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data-v-f16f934a>一文读懂函数中this指向问题</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E4%BB%8E0%E5%AE%9E%E7%8E%B0%E4%B8%80%E4%B8%AA%E5%B9%B4%E5%BA%A6%E6%8A%A5%E5%91%8A.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>从0实现一个年度报告</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E5%BD%BB%E5%BA%95%E6%90%9E%E6%87%82%E5%AF%B9%E8%B1%A1%E7%9A%84%E6%95%B0%E6%8D%AE%E5%B1%9E%E6%80%A7%E6%8F%8F%E8%BF%B0%E7%AC%A6%E3%80%81%E5%AD%98%E5%82%A8%E5%B1%9E%E6%80%A7%E6%8F%8F%E8%BF%B0%E7%AC%A6.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>彻底搞懂对象的数据属性描述符、存储属性描述符</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E6%B5%85%E6%9E%90defineProperty%E4%B8%8EProxy%E5%AE%9E%E7%8E%B0%E7%9A%84%E5%8F%8C%E5%90%91%E7%BB%91%E5%AE%9A.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>浅析defineProperty与Proxy实现的双向绑定</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E6%B7%B1%E5%85%A5JavaScript%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>深入JavaScript数据类型</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E6%B7%B1%E5%85%A5Vue3%E6%BA%90%E7%A0%81%EF%BC%8C%E7%9C%8B%E7%9C%8BVue.use%E5%90%8E%E7%A9%B6%E7%AB%9F%E5%8F%91%E7%94%9F%E4%BA%86%E4%BB%80%E4%B9%88%EF%BC%9F.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>深入Vue3源码，看看Vue.use后究竟发生了什么？</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3Proxy%E4%B8%8EReflect.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>深入理解Proxy与Reflect</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3%E6%B5%8F%E8%A7%88%E5%99%A8%E7%BC%93%E5%AD%98%E6%9C%BA%E5%88%B6.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>深入理解浏览器缓存机制</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/article/%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3%E6%B5%8F%E8%A7%88%E5%99%A8%E8%BF%90%E8%A1%8C%E5%8E%9F%E7%90%86.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>深入理解浏览器运行原理</p><!--]--></a><!----></div><!----></div><!--]--></div></section></div><div class="group" data-v-ea943bcb><section class="VPSidebarItem level-0 collapsible has-active" data-v-ea943bcb data-v-f16f934a><div class="item" role="button" tabindex="0" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><h2 class="text" data-v-f16f934a>学习笔记</h2><div class="caret" role="button" aria-label="toggle section" tabindex="0" data-v-f16f934a><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" viewbox="0 0 24 24" class="caret-icon" data-v-f16f934a><path d="M9,19c-0.3,0-0.5-0.1-0.7-0.3c-0.4-0.4-0.4-1,0-1.4l5.3-5.3L8.3,6.7c-0.4-0.4-0.4-1,0-1.4s1-0.4,1.4,0l6,6c0.4,0.4,0.4,1,0,1.4l-6,6C9.5,18.9,9.3,19,9,19z"></path></svg></div></div><div class="items" data-v-f16f934a><!--[--><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/JavaScript.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>JavaScript基础</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/CSS.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>CSS基础</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/JavaScriptEnhanced.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>JavaScript进阶</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/Front-end%20Engineering.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>前端工程化</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/SSR.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>服务端渲染</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/React.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>React基础</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/React%20Hooks.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>React Hooks</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/Redux.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>Redux</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/React%20Router.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>React Router</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-f16f934a data-v-f16f934a><div class="item" data-v-f16f934a><div class="indicator" data-v-f16f934a></div><a class="VPLink link link" href="/note/MySQL.html" data-v-f16f934a><!--[--><p class="text" data-v-f16f934a>MySQL</p><!--]--></a><!----></div><!----></div><!--]--></div></section></div><!--]--><!--[--><!--]--></nav></aside><div class="VPContent has-sidebar" id="VPContent" data-v-4b282efc data-v-3d0b81df><div class="VPDoc has-sidebar has-aside" data-v-3d0b81df data-v-f0e11dcf><!--[--><!--]--><div class="container" data-v-f0e11dcf><div class="aside" data-v-f0e11dcf><div class="aside-curtain" data-v-f0e11dcf></div><div class="aside-container" data-v-f0e11dcf><div class="aside-content" data-v-f0e11dcf><div class="VPDocAside" data-v-f0e11dcf data-v-0c849b30><!--[--><!--]--><!--[--><!--]--><div class="VPDocAsideOutline" data-v-0c849b30 data-v-ecb1c3c3><div class="content" data-v-ecb1c3c3><div class="outline-marker" data-v-ecb1c3c3></div><div class="outline-title" data-v-ecb1c3c3>On this page</div><nav aria-labelledby="doc-outline-aria-label" data-v-ecb1c3c3><span class="visually-hidden" id="doc-outline-aria-label" data-v-ecb1c3c3> Table of Contents for current page </span><ul class="root" data-v-ecb1c3c3 data-v-61596211><!--[--><!--]--></ul></nav></div></div><!--[--><!--]--><div class="spacer" data-v-0c849b30></div><!--[--><!--]--><!----><!--[--><!--]--><!--[--><!--]--></div></div></div></div><div class="content" data-v-f0e11dcf><div class="content-container" data-v-f0e11dcf><!--[--><!--]--><!----><main class="main" data-v-f0e11dcf><div style="position:relative;" class="vp-doc _note_React%20Router" data-v-f0e11dcf><div><h1 id="react-router" tabindex="-1">React Router <a class="header-anchor" href="#react-router" aria-label="Permalink to "React Router""></a></h1><h2 id="了解reactrouter" tabindex="-1">了解ReactRouter <a class="header-anchor" href="#了解reactrouter" aria-label="Permalink to "了解ReactRouter""></a></h2><p>三大框架都有各自的路由实现</p><ul><li>Angular ngRouter</li><li>React ReactRouter</li><li>Vue VueRouter</li></ul><p>React Router在最近两年的版本更新较快，并且在最新的React Router6发生了较大的变化</p><ul><li>Web开发只需要安装<code>react-router-dom</code></li><li><code>react-router</code>包含一些ReactNative的内容</li></ul><div class="language-bash line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">bash</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#FFCB6B;">npm</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">i</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">react-router-dom</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br></div></div><p>从<code>react-router-dom</code>中导出<code>BrowserRouter</code> 或 <code>HashRouter</code>，二者分别对应history模式与哈希模式</p><p>将App用二者之一包裹，即可启用路由：</p><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight has-highlighted-lines"><code><span class="line"><span style="color:#676E95;font-style:italic;">// index.js</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">StrictMode</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> ReactDOM </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-dom/client</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> App </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./App</span><span style="color:#89DDFF;">'</span></span>
