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<div class="jquery-head"><br> <center><h1>Jquery的一些基础回顾复习</h1></center><br></div>
<h1 id="jquery函数"><a href="#jquery函数" class="headerlink" title="jquery函数"></a>jquery函数</h1><p><code>$(document).ready(fn) / $(fn)</code></p>
<ol>
<li><p><code>window.onload</code> 与 <code>$(document).ready(fn)的区别</code><br/><br>1.1 <code>window.onload</code> 需要等待页面完全加载完毕才能触发，即所有的Dom元素创建完毕、图片、Css等加载完毕后才可以触发。<br/> <code>$(document).ready()</code> 只要Dom元素加载完成就可以触发，这样可以提供响应速度<br/><br>1.2 <code>$(document).ready()</code>可以注册多次事件处理程序，并且最终都会执行</br>而 <code>window.onload</code> 每次注册新的事件处理程序时都会将前面的覆盖掉</p>
</li>
<li><p>使用jQuery实现 <code>window.onload</code> 的效果：<code>$(window).load(fn)</code></p>
</li>
</ol>
<p><code>$.map(array,callback(element,index))</code></p>
<p>对于数组 <code>array</code> 中的每个元素，调用 <code>callback()</code> 函数，最终返回一个新的数组，原数组不变</p>
<p>Example： </p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> arrInt = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">7</span>]; </span><br><span class="line"><span class="keyword">var</span> arrIntNEW = $.map(arrInt, <span class="function"><span class="keyword">function</span>(<span class="params">element, index</span>)</span>{</span><br><span class="line"> <span class="keyword">if</span> (index > <span class="number">3</span>){</span><br><span class="line"> <span class="keyword">return</span> element * <span class="number">2</span>; </span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">return</span> element;</span><br><span class="line"> }</span><br><span class="line">});</span><br><span class="line"><span class="built_in">console</span>.log(arrIntNEW);</span><br></pre></td></tr></table></figure>
<p><code>$.each(array,fn)</code></p>
<p>遍历数组，通过 <code>return false</code> 来退出循环，不能使用 <code>break</code> 来提出循环</p>
<p> Example：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> arrInt = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">7</span>]; </span><br><span class="line"> $.each(arrInt, <span class="function"><span class="keyword">function</span>(<span class="params">key, value</span>)</span>{</span><br><span class="line"> <span class="keyword">if</span>(key == <span class="number">3</span>){</span><br><span class="line"> <span class="keyword">return</span> <span class="literal">false</span>; <span class="comment">//跳出循环</span></span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//当使用each遍历，普通的数组的时候，索引就是键，值就是值</span></span><br><span class="line"> <span class="built_in">console</span>.log(key + <span class="string">' , '</span> + value);</span><br><span class="line">});</span><br></pre></td></tr></table></figure>
<p><code>$.trim(字符串)</code></p>
<p>去掉两端空格，启动调试，可以F11进去源码查看原理</p>
<p>Example：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> msg = <span class="string">' hello '</span>; </span><br><span class="line"><span class="built_in">console</span>.log(msg);</span><br><span class="line"><span class="built_in">console</span>.log($.trim(msg)); <span class="comment">//去掉两边空格</span></span><br></pre></td></tr></table></figure>
<h1 id="jquery对象与Dom对象"><a href="#jquery对象与Dom对象" class="headerlink" title="jquery对象与Dom对象"></a>jquery对象与Dom对象</h1><p>Example：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">window</span>.onload = <span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span><br><span class="line"> <span class="built_in">document</span>.getElementById(<span class="string">'btn'</span>).onclick = <span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span><br><span class="line"> <span class="comment">//获取层对象</span></span><br><span class="line"> <span class="comment">//从页面上的元素对象才叫做dom对象，数值，日期对象，这些都不是dom对象</span></span><br><span class="line"> <span class="keyword">var</span> dvObj = <span class="built_in">document</span>.getElementById(<span class="string">'div1'</span>);</span><br><span class="line"> dvObj.innerText = <span class="string">'Hello!'