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  25.     <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>初识 TypeScript</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>TypeScript 常用语法</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 项目初始化</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 基础功能实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 异常情况处理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 接口扩展</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 拦截器实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 配置化实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 取消功能实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>ts-axios 更多功能实现</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/blog/pages/5dce43eba796a2ab/" class="sidebar-link">withCredentials</a></li><li><a href="/blog/pages/390cb70e2b619449/" class="sidebar-link">XSRF 防御</a></li><li><a href="/blog/pages/1376fd897809036e/" class="sidebar-link">上传和下载的进度监控</a></li><li><a href="/blog/pages/89cd6496c23159ae/" class="sidebar-link">HTTP 授权</a></li><li><a href="/blog/pages/40b41ce8e8159567/" class="sidebar-link">自定义合法状态码</a></li><li><a href="/blog/pages/7753b8141663e54a/" class="sidebar-link">自定义参数序列化</a></li><li><a href="/blog/pages/0b9f2ee2b4dbb728/" class="sidebar-link">baseURL</a></li><li><a href="/blog/pages/c26b053540a7dafa/" aria-current="page" class="active sidebar-link">静态方法扩展</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level2"><a href="/blog/pages/c26b053540a7dafa/#需求分析" class="sidebar-link">需求分析</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/c26b053540a7dafa/#代码实现" class="sidebar-link">代码实现</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/c26b053540a7dafa/#demo-编写" class="sidebar-link">demo 编写</a></li></ul></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 单元测试</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 部署与发布</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <div><main class="page"><div class="theme-vdoing-wrapper "><div class="articleInfo-wrap" data-v-06970110><div class="articleInfo" data-v-06970110><ul class="breadcrumbs" data-v-06970110><li data-v-06970110><a href="/blog/" title="首页" class="iconfont icon-home router-link-active" data-v-06970110></a></li> <li data-v-06970110><a href="/blog/note/typescript-axios/#《TypeScript 从零实现 axios》" data-v-06970110>《TypeScript 从零实现 axios》</a></li><li data-v-06970110><a href="/blog/note/typescript-axios/#ts-axios 更多功能实现" data-v-06970110>ts-axios 更多功能实现</a></li></ul> <div class="info" data-v-06970110><div title="作者" class="author iconfont icon-touxiang" data-v-06970110><a href="javascript:;" data-v-06970110>HuangYi</a></div> <div title="创建时间" class="date iconfont icon-riqi" data-v-06970110><a href="javascript:;" data-v-06970110>2020-01-05</a></div> <!----></div></div></div> <!----> <div class="content-wrapper"><div class="right-menu-wrapper"><div class="right-menu-margin"><div class="right-menu-title">目录</div> <div class="right-menu-content"></div></div></div> <h1><img src="data:image/png;base64,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">静态方法扩展<!----></h1>  <div class="theme-vdoing-content content__default"><h1 id="静态方法扩展"><a href="#静态方法扩展" class="header-anchor">#</a> 静态方法扩展</h1> <h2 id="需求分析"><a href="#需求分析" class="header-anchor">#</a> 需求分析</h2> <p>官方 axios 库实现了 <code>axios.all</code>、<code>axios.spread</code> 等方法，它们的用法如下：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">function</span> <span class="token function">getUserAccount</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    26. 

  26.   <span class="token keyword">return</span> axios<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'/user/12345'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    27. 

  27. <span class="token punctuation">}</span>
    28. 

  28. 

  29. <span class="token keyword">function</span> <span class="token function">getUserPermissions</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    30. 

  30.   <span class="token keyword">return</span> axios<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'/user/12345/permissions'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    31. 

  31. <span class="token punctuation">}</span>
    32. 

  32. 

  33. axios<span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token function">getUserAccount</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">getUserPermissions</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">)</span>
    34. 

  34.   <span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span><span class="token function">spread</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span>acct<span class="token punctuation">,</span> perms<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    35. 

  35.     <span class="token comment">// Both requests are now complete</span>
    36. 

  36.   <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    37. 