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<span class="line highlighted"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">HashRouter</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"></span>
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<span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> root </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> ReactDOM</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">createRoot</span><span style="color:#A6ACCD;">(document</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">getElementById</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">root</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">))</span></span>
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<span class="line"><span style="color:#A6ACCD;">root</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">render</span><span style="color:#A6ACCD;">(</span></span>
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<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">StrictMode</span><span style="color:#89DDFF;">></span></span>
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<span class="line highlighted"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">HashRouter</span><span style="color:#89DDFF;">></span></span>
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<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">App</span><span style="color:#89DDFF;"> /></span></span>
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<span class="line highlighted"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">HashRouter</span><span style="color:#89DDFF;">></span></span>
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<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">StrictMode</span><span style="color:#89DDFF;">></span></span>
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<span class="line"><span style="color:#A6ACCD;">)</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br></div></div><p>路由的本质是路径与组件的映射关系（<code>path <==> component</code>）</p><p>ReactRouter不像VueRouter，它的路由映射关系是书写在组件中的：</p><p>下面的例子中使用到了几个<strong>组件</strong>：<code>Routes</code> <code>Route</code> <code>Navigate</code> <code>NavLink</code></p><ul><li><code>Routes</code> <code>Route</code>用来描述路径与组件的映射关系 <ul><li>通过为<code>path</code>和<code>element</code>传入路径和相对应的组件，将其包裹在<code>Routes</code>内即可完成路由的描述</li></ul></li><li><code>Navigate</code> 导航组件（在react-router5版本中是Redirect） <ul><li>可以帮我们完成重定向操作，将想要重定向的路径传递给组件的<code>to</code>属性</li><li><strong>当组件出现时，就会自动执行跳转</strong>，属于功能性组件</li><li>当访问根路径<code>/</code>时就会自动跳转到<code>/home</code>页</li></ul></li><li><code>NavLink</code>用来实现路由的跳转 <ul><li>特殊组件，其<code>className</code> <code>style</code>这些属性都可以传递一个函数</li><li>可以从函数参数中解构出<code>isActive</code>属性来动态绑定样式（实际场景应用较少）</li></ul></li></ul><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// App.js</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">PureComponent</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Routes</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Route</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Navigate</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">NavLink</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> Home </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./views/Home</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> About </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./views/About</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> NotFound </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./views/NotFound</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">class</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">App</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">extends</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">PureComponent</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">render</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">h1</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">App</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">h1</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">className</span><span style="color:#89DDFF;">={({</span><span style="color:#A6ACCD;"> </span><span style="color:#A6ACCD;font-style:italic;">isActive</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">})</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> (isActive </span><span style="color:#89DDFF;">?</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">link-active</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">''</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> Home</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/about</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">style</span><span style="color:#89DDFF;">={({</span><span style="color:#A6ACCD;"> </span><span style="color:#A6ACCD;font-style:italic;">isActive</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">})</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> (</span><span style="color:#89DDFF;">{</span><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">color</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> isActive </span><span style="color:#89DDFF;">?