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实现网页顶部加载条loading.html
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<!DOCTYPE html>
<!--
_ooOoo_
o8888888o
88" . "88
(| -_- |)
O\ = /O
____/`---'\____
.' \\| |// `.
/ \\||| : |||// \
/ _||||| -:- |||||- \
| | \\\ - /// | |
| \_| ''\---/'' | |
\ .-\__ `-` ___/-. /
___`. .' /--.--\ `. . __
."" '< `.___\_<|>_/___.' >'"".
| | : `- \`.;`\ _ /`;.`/ - ` : | |
\ \ `-. \_ __\ /__ _/ .-` / /
======`-.____`-.___\_____/___.-`____.-'======
`=---='
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
佛祖保佑 永无BUG
-->
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<head>
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<meta name="description" content="为什么要加loading的效果一款好的产品，都需要有一个漂亮的loading界面。lodaing界面不仅能给用户带来良好的体验，而且有效的消除了程序加载等待过程中的枯躁感。loading进度条更是对当前加载进度的一个良好反馈。从0%-100%的加载进度可以有效的告知用户还有多久即可打开页面。带有进度条的loading界面在程序中并不罕见，但是在web中呢？到目前为止浏览器并没有提供有效的浏览器对象">
<meta property="og:type" content="article">
<meta property="og:title" content="实现网页顶部加载条loading">
<meta property="og:url" content="http://mydearest.cn/%E5%AE%9E%E7%8E%B0%E7%BD%91%E9%A1%B5%E9%A1%B6%E9%83%A8%E5%8A%A0%E8%BD%BD%E6%9D%A1loading.html">
<meta property="og:site_name" content="cosyer's Blog">
<meta property="og:description" content="为什么要加loading的效果一款好的产品，都需要有一个漂亮的loading界面。lodaing界面不仅能给用户带来良好的体验，而且有效的消除了程序加载等待过程中的枯躁感。loading进度条更是对当前加载进度的一个良好反馈。从0%-100%的加载进度可以有效的告知用户还有多久即可打开页面。带有进度条的loading界面在程序中并不罕见，但是在web中呢？到目前为止浏览器并没有提供有效的浏览器对象">
<meta property="article:published_time" content="2018-09-10T11:54:52.000Z">
<meta property="article:modified_time" content="2018-12-15T05:37:34.200Z">
<meta property="article:author" content="陈宇（cosyer）">
<meta property="article:tag" content="知识">
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<link rel="canonical" href="http://mydearest.cn/实现网页顶部加载条loading.html"/>
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<div class="post-date" data-datetime="2018-12-15T13:37:34+08:00">
<div class="post-time-text">12月</div>
<div class="post-time-count">15</div>
<div class="text-desc">
<div class="date-text">更新于</div>
<div class="post-tiem">12月15</div>
<div class="post-year">2018</div>
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<meta itemprop="name" content="陈宇（cosyer）">
<meta itemprop="description" content="不去做的话永远也做不到。">
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<h2 class="post-title" itemprop="name headline">实现网页顶部加载条loading</h2>
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<span class="post-meta-item-text">发表于</span>
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2018-09-10
</time>
</span>
<span id="/%E5%AE%9E%E7%8E%B0%E7%BD%91%E9%A1%B5%E9%A1%B6%E9%83%A8%E5%8A%A0%E8%BD%BD%E6%9D%A1loading.html" class="leancloud_visitors" data-flag-title="实现网页顶部加载条loading">
<span class="post-meta-divider">|</span>
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<span class="post-meta-item-text">热度 </span>
<span class="leancloud-visitors-count"></span> ℃
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<span class="post-meta-item-text">字数统计：</span>
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<h3 id="为什么要加loading的效果"><a href="#为什么要加loading的效果" class="headerlink" title="为什么要加loading的效果"></a>为什么要加loading的效果</h3><p>一款好的产品，都需要有一个漂亮的loading界面。lodaing界面不仅能给用户带来良好的体验，而且有效的消除了程序加载等待过程中的枯躁感。loading进度条更是对当前加载进度的一个良好反馈。从0%-100%的加载进度可以有效的告知用户还有多久即可打开页面。带有进度条的loading界面在程序中并不罕见，但是在web中呢？到目前为止浏览器并没有提供有效的浏览器对象来反馈页面的加载进度，所以无法直接、便捷的获得页面加载进度的反馈。</p>
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<h3 id="jquery实现"><a href="#jquery实现" class="headerlink" title="jquery实现"></a>jquery实现</h3><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></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">id</span>=<span class="string">"progress"</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">span</span>></span><span class="tag"></<span class="name">span</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><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></pre></td><td class="code"><pre><span class="line"><span class="selector-tag">body</span>{ </span><br><span class="line"> <span class="attribute">margin</span>:<span class="number">0</span>; </span><br><span class="line"> } </span><br><span class="line"> <span