</span>;</span><br><span class="line"> <span class="comment">//当直接使用dom对象的时候存在浏览器兼容性问题</span></span><br><span class="line"> <span class="comment">//为了解决浏览器的兼容性问题，所以这时可以把dom对象转为jQuery对象，然后再操作</span></span><br><span class="line"> <span class="comment">//把dom对象转换为jQuery对象后，就可以调用对应的所有的jQuery对象的成员了 </span></span><br><span class="line"> <span class="comment">// Dom -> jQuery</span></span><br><span class="line"> <span class="keyword">var</span> $dvObj = $(dvOjb); </span><br><span class="line"> $dvObj.text(<span class="string">'您好！);</span></span><br><span class="line"><span class="string"></span></span><br><span class="line"><span class="string"> // jQuery -> Dom (两种方法)</span></span><br><span class="line"><span class="string"> 1. var domDiv = $dvObj[0];</span></span><br><span class="line"><span class="string"> 2. var domDiv = $dvObj.get(0);</span></span><br><span class="line"><span class="string"> domDiv.innerText('</span>我现在是dom对象书写出来的文字<span class="string">');</span></span><br><span class="line"><span class="string"></span></span><br><span class="line"><span class="string"> //jQuery对象：</span></span><br><span class="line"><span class="string"> //可以把dom对象装换为jQuery对象</span></span><br><span class="line"><span class="string"> //也可以把jQuery对象转为dom对象</span></span><br><span class="line"><span class="string"> }</span></span><br><span class="line"><span class="string">}</span></span><br></pre></td></tr></table></figure>
<h1 id="jquery选择器"><a href="#jquery选择器" class="headerlink" title="jquery选择器"></a>jquery选择器</h1><ol>
<li>Id选择器 $(“#id”)</li>
<li>标签选择器 $(“input”);</li>
<li>类选择器 $(“.class”);</li>
<li>标签+类选择器 $(“p.text”);</li>
<li>组合选择器 $(“选择器1”,”选择器2”,”选择器3”，”……”);</li>
<li>层次选择器<br> 后代元素选择器：使用空格隔开 \$(“选择器1 选择器2”)，表示选取选择器1下所有的选择器2<br> 子元素选择器：使用 <code>></code> 隔开 \$(“选择器1 > 选择器2”)<br> 相邻元素选择器：使用 <code>+</code> 或者 <code>~</code> <pre><code>`+`：$(".a + div") == $(".a").next 如果相邻的不是div 则不会继续向后找
`~`：$(".a ~ div") == $(".a").nextAll() 获取类名为a之后的所有兄弟div元素
</code></pre> \$(“div”).prev(“span”); 获取div上一个兄弟元素，并且该元素必须是span<br> \$(“div”).prevAll(“span”); 获取div前面的所有span兄弟元素<br> \$(“div”).siblings(“span”); 获取div的所有span兄弟元素</li>
</ol>
<p>特点：链式方程/隐式迭代</p>
<p>Example1:</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span><br><span class="line"> $(<span class="string">"#bthSetText"</span>).click(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span><br><span class="line"> $(<span class="string">"p"</span>).text(<span class="string">"我被改变了"</span>).css(<span class="string">"background"</span>,<span class="string">"#ff9"</span>).mouseover(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span><br><span class="line"> $(<span class="keyword">this</span>).css(<span class="string">"background"</span>,<span class="string">"#ff9"</span>).siblings().css(<span class="string">"background"</span>,<span class="string">""</span>);</span><br><span class="line"> });</span><br><span class="line"> });</span><br><span class="line">});</span><br></pre></td></tr></table></figure>
<p>Example2:</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"><span class="tag"><<span class="name">ul</span> <span class="attr">id</span>=<span class="string">"target"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">li</span>></span>公牛<span class="tag"></<span class="name">li</span>></span></span><br><span class="line"><span class="tag"><<span class="name">li</span>></span>小牛<span class="tag"></<span class="name">li</span>></span></span><br><span class="line"><span class="tag"><<span class="name">li</span>></span>牛奶<span class="tag"></<span class="name">li</span>></span></span><br><span class="line"><span class="tag"><<span class="name">li</span>></span>母牛<span class="tag"></<span class="name">li</span>></span></span><br><span class="line"><span class="tag"></<span class="name">ul</span>></span></span><br><span class="line"></span><br><span class="line"><span class="tag"><<span class="name">scirpt</span>></span></span><br><span class="line">$(function(){</span><br><span class="line"> $("#target li").mouseover(function() {</span><br><span class="line"> //鼠标悬浮事件</span><br><span class="line"> $(this).css("background","#ff9").siblings('li').css("background","");</span><br><span class="line"> }).click(function(){</span><br><span class="line"> //单击事件</span><br><span class="line"> //有些方法会破坏链式编程中返回的对象，比如： next(),nextAll(),prev(),prevAll(),siblings()</span><br><span class="line"> //无参数的：text()、val()、html()</span><br><span class="line"> //当链式编程的链被破坏时可以用end()修复</span><br><span class="line"> $(this).prevAll().css("background","green").end().nextAll().css("background","blue");</span><br><span class="line">});</span><br><span class="line">});</span><br><span class="line"><span class="tag"></<span class="name">scirpt</span>></span></span><br></pre></td></tr></table></figure>
<p>jQuery1.6以后有以下区别，1.6之前都是用<code>attr</code></p>
<blockquote>