</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">red</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">''</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> About</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Routes</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">Navigate</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">Home</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/about</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">About</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">*</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">NotFound</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">Routes</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br></div></div><p>另外，这里还有一个小技巧，在最末一个路由指定一个path为<code>*</code>的路由匹配规则，可以为路由匹配添加fallback策略，当未匹配到其之前的任何域名时，会展示NotFound页面</p><h2 id="嵌套路由" tabindex="-1">嵌套路由 <a class="header-anchor" href="#嵌套路由" aria-label="Permalink to "嵌套路由""></a></h2><p>嵌套路由可以通过在<code>Route</code>组件内部嵌套新的<code>Route</code>组件来实现</p><p>再通过<code>Outlet</code>组件来指定嵌套路由的占位元素（类似于VueRouter中的router-view）</p><p>我们在之前的例子的基础上，为Home页面添加两个子页面HomeRanking和HomeRecommand</p><p>同时，我们也应该为Home组件添加默认跳转，就像根路径默认重定向到Home组件那样，进入到Home组件后也应该默认重定向一个子页面中，这里我们仍然使用到了Navigate组件</p><div class="vp-code-group"><div class="tabs"><input type="radio" name="group-3qIHf" id="tab-x-4QVaK" checked="checked"><label for="tab-x-4QVaK">App.jsx </label><input type="radio" name="group-3qIHf" id="tab-OQypl_r"><label for="tab-OQypl_r">Home.jsx</label></div><div class="blocks"><div class="language-tsx active line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// App.jsx</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">PureComponent</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Routes</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Route</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Navigate</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">NavLink</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> Home </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./views/Home</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> HomeRanking </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./views/HomeRanking</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> HomeRecommand </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./views/HomeRecommand</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">class</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">App</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">extends</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">PureComponent</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">render</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Routes</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">Home</span><span style="color:#89DDFF;"> />}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">Navigate</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home/ranking</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home/ranking</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">HomeRanking</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">path</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home/recommand</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">element</span><span style="color:#89DDFF;">={<</span><span style="color:#FFCB6B;">HomeRecommand</span><span style="color:#89DDFF;"> />}></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">Route</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">Routes</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br></div></div><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// Home.jsx</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">PureComponent</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">NavLink</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Outlet</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">class</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">Home</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">extends</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">PureComponent</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">render</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">Home</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home/ranking</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">Ranking</span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;">></span></span>
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<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Outlet</span><span style="color:#89DDFF;">></</span><span style="color:#FFCB6B;">Outlet</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
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<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
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<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br></div></div></div></div><h2 id="编程式导航-高阶组件" tabindex="-1">编程式导航（高阶组件） <a class="header-anchor" href="#编程式导航-高阶组件" aria-label="Permalink to "编程式导航（高阶组件）""></a></h2><p>之前使用的ReactRouter提供的路由跳转的组件，无论是<code>Link</code>还是<code>NavLink</code>可定制化能力都比较差，无法实现“点击按钮后跳转路由”这样的需求，那么我们就需要通过编程式导航，使用JS来完成路由的跳转</p><p>ReactRouter提供了编程式导航的API：<code>useNavigate</code></p><p>自ReactRouter6起，编程式导航的API不再支持ClassComponent，全面拥抱Hooks。</p><p>我们将在后续的学习中开启Hooks的写法，那么目前如何在类组件中也能使用Hooks呢？答案是高阶组件</p><p>封装一个高阶组件<code>withRouter</code>，经过高阶组件处理的类组件的props将会携带router对象，上面包含一些我们需要的属性和方法：</p><div class="vp-code-group"><div class="tabs"><input type="radio" name="group-vjdKQ" id="tab-ea4TfoX" checked="checked"><label for="tab-ea4TfoX">withRouter.js</label><input type="radio" name="group-vjdKQ" id="tab-RaM1wk9"><label for="tab-RaM1wk9">Home.jsx</label></div><div class="blocks"><div class="language-tsx active line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// withRouter.js</span></span>
|
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useNavigate</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
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<span class="line"></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">function</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">withRouter</span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">WrapperComponent</span><span style="color:#89DDFF;">)</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">props</span><span style="color:#89DDFF;">)</span><span style="color:#F07178;"> </span><span style="color:#C792EA;">=></span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">navigate</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#82AAFF;">useNavigate</span><span style="color:#F07178;">()</span></span>
