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<div class="post-date" data-datetime="2020-04-23T00:08:43+08:00">
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<div class="post-time-count">23</div>
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<h2 class="post-title" itemprop="name headline">单页应用优缺点分析</h2>
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2018-07-26
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<span class="post-meta-item-text">热度 </span>
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424 (字)
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1 (分钟)
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<p>单页Web应用（single page web application，SPA），就是只有一张Web页面的应用。单页应用程序 (SPA) 是加载单个HTML 页面并在用户与应用程序交互时动态更新该页面的Web应用程序。浏览器一开始会加载必需的HTML、CSS和JavaScript，所有的操作都在这张页面上完成，都由JavaScript来控制。</p>
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<h2 id="优点："><a href="#优点：" class="headerlink" title="优点："></a>优点：</h2><p>1、分离前后端关注点，前端负责界面显示，后端负责数据存储和计算，各司其职，不会把前后端的逻辑混杂在一起；前后台分离开发模式。</p>
<p>2、减轻服务器压力，服务器只用出数据就可以，不用管展示逻辑和页面合成，吞吐能力会提高几倍；</p>
<p>3、同一套后端程序代码，不用修改就可以用于Web界面、手机、平板等多种客户端；</p>
<ol start="4">
<li>服务器压力变小，后台不需要负责模板渲染，输出页面工作。ajax实现页面刷新，不需要重新加载整个页面。</li>
</ol>
<h2 id="缺点："><a href="#缺点：" class="headerlink" title="缺点："></a>缺点：</h2><p>1、SEO难度大，由于所有的内容都是在一个页面中动态替换显示，现在可以通过Prerender等技术解决一部分；</p>
<p>2、前进后退由路由管理，由于单页面应用在一个页面中显示所有的内容，所以不能使用浏览器的前进后退功能，所有页面的切换需要自己建立堆栈管理；</p>
<p>3、初次加载耗时多，为实现单页面web应用功能及显示效果，需要在加载页面的时候将js，css统一加载，部分页面按需加载；</p>
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<p><span>发布时间:</span>2018年07月26日 - 21:07</p>
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