<p><code>attr()</code> 与 <code>prop()</code><br>对于HTML元素本身就带有的 <strong>固有</strong> 属性，在处理时，使用 <code>prop</code> 方法。<br>对于HTML元素我们自己 <strong>自定义</strong> 的DOM属性，在处理时，使用 <code>attr</code> 方法。</p>
</blockquote>
<h1 id="过滤选择器（-）"><a href="#过滤选择器（-）" class="headerlink" title="过滤选择器（:）"></a>过滤选择器（<code>:</code>）</h1><p><code>:first</code> 选取 <strong>第一个</strong> 元素 <code>$("div:first")</code><br><code>:last</code> 选取 <strong>最后一个</strong> 元素 <code>$("div:last")</code><br><code>:not(选择器)</code>选取 <strong>不满足选择器</strong> 条件的元素 <code>$("input:not(.myClass)")</code><br><code>:even</code> \ <code>:odd</code> 选取索引是 <strong>偶数</strong> 、<strong>奇数</strong> 的元素 <code>$("input:even")</code><br><code>:eq(索引序号)</code> \ <code>：gt(索引序号)</code> \ <code>:lt(索引序号)</code> 选取索引 <strong>等于</strong> 、<strong>大于</strong> 、<strong>小于</strong> 索引号的元素 <code>$("input:lt(5)")</code> | <code>$("input:lt(3):gt(0)")</code><br><code>:animated</code> 选取正在 <strong>执行动画</strong> 的 <code>div</code> 元素<br><code>$(".header")</code> 选取所有 <strong>h1…h6</strong> 元素 </p>
<p>Example1: </p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">name</span>=<span class="string">""</span> <span class="attr">id</span>=<span class="string">"btn"</span> <span class="attr">value</span>=<span class="string">"点我"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">table</span> <span class="attr">id</span>=<span class="string">"t"</span> <span class="attr">border</span>=<span class="string">"1"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>姓名<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>成绩<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>a<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>100<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>b<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>99<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>c<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>98<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>d<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>97<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>e<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>98<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>f<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>97<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>平均分<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>97<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span></span><br><span class="line"><span class="tag"></<span class="name">table</span>></span></span><br><span class="line"><span class="tag"><<span class="name">script</span>></span><span class="undefined"></span></span><br><span class="line"><span class="javascript"> $(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"#btn"</span>).click(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"#t tr:first"</span>).css(<span class="string">"font-size"</span>,<span class="string">"70px"</span>);</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"#t tr:gt(0):lt(3)"</span>).css(<span class="string">"font-size"</span>,<span class="string">"28px"</span>);</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"#t tr:last"</span>).css(<span class="string">"color"</span>,<span class="string">"red"</span>);</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"#t tr:odd:not(:last)"</span>).css(<span class="string">"background"</span>,<span class="string">"red"</span>);</span></span><br><span class="line"><span class="undefined"> });</span></span><br><span class="line"><span class="undefined"> });</span></span><br><span class="line"><span class="undefined"></span><span class="tag"></<span class="name">script</span>></span></span><br></pre></td></tr></table></figure>
<p>Example2: </p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">table</span> <span class="attr">id</span>=<span class="string">"b1"</span> <span class="attr">border</span>=<span class="string">"1"</span> <span class="attr">cellpadding</span>=<span class="string">"2"</span> <span class="attr">cellspacing</span>=<span class="string">"2"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span>></span>Aa<span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span></span><br><span class="line"><span class="tag"></<span class="name">table</span>></span></span><br><span class="line"><span class="tag"><<span class="name">script</span>></span><span class="undefined"></span></span><br><span class="line"><span class="javascript"> $(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"#b1 