|
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<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">router</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">navigate</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">WrapperComponent</span><span style="color:#89DDFF;"> {...</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">} </span><span style="color:#C792EA;">router</span><span style="color:#89DDFF;">={</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">} /></span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// Home.jsx</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">PureComponent</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Outlet</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">withRouter</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../hoc/withRouter</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">withRouter</span><span style="color:#A6ACCD;">(</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">class</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">Home</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">extends</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">PureComponent</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">render</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">Home</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">button</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">onClick</span><span style="color:#89DDFF;">={()</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">this.</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">navigate</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/home/ranking</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span><span style="color:#A6ACCD;">Ranking</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">button</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">button</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">onClick</span><span style="color:#89DDFF;">={()</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">this.</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">navigate</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/home/recommand</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span><span style="color:#A6ACCD;">Recommand</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">button</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Outlet</span><span style="color:#89DDFF;">></</span><span style="color:#FFCB6B;">Outlet</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">)</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br></div></div></div></div><p>我们使用<code>withRouter</code>高阶组件对Home组件进行了增强，可以通过编程式导航来实现二级路由跳转</p><p>这里只是展示了编程式导航的用法和高阶组件的能力，目前还是尽可能使用Hooks写法编写新项目</p><h2 id="动态路由-路由传参" tabindex="-1">动态路由（路由传参） <a class="header-anchor" href="#动态路由-路由传参" aria-label="Permalink to "动态路由（路由传参）""></a></h2><p>传递参数由两种方式：</p><ul><li>动态路由的方式</li><li>查询字符串传递参数</li></ul><p>动态路由是指：路由中的<strong>路径</strong>信息并不会固定</p><ul><li>比如匹配规则为<code>/detail/:id</code>时，<code>/detail/123</code> <code>detail/888</code>都会被匹配上，并将<code>123/888</code>作为id参数传递</li><li>其中<code>/detail/:id</code>这个匹配规则被称为动态路由</li></ul><p>动态路由常见于嵌套路由跳转，比如：从歌曲列表页面点击后跳转到歌曲详情页，可以通过路由传递歌曲的ID，访问到不同歌曲的详情页</p><p>我们在之前的HomeRanking榜单中加入列表和点击跳转功能，并编写一个新的组件Detail来接收来自路由的参数</p><p>同样地，<code>react-router-dom</code>为我们提供了从路由获取参数的API：<code>useParams</code>，它是一个Hooks，我们将它应用到之前编写的高级组件<code>withRouter</code>中</p><ul><li>在使用了<code>withRouter</code>的组件中，就可以通过<code>this.props.router.params.xxx</code>获取到当前路由中传递的参数</li><li>使用动态匹配路由时，传递给Route组件的<code>path</code>属性为<code>:xxx</code>，这里是<code>/detail/:id</code></li></ul><div class="vp-code-group"><div class="tabs"><input type="radio" name="group-UtvTo" id="tab-8Ysyxz7" checked="checked"><label for="tab-8Ysyxz7">withRouter.js</label><input type="radio" name="group-UtvTo" id="tab-yZF4Rx7"><label for="tab-yZF4Rx7">HomeRanking.jsx</label><input type="radio" name="group-UtvTo" id="tab-2iNKPCE"><label for="tab-2iNKPCE">Detail.jsx</label></div><div class="blocks"><div class="language-tsx active line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// withRouter.js</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useNavigate</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useParams</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">function</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">withRouter</span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">WrapperComponent</span><span style="color:#89DDFF;">)</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">props</span><span style="color:#89DDFF;">)</span><span style="color:#F07178;"> </span><span style="color:#C792EA;">=></span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">navigate</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#82AAFF;">useNavigate</span><span style="color:#F07178;">()</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">params</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#82AAFF;">useParams</span><span style="color:#F07178;">()</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">router</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">navigate</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">params</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">WrapperComponent</span><span style="color:#89DDFF;"> {...