  37. </code></pre> <div class="line-numbers-wrapper"><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></div></div><p>实际上，<code>axios.all</code> 就是 <code>Promise.all</code> 的封装，它返回的是一个 <code>Promise</code> 数组，<code>then</code> 函数的参数本应是一个参数为 <code>Promise resolves</code>（数组）的函数，在这里使用了 <code>axios.spread</code> 方法。所以 <code>axios.spread</code> 方法是接收一个函数，返回一个新的函数，新函数的结构满足 <code>then</code> 函数的参数结构。</p> <p>个人认为 <code>axios</code> 这俩静态方法在目前看来很鸡肋，因为使用 <code>Promise</code> 一样可以完成这俩需求。</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">function</span> <span class="token function">getUserAccount</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    38. 

  38.   <span class="token keyword">return</span> axios<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'/user/12345'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    39. 

  39. <span class="token punctuation">}</span>
    40. 

  40. 

  41. <span class="token keyword">function</span> <span class="token function">getUserPermissions</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    42. 

  42.   <span class="token keyword">return</span> axios<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'/user/12345/permissions'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    43. 

  43. <span class="token punctuation">}</span>
    44. 

  44. 

  45. <span class="token builtin">Promise</span><span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token function">getUserAccount</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">getUserPermissions</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">)</span>
    46. 

  46.   <span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">[</span>acct<span class="token punctuation">,</span>perms<span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    47. 

  47.     <span class="token comment">// Both requests are now complete</span>
    48. 

  48.   <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    49. 

  49. </code></pre> <div class="line-numbers-wrapper"><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></div></div><p>在 <code>Promise.all</code> 的 <code>resolve</code> 函数中，我们可以直接通过数组的解构拿到每个请求对应的响应对象。</p> <p>但是为了保持与官网 axios API 一致，我们也在 <code>ts-axios</code> 库中实现这俩方法。</p> <p>官方 axios 库也通过 <code>axios.Axios</code> 对外暴露了 <code>Axios</code> 类(感觉也没有啥使用场景，但为了保持一致，我们也会实现)。</p> <p>另外对于 axios 实例，官网还提供了 <code>getUri</code> 方法在不发送请求的前提下根据传入的配置返回一个 url，如下：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">const</span> fakeConfig <span class="token operator">=</span> <span class="token punctuation">{</span>
    50. 

  50.   baseURL<span class="token operator">:</span> <span class="token string">'https://www.baidu.com/'</span><span class="token punctuation">,</span>
    51. 

  51.   url<span class="token operator">:</span> <span class="token string">'/user/12345'</span><span class="token punctuation">,</span>
    52. 

  52.   params<span class="token operator">:</span> <span class="token punctuation">{</span>
    53. 

  53.     idClient<span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
    54. 

  54.     idTest<span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
    55. 

  55.     testString<span class="token operator">:</span> <span class="token string">'thisIsATest'</span>
    56. 

  56.   <span class="token punctuation">}</span>
    57. 

  57. <span class="token punctuation">}</span>
    58. 

  58. <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span><span class="token function">getUri</span><span class="token punctuation">(</span>fakeConfig<span class="token punctuation">)</span><span class="token punctuation">)</span>
    59. 

  59. <span class="token comment">// https://www.baidu.com/user/12345?idClient=1&amp;idTest=2&amp;testString=thisIsATest</span>
    60. 

  60. </code></pre> <div class="line-numbers-wrapper"><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><h2 id="代码实现"><a href="#代码实现" class="header-anchor">#</a> 代码实现</h2> <p>首先修改类型定义。</p> <p><code>types/index.ts</code>：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">AxiosClassStatic</span> <span class="token punctuation">{</span>
    61. 

  61.   <span class="token keyword">new</span> <span class="token punctuation">(</span>config<span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> Axios
    62. 

  62. <span class="token punctuation">}</span>
    63. 

  63. 

  64. <span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">AxiosStatic</span> <span class="token keyword">extends</span> <span class="token class-name">AxiosInstance</span> <span class="token punctuation">{</span>
    65. 