tr"</span>).click(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"td"</span>).css(<span class="string">"background"</span>,<span class="string">""</span>);</span></span><br><span class="line"><span class="javascript"> $(<span class="string">"td:even"</span>,$(<span class="keyword">this</span>)).css(<span class="string">"background"</span>,<span class="string">"red"</span>); <span class="comment">//$(this) == $("#b1 tr")</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"td:odd"</span>,$(<span class="keyword">this</span>)).css(<span class="string">"background"</span>,<span class="string">"blue"</span>);</span></span><br><span class="line"><span class="undefined"> });</span></span><br><span class="line"><span class="undefined"> });</span></span><br><span class="line"><span class="undefined"></span><span class="tag"></<span class="name">script</span>></span></span><br></pre></td></tr></table></figure>
<p><strong>$(“td:even”,$(this))</strong> 表示在上文鼠标所点击的 <code>tr</code> 里面来选择 <code>td</code> </p>
<h2 id="属性过滤选择器"><a href="#属性过滤选择器" class="headerlink" title="属性过滤选择器"></a>属性过滤选择器</h2><p><code>$("div[id]")</code> 选取有 <strong>id</strong> 属性的 <code><div></code><br><code>$("div[title=test]")</code> 选取 <strong>title</strong> 属性为test的 <code><div></code><br><code>$("div[title!=test]")</code> 选取 <strong>title</strong> 属性不为test的 <code><div></code><br>Example1: </p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a1"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a2"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a3"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a4"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a5"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a6"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a7"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"a8"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">script</span>></span><span class="undefined"></span></span><br><span class="line"><span class="javascript"> <span class="comment">//1.选取所有input属性，具有name属性的</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"input[name]"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//2.选取所有body下面具有name属性的元素</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name]"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//3.选取页面上具有name属性，同时name属性的开头为a的元素</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name^=a]"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//4.选取name属性为空的</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name=]"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//5.选取以name属性中a结尾的</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name$=a]"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//6.包含a的name的属性的元素</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name*=a]"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//7.name属性中不等于某个属性的</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name!='spec']"</span>).css();</span></span><br><span class="line"><span class="javascript"> <span class="comment">//8.同时具有多个属性的</span></span></span><br><span class="line"><span class="javascript"> $(<span class="string">"body *[name*=a] [id] [value]"</span>).css();</span></span><br><span class="line"><span class="undefined"></span><span class="tag"></<span class="name">script</span>></span></span><br></pre></td></tr></table></figure>
<h2 id="表单选择器"><a href="#表单选择器" class="headerlink" title="表单选择器"></a>表单选择器</h2><p><code>$(":input")</code> 选取所有<code><input></code>、<code><textarea></code>、<code><select></code> 和 <code><button></code><br><code>$("input")</code> 不一样，只获得 <code><input></code><br><code>$(":text")</code> == <code>$("input[type=text]")</code> 选取所有的单行文本框<br><code>$(":password");</code> 选取所有密码框<br>上述同理的还有 <code>:radio</code>、<code>:submit</code>、<code>:image</code>、<code>:reset</code>、<code>:button</code>、<code>:file</code>、<code>:hidden</code> （替代了<code>$("input[type=***]")</code>）</p>
<h2 id="表单对象属性过滤选择器"><a href="#表单对象属性过滤选择器" class="headerlink" title="表单对象属性过滤选择器"></a>表单对象属性过滤选择器</h2><p><code>$("#form :enabled")</code> 选取id为form的表单内所有 <strong>启用</strong> 的元素<br><code>$("#form :disabled")</code> 选取id为form的表单内所有 <strong>禁用</strong> 的元素<br><code>$("#input:checked")</code> 选取所有 <strong>选中</strong> 的元素(Radio/Checkbox),中间不可有空格<br><code>$("select :selected")</code> 选取所有选中的 <strong>选项</strong> 的元素(下拉列表)</p>
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