</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">} </span><span style="color:#C792EA;">router</span><span style="color:#89DDFF;">={</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">} /></span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br></div></div><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// HomeRanking.jsx</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">PureComponent</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">withRouter</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../hoc/withRouter</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">withRouter</span><span style="color:#A6ACCD;">(</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">class</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">HomeRanking</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">extends</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">PureComponent</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">render</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">list</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Array</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">from</span><span style="color:#F07178;">(</span><span style="color:#82AAFF;">Array</span><span style="color:#F07178;">(</span><span style="color:#F78C6C;">10</span><span style="color:#F07178;">)</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">x</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;font-style:italic;">i</span><span style="color:#89DDFF;">)</span><span style="color:#F07178;"> </span><span style="color:#C792EA;">=></span><span style="color:#F07178;"> (</span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> id</span><span style="color:#89DDFF;">:</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">++</span><span style="color:#A6ACCD;">i</span><span style="color:#89DDFF;">,</span></span>
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<span class="line"><span style="color:#F07178;"> name</span><span style="color:#89DDFF;">:</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">`</span><span style="color:#C3E88D;">Music </span><span style="color:#89DDFF;">${</span><span style="color:#A6ACCD;">i</span><span style="color:#89DDFF;">}`</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#F07178;">))</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">HomeRanking</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">ul</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#A6ACCD;">list</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">map</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">item</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#A6ACCD;font-style:italic;">index</span><span style="color:#89DDFF;">)</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> (</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">li</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">key</span><span style="color:#89DDFF;">={</span><span style="color:#A6ACCD;">index</span><span style="color:#89DDFF;">} </span><span style="color:#C792EA;">onClick</span><span style="color:#89DDFF;">={()</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">this.</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">navigate</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">`</span><span style="color:#C3E88D;">/detail/</span><span style="color:#89DDFF;">${</span><span style="color:#A6ACCD;">item</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">id</span><span style="color:#89DDFF;">}`</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#A6ACCD;">item</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">name</span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">li</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> ))</span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">ul</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">)</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br></div></div><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// Detail.jsx</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">PureComponent</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">withRouter</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../hoc/withRouter</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">withRouter</span><span style="color:#A6ACCD;">(</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">class</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">Detail</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">extends</span><span style="color:#A6ACCD;"> </span><span style="color:#FFCB6B;">PureComponent</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">render</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">Detail</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> Current Music ID: </span><span style="color:#89DDFF;">{this.</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">params</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">id</span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">)</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br></div></div></div></div><h2 id="查询字符串的参数" tabindex="-1">查询字符串的参数 <a class="header-anchor" href="#查询字符串的参数" aria-label="Permalink to "查询字符串的参数""></a></h2><p>之前传递的是路径参数，那么查询字符串参数应该如何获取？</p><p>可以通过<code>useLocation</code>这个Hooks拿到当前地址详细信息：</p><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> location </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">useLocation</span><span style="color:#A6ACCD;">()</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">location</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">search </span><span style="color:#676E95;font-style:italic;">// ?name=ziu&age=18</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>需要自行完成数据的解析，不太方便</p><p>还有一个Hooks：<code>useSearchParams</code>，可以在获取到查询字符串信息的同时帮我们解析成<code>URLSearchParams</code>对象</p><p>要从<code>URLSearchParams</code>类型的对象中取值，需要通过标准方法<code>get</code></p><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">[</span><span style="color:#A6ACCD;"> searchParams</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> setSearchParams </span><span style="color:#89DDFF;">]</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">useSearchParams</span><span style="color:#A6ACCD;">()</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">searchParams</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">get</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">name</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">) </span><span style="color:#676E95;font-style:italic;">// 'ziu'</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">searchParams</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">get</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">age</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">) </span><span style="color:#676E95;font-style:italic;">// 18</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>当然，我们在实际使用中也可以通过<code>Object.fromEntries</code>将它转为普通对象，这样我们使用<code>useSearchParams</code>来对之前编写的高阶组件<code>withRouter</code>做一次增强：</p><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight has-highlighted-lines"><code><span class="line"><span