  65.   <span class="token comment">// ...</span>
    66. 

  66. 

  67.   <span class="token generic-function"><span class="token function">all</span><span class="token generic class-name"><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span></span></span><span class="token punctuation">(</span>promises<span class="token operator">:</span> <span class="token builtin">Array</span><span class="token operator">&lt;</span><span class="token constant">T</span> <span class="token operator">|</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;&gt;</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span>
    68. 

  68. 

  69.   <span class="token generic-function"><span class="token function">spread</span><span class="token generic class-name"><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token punctuation">,</span> <span class="token constant">R</span><span class="token operator">&gt;</span></span></span><span class="token punctuation">(</span><span class="token function-variable function">callback</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token operator">:</span> <span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token constant">R</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token punctuation">(</span>arr<span class="token operator">:</span> <span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token constant">R</span>
    70. 

  70. 

  71.   Axios<span class="token operator">:</span> AxiosClassStatic
    72. 

  72. <span class="token punctuation">}</span>
    73. 

  73. 

  74. <span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">Axios</span> <span class="token punctuation">{</span>
    75. 

  75.   <span class="token comment">// ...</span>
    76. 

  76. 

  77.   <span class="token function">getUri</span><span class="token punctuation">(</span>config<span class="token operator">?</span><span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">string</span>
    78. 

  78. <span class="token punctuation">}</span>
    79. 

  79. </code></pre> <div class="line-numbers-wrapper"><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><p>然后我们去实现这几个静态方法。</p> <p><code>axios.ts</code>：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code>axios<span class="token punctuation">.</span><span class="token function-variable function">all</span> <span class="token operator">=</span> <span class="token keyword">function</span> <span class="token function">all</span><span class="token punctuation">(</span>promises<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    80. 

  80.   <span class="token keyword">return</span> <span class="token builtin">Promise</span><span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span>promises<span class="token punctuation">)</span>
    81. 

  81. <span class="token punctuation">}</span>
    82. 

  82. 

  83. axios<span class="token punctuation">.</span><span class="token function-variable function">spread</span> <span class="token operator">=</span> <span class="token keyword">function</span> <span class="token function">spread</span><span class="token punctuation">(</span>callback<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    84. 

  84.   <span class="token keyword">return</span> <span class="token keyword">function</span> <span class="token function">wrap</span><span class="token punctuation">(</span>arr<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    85. 

  85.     <span class="token keyword">return</span> <span class="token function">callback</span><span class="token punctuation">.</span><span class="token function">apply</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> arr<span class="token punctuation">)</span>
    86. 

  86.   <span class="token punctuation">}</span>
    87. 

  87. <span class="token punctuation">}</span>
    88. 

  88. 

  89. axios<span class="token punctuation">.</span>Axios <span class="token operator">=</span> Axios
    90. 

  90. </code></pre> <div class="line-numbers-wrapper"><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><p>最后我们去给 Axios 添加实例方法 <code>getUri</code>。</p> <p><code>core/Axios.ts</code>：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token function">getUri</span><span class="token punctuation">(</span>config<span class="token operator">?</span><span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">string</span> <span class="token punctuation">{</span>
    91. 

  91.   config <span class="token operator">=</span> <span class="token function">mergeConfig</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>defaults<span class="token punctuation">,</span> config<span class="token punctuation">)</span>
    92. 

  92.   <span class="token keyword">return</span> <span class="token function">transformURL</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span>
    93. 

  93. <span class="token punctuation">}</span>
    94. 

  94. </code></pre> <div class="line-numbers-wrapper"><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></div></div><p>先和默认配置合并，然后再通过 <code>dispatchRequest</code> 中实现的 <code>transformURL</code> 返回一个新的 <code>url</code>。</p> <h2 id="demo-编写"><a href="#demo-编写" class="header-anchor">#</a> demo 编写</h2> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">function</span> <span class="token function">getA</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    95. 

  95.   <span class="token keyword">return</span> axios<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'/more/A'</span><span class="token punctuation">)</span>
    96. 

