知