style="color:#676E95;font-style:italic;">// withRouter.js</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useNavigate</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useParams</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useSearchParams</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">function</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">withRouter</span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">WrapperComponent</span><span style="color:#89DDFF;">)</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">props</span><span style="color:#89DDFF;">)</span><span style="color:#F07178;"> </span><span style="color:#C792EA;">=></span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">navigate</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#82AAFF;">useNavigate</span><span style="color:#F07178;">()</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">params</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#82AAFF;">useParams</span><span style="color:#F07178;">()</span></span>
|
||
<span class="line highlighted"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">[</span><span style="color:#A6ACCD;">searchParams</span><span style="color:#89DDFF;">]</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#82AAFF;">useSearchParams</span><span style="color:#F07178;">()</span></span>
|
||
<span class="line highlighted"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">query</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Object</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">fromEntries</span><span style="color:#F07178;">(</span><span style="color:#A6ACCD;">searchParams</span><span style="color:#F07178;">)</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#C792EA;">const</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">router</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">navigate</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">params</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">query</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">WrapperComponent</span><span style="color:#89DDFF;"> {...</span><span style="color:#A6ACCD;">props</span><span style="color:#89DDFF;">} </span><span style="color:#C792EA;">router</span><span style="color:#89DDFF;">={</span><span style="color:#A6ACCD;">router</span><span style="color:#89DDFF;">} /></span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div><div class="tip custom-block"><p class="custom-block-title">TIP</p><p>需要注意的是，这里的<code>useSearchParams</code>是一个Hooks的常见形态</p><p>它返回一个数组，数组的首位为值，数组的次位为改变值的方法</p><p>与对象解构不同的是，数组结构是对位解构：保证位置一致则值一致，命名随意</p><p>而对象解构恰恰相反，不必保证位置，而需要保证命名一致</p></div><h2 id="路由的配置方式" tabindex="-1">路由的配置方式 <a class="header-anchor" href="#路由的配置方式" aria-label="Permalink to "路由的配置方式""></a></h2><p>至此为止，路由的配置是耦合在<code>App.jsx</code>中的，我们可以将Routes这部分代码抽离出单独的组件，也可以通过配置的方式来完成路由映射关系的编写</p><ul><li>在ReactRouter5版本中，我们可以将路由的映射规则写为JS对象，需要引入第三方库<code>react-router-config</code></li><li>在ReactRouter6版本中，允许我们将其写为配置文件，不需要安装其他内容</li></ul><p>6版本为我们提供了一个API：<code>useRoutes</code>，将我们编写的配置文件传入此函数，可以将其转化为之前编写的组件结构，本质上也是一种语法糖</p><p>需要注意的是，Hooks只能在函数式组件中使用，这里我们将App组件改用FunctionComponent书写了</p><div class="vp-code-group"><div class="tabs"><input type="radio" name="group-i3FoZ" id="tab-i60VYDG" checked="checked"><label for="tab-i60VYDG">index.js</label><input type="radio" name="group-i3FoZ" id="tab-yrEUU9T"><label for="tab-yrEUU9T">App.jsx</label></div><div class="blocks"><div class="language-tsx active line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// router/index.js</span></span>
|
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Navigate</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> Home </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/Home</span><span style="color:#89DDFF;">'</span></span>
|
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> HomeRanking </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/HomeRanking</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> HomeRecommand </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/HomeRecommand</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> About </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/About</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> Detail </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/Detail</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> NotFound </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/NotFound</span><span style="color:#89DDFF;">'</span></span>
|
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<span class="line"></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> routes </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> [</span></span>
|
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<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Navigate</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Home</span><span style="color:#89DDFF;"> />,</span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">children</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> [</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">''</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Navigate</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home/ranking</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> /></span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">ranking</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">HomeRanking</span><span style="color:#89DDFF;"> /></span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">recommand</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">HomeRecommand</span><span style="color:#89DDFF;"> /></span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span></span>
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||
<span class="line"><span style="color:#A6ACCD;"> ]</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/about</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">About</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/detail/:id</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Detail</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">*</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">NotFound</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">]</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br></div></div><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">NavLink</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">useRoutes</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">routes</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./router</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">default</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">function</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">App</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> (</span></span>
