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<!DOCTYPE html>
<html>
<head> <meta charset="utf-8">
<meta name="viewport" content="width=device-width,height=device-height,initial-scale=1,user-scalable=0">
<meta name="author" content="微信公众号：颜家大少">
<meta name="email" content="[email protected]">
<meta name="description" content="一个Markdown在线转换工具，让Markdown内容，不需作任何调整就能同时在微信公众号、博客园、掘金、csdn等平台正确显示当前预览的效果">
<title>Md2All export document</title>
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</head><body><div id="export_content"><div class="output_wrapper" id="output_wrapper_id"><h1 id="hday34"><span>day34</span></h1>
<h3 id="hjquery"><span>jquery入门</span></h3>
<blockquote>
<p>（1）提供了强大的功能函数 <br>（2）解决浏览器兼容性问题 <br>（3）实现丰富的 UI 和插件 <br>（4）纠正错误的脚本知识</p>
</blockquote>
<p> "$"符号在 jQuery 中代表对 jQuery 对象的引用, "jQuery"是核心对象，通过该对象可以获取 jQuery 对象，调用 jQuery 提供的方法等。只有 jQuery 对象才能 调用 jQuery 提供的方法。</p>
<pre><code class="js language-js hljs javascript"><span class="linenum hljs-number"> 1</span><span class="hljs-keyword">var</span> div = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">"testDiv"</span>);<br><span class="linenum hljs-number"> 2</span><br><span class="linenum hljs-number"> 3</span><span class="hljs-comment">//jQuery 包装集|对象</span><br><span class="linenum hljs-number"> 4</span><span class="hljs-keyword">var</span> jQueryObject = $(<span class="hljs-string">"#testDiv"</span>);<br><span class="linenum hljs-number"> 5</span><br><span class="linenum hljs-number"> 6</span><span class="hljs-comment">//Dom 转 jQuery 对象</span><br><span class="linenum hljs-number"> 7</span><span class="hljs-keyword">var</span> domDiv = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">'mydiv'</span>); <span class="hljs-comment">// 获取 Dom 对象</span><br><span class="linenum hljs-number"> 8</span>mydiv = $(domDiv);<br><span class="linenum hljs-number"> 9</span><br><span class="linenum hljs-number">10</span><span class="hljs-comment">//jQuery 对象转 Dom 对象</span><br><span class="linenum hljs-number">11</span>jqueryDiv = $(<span class="hljs-string">'#mydiv'</span>);<br><span class="linenum hljs-number">12</span><span class="hljs-keyword">var</span> dom = jqueryDiv[<span class="hljs-number">0</span>];<br></code></pre>
<h3 id="h"><span>选择器</span></h3>
<p>（1）基础选择器</p>
<figure><img src="https://i.loli.net/2019/08/22/xuZ9Sfv5wBDbz2t.png" alt="1566484215339" title="1566484215339"><figcaption>1566484215339</figcaption></figure>
<p>（2）层次选择器</p>
<figure><img src="https://i.loli.net/2019/08/22/x5ucC4nVJIkH2Ar.png" alt="1566484429778" title="1566484429778"><figcaption>1566484429778</figcaption></figure>
<p>（3）form表单选择器</p>
<figure><img src="https://i.loli.net/2019/08/22/Veaur9wNY2l7sZR.png" alt="1566484481066" title="1566484481066"><figcaption>1566484481066</figcaption></figure>
<h3 id="h-1"><span>操作属性</span></h3>
<figure><img src="https://i.loli.net/2019/08/22/irgec2obuMFyq6G.png" alt="1566484535374" title="1566484535374"><figcaption>1566484535374</figcaption></figure>
<figure><img src="https://i.loli.net/2019/08/22/JlfNSLxq59uEUMz.png" alt="1566484580176" title="1566484580176"><figcaption>1566484580176</figcaption></figure></div></div></body>
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