class="selector-id">#progress</span> { </span><br><span class="line"> <span class="attribute">position</span>:fixed; </span><br><span class="line"> <span class="attribute">height</span>: <span class="number">2px</span>; </span><br><span class="line"> <span class="attribute">background</span>:<span class="number">#6bc30d</span>; </span><br><span class="line"> <span class="attribute">transition</span>:opacity <span class="number">500ms</span> linear </span><br><span class="line"> } </span><br><span class="line"> <span class="selector-id">#progress</span><span class="selector-class">.done</span> { </span><br><span class="line"> <span class="attribute">opacity</span>:<span class="number">0</span> </span><br><span class="line"> } </span><br><span class="line"> <span class="selector-id">#progress</span> <span class="selector-tag">span</span> { </span><br><span class="line"> <span class="attribute">position</span>:absolute; </span><br><span class="line"> <span class="attribute">height</span>:<span class="number">2px</span>; </span><br><span class="line"> <span class="attribute">-webkit-box-shadow</span>:<span class="number">#6bc30d</span> <span class="number">1px</span> <span class="number">0</span> <span class="number">6px</span> <span class="number">1px</span>; </span><br><span class="line"> <span class="attribute">-webkit-border-radius</span>:<span class="number">100%</span>; </span><br><span class="line"> <span class="attribute">opacity</span>:<span class="number">1</span>; </span><br><span class="line"> <span class="attribute">width</span>:<span class="number">150px</span>; </span><br><span class="line"> <span class="attribute">right</span>:-<span class="number">10px</span>; </span><br><span class="line"> <span class="attribute">-webkit-animation</span>:pulse <span class="number">2s</span> ease-out <span class="number">0s</span> infinite; </span><br><span class="line"> } </span><br><span class="line"> </span><br><span class="line"> <span class="keyword">@-webkit-keyframes</span> pulse { </span><br><span class="line"> 30% { </span><br><span class="line"> <span class="attribute">opacity</span>:.<span class="number">6</span> </span><br><span class="line"> } </span><br><span class="line"> 60% { </span><br><span class="line"> <span class="attribute">opacity</span>:<span class="number">0</span>; </span><br><span class="line"> } </span><br><span class="line"> 100% { </span><br><span class="line"> <span class="attribute">opacity</span>:.<span class="number">6</span> </span><br><span class="line"> } </span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<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></pre></td><td class="code"><pre><span class="line">$({<span class="attr">property</span>: <span class="number">0</span>}).animate({<span class="attr">property</span>: <span class="number">100</span>}, { </span><br><span class="line"> duration: <span class="number">2000</span>, </span><br><span class="line"> step: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{ </span><br><span class="line"> <span class="keyword">var</span> percentage = <span class="built_in">Math</span>.round(<span class="keyword">this</span>.property); </span><br><span class="line"> </span><br><span class="line"> $(<span class="string">'#progress'</span>).css(<span class="string">'width'</span>, percentage+<span class="string">"%"</span>); </span><br><span class="line"> </span><br><span class="line"> <span class="keyword">if</span>(percentage == <span class="number">100</span>) { </span><br><span class="line"> $(<span class="string">"#progress"</span>).addClass(<span class="string">"done"</span>);<span class="comment">//完成，隐藏进度条 </span></span><br><span class="line"> } </span><br><span class="line"> } </span><br><span class="line">});</span><br></pre></td></tr></table></figure>
<h3 id="tip"><a href="#tip" class="headerlink" title="tip"></a>tip</h3><ul>
<li>这种方法简单明了，但兼容性不是太好。主流的浏览器肯定没有问题，但如果考虑IE兼容性的，就不要用此方法了。</li>
<li>duration是设置时间的。默认是2秒。换算代码：2000=2秒</li>
<li>请引入jquery库文件。否则程序不会运行</li>
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<p><span>文章作者:</span><a href="/" title="访问 陈宇（cosyer） 的个人博客">陈宇（cosyer）</a></p>
<p><span>发布时间:</span>2018年09月10日 - 19:09</p>
<p><span>最后更新:</span>2018年12月15日 - 13:12</p>
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