|
||
<span class="line"><span style="color:#F07178;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#F07178;">h1</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">App</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">h1</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">className</span><span style="color:#89DDFF;">={({</span><span style="color:#A6ACCD;"> </span><span style="color:#A6ACCD;font-style:italic;">isActive</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">})</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> (isActive </span><span style="color:#89DDFF;">?</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">link-active</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">''</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> Home</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">to</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">"</span><span style="color:#C3E88D;">/about</span><span style="color:#89DDFF;">"</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">style</span><span style="color:#89DDFF;">={({</span><span style="color:#A6ACCD;"> </span><span style="color:#A6ACCD;font-style:italic;">isActive</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">})</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> (</span><span style="color:#89DDFF;">{</span><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">color</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> isActive </span><span style="color:#89DDFF;">?</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">red</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">''</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> About</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">NavLink</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#82AAFF;">useRoutes</span><span style="color:#A6ACCD;">(routes)</span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">div</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#F07178;"> )</span></span>
|
||
<span class="line"><span style="color:#89DDFF;">}</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br></div></div></div></div><h2 id="懒加载" tabindex="-1">懒加载 <a class="header-anchor" href="#懒加载" aria-label="Permalink to "懒加载""></a></h2><p>针对某些场景的首屏优化，我们可以根据路由对代码进行分包，只有需要访问到某些页面时才从服务器请求对应的JS代码块</p><p>可以使用<code>React.lazy(() => import( ... ))</code>对某些代码进行懒加载</p><p>结合之前使用到的配置式路由映射规则，我们使用懒加载对代码进行分包</p><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight has-highlighted-lines"><code><span class="line"><span style="color:#676E95;font-style:italic;">// router/index.js</span></span>
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<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">lazy</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
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<span class="line"><span style="color:#676E95;font-style:italic;">// import HomeRecommand from '../views/HomeRecommand'</span></span>
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<span class="line"><span style="color:#676E95;font-style:italic;">// import About from '../views/About'</span></span>
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<span class="line"></span>
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||
<span class="line highlighted"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> HomeRecommand </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">lazy</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">import</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/HomeRecommand</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">))</span></span>
|
||
<span class="line highlighted"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> About </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">lazy</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">()</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=></span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">import</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">../views/About</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">))</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">export</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> routes </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> [</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">...</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/home</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
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<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Home</span><span style="color:#89DDFF;"> />,</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">children</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> [</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">...</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">recommand</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line highlighted"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">HomeRecommand</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">}</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> ]</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">path</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">/about</span><span style="color:#89DDFF;">'</span><span style="color:#89DDFF;">,</span></span>
|
||
<span class="line highlighted"><span style="color:#A6ACCD;"> </span><span style="color:#F07178;">element</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">About</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">},</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">...</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">]</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br></div></div><p>这时在终端执行<code>pnpm build</code>可以发现，构建产物为我们执行了分包，<code>About</code>和<code>HomeRecommand</code>这两个次级页面被打进了两个单独的包中</p><blockquote><p>在Vue中默认为我们完成了代码分包，第三方包的代码都被打包到了<code>vendors</code>中，业务代码放到了单独的JS文件中</p></blockquote><blockquote><p>只有当我们访问到这些页面时，才会发起网络请求，请求这些次级页面的JS代码</p></blockquote><p>然而如果你在react-app的构建产物<code>index.html</code>开启本地预览服务器，会发现切换到对应页面后项目会crash（本地开发也会crash）</p><div class="language-bash line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">bash</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;"># 使用 serve 开启本地预览服务器</span></span>
|
||
<span class="line"><span style="color:#FFCB6B;">pnpm</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">add</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">serve</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">-g</span></span>
|
||
<span class="line"><span style="color:#FFCB6B;">serve</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">-s</span><span style="color:#A6ACCD;"> </span><span style="color:#C3E88D;">build</span><span style="color:#A6ACCD;"> </span><span style="color:#676E95;font-style:italic;"># 将 build 作为根目录</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>这是因为React默认没有为异步组件做额外处理，我们需要使用<code>Suspense</code>组件来额外处理懒加载的组件</p><div class="language-tsx line-numbers-mode"><button title="Copy Code" class="copy"></button><span class="lang">tsx</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#676E95;font-style:italic;">// index.js</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> React</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">StrictMode</span><span style="color:#89DDFF;">,</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">Suspense</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> ReactDOM </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-dom/client</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> App </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">./App</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"><span style="color:#89DDFF;font-style:italic;">import</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">HashRouter</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">from</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">react-router-dom</span><span style="color:#89DDFF;">'</span></span>
|
||
<span class="line"></span>
|
||
<span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> root </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> ReactDOM</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">createRoot</span><span style="color:#A6ACCD;">(document</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">getElementById</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">'</span><span style="color:#C3E88D;">root</span><span style="color:#89DDFF;">'</span><span style="color:#A6ACCD;">))</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">root</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">render</span><span style="color:#A6ACCD;">(</span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">StrictMode</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">HashRouter</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">Suspense</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">fallback</span><span style="color:#89DDFF;">={<</span><span style="color:#F07178;">h2</span><span style="color:#89DDFF;">></span><span style="color:#A6ACCD;">Loading...</span><span style="color:#89DDFF;"></</span><span style="color:#F07178;">h2</span><span style="color:#89DDFF;">>}></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"><</span><span style="color:#FFCB6B;">App</span><span style="color:#89DDFF;"> /></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">Suspense</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">HashRouter</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;"></</span><span style="color:#FFCB6B;">StrictMode</span><span style="color:#89DDFF;">></span></span>
|
||
<span class="line"><span style="color:#A6ACCD;">)</span></span></code></pre><div class="line-numbers-wrapper" aria-hidden="true"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br></div></div><p>当根组件内部有组件处于异步加载状态时，都会在页面上展示<code>Loading...</code>而不是崩溃掉</p></div></div></main><footer class="VPDocFooter" data-v-f0e11dcf data-v-bdb4c5a7><!--[--><!--]--><div class="edit-info" data-v-bdb4c5a7><div class="edit-link" data-v-bdb4c5a7><a class="VPLink link vp-external-link-icon no-icon edit-link-button" href="https://github.com/ZiuChen/ZiuChen.github.io/edit/main/docs/note/React Router.md" target="_blank" rel="noreferrer" data-v-bdb4c5a7><!--[--><svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 24 24" class="edit-link-icon" aria-label="edit icon" data-v-bdb4c5a7><path d="M18,23H4c-1.7,0-3-1.3-3-3V6c0-1.7,1.3-3,3-3h7c0.6,0,1,0.4,1,1s-0.4,1-1,1H4C3.4,5,3,5.4,3,6v14c0,0.6,0.4,1,1,1h14c0.6,0,1-0.4,1-1v-7c0-0.6,0.4-1,1-1s1,0.4,1,1v7C21,21.7,19.7,23,18,23z"></path><path d="M8,17c-0.3,0-0.5-0.1-0.7-0.3C7,16.5,6.9,16.1,7,15.8l1-4c0-0.2,0.1-0.3,0.3-0.5l9.5-9.5c1.2-1.2,3.2-1.2,4.4,0c1.2,1.2,1.2,3.2,0,4.4l-9.5,9.5c-0.1,0.1-0.3,0.2-0.5,0.3l-4,1C8.2,17,8.1,17,8,17zM9.9,12.5l-0.5,2.1l2.1-0.5l9.3-9.3c0.4-0.4,0.4-1.1,0-1.6c-0.4-0.4-1.2-0.4-1.6,0l0,0L9.9,12.5z M18.5,2.5L18.5,2.5L18.5,2.5z"></path></svg> Edit this page on GitHub<!--]--></a></div><div class="last-updated" data-v-bdb4c5a7><p class="VPLastUpdated" data-v-bdb4c5a7 data-v-4e6de435>Updated Date: <time datetime="2023-10-11T16:47:02.000Z" data-v-4e6de435></time></p></div></div><nav class="prev-next" data-v-bdb4c5a7><div class="pager" data-v-bdb4c5a7><a class="pager-link prev" href="/note/Redux.html" data-v-bdb4c5a7><span class="desc" data-v-bdb4c5a7>Previous page</span><span class="title" data-v-bdb4c5a7>Redux</span></a></div><div class="pager" data-v-bdb4c5a7><a class="pager-link next" href="/note/MySQL.html" data-v-bdb4c5a7><span class="desc" data-v-bdb4c5a7>Next page</span><span class="title" data-v-bdb4c5a7>MySQL</span></a></div></nav></footer><!--[--><!--]--></div></div></div><!--[--><!--]--></div></div><footer class="VPFooter has-sidebar" data-v-4b282efc data-v-a21bf57e><div class="container" data-v-a21bf57e><p class="message" data-v-a21bf57e>Released under the MIT License.</p><p class="copyright" data-v-a21bf57e>Copyright © 2019-present Ziu Chen</p></div></footer><!--[--><!--]--></div></div>
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