  96. <span class="token punctuation">}</span>
    97. 

  97. 

  98. <span class="token keyword">function</span> <span class="token function">getB</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    99. 

  99.   <span class="token keyword">return</span> axios<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'/more/B'</span><span class="token punctuation">)</span>
    100. 

  100. <span class="token punctuation">}</span>
    101. 

  101. 

  102. axios<span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token function">getA</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">getB</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">)</span>
    103. 

  103.   <span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span><span class="token function">spread</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">(</span>resA<span class="token punctuation">,</span> resB<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    104. 

  104.     <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>resA<span class="token punctuation">.</span>data<span class="token punctuation">)</span>
    105. 

  105.     <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>resB<span class="token punctuation">.</span>data<span class="token punctuation">)</span>
    106. 

  106.   <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    107. 

  107. 

  108. 

  109. axios<span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token function">getA</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">getB</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">)</span>
    110. 

  110.   <span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">[</span>resA<span class="token punctuation">,</span> resB<span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
    111. 

  111.     <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>resA<span class="token punctuation">.</span>data<span class="token punctuation">)</span>
    112. 

  112.     <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>resB<span class="token punctuation">.</span>data<span class="token punctuation">)</span>
    113. 

  113.   <span class="token punctuation">}</span><span class="token punctuation">)</span>
    114. 

  114. 

  115. <span class="token keyword">const</span> fakeConfig <span class="token operator">=</span> <span class="token punctuation">{</span>
    116. 

  116.   baseURL<span class="token operator">:</span> <span class="token string">'https://www.baidu.com/'</span><span class="token punctuation">,</span>
    117. 

  117.   url<span class="token operator">:</span> <span class="token string">'/user/12345'</span><span class="token punctuation">,</span>
    118. 

  118.   params<span class="token operator">:</span> <span class="token punctuation">{</span>
    119. 

  119.     idClient<span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
    120. 

  120.     idTest<span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
    121. 

  121.     testString<span class="token operator">:</span> <span class="token string">'thisIsATest'</span>
    122. 

  122.   <span class="token punctuation">}</span>
    123. 

  123. <span class="token punctuation">}</span>
    124. 

  124. <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span><span class="token function">getUri</span><span class="token punctuation">(</span>fakeConfig<span class="token punctuation">)</span><span class="token punctuation">)</span>
    125. 

  125. </code></pre> <div class="line-numbers-wrapper"><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></div></div><p>这里我们通过 <code>axios.all</code> 同时发出了 2 个请求，返回了 <code>Promise</code> 数组，，我们可以在 <code>axios.spread</code> 的参数函数中拿到结果，也可以直接在 then 函数的参数函数中拿到结果。另外，我们可以根据 <code>axios.getUri</code> 方法在不发送请求的情况下根据配置得到最终请求的 url 结果。</p> <p>至此，<code>ts-axios</code> 就实现了官网 axios 库在浏览器端的所有需求。如果你学到了这里，先为自己鼓个掌吧，因为我们已经获得了阶段性的学习成果了。</p> <p>目前为止，我们对于所写代码的验证都是通过 demo 的方式，但是 demo 毕竟难以覆盖所有场景和代码分支，为了保证代码的正确性，我们还需要更科学的方式。从下一章开始，我们会学习编写单元测试，通过单元测试的方式来保证我们的代码正确性。</p></div></div>  <div class="page-edit"><div class="edit-link"><a href="https://github.com/heBody/blog/edit/master/docs/《TypeScript 从零实现 axios》/10.ts-axios 更多功能实现/08.静态方法扩展.md" target="_blank" rel="noopener noreferrer">编辑</a> <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></div> <div class="tags"><a href="/blog/tags/?tag=TypeScript" title="标签">#TypeScript</a></div> <div class="last-updated"><span class="prefix">上次更新:</span> <span class="time">2022/12/14, 19:36:42</span></div></div> <div class="page-nav-wapper"><div class="page-nav-centre-wrap"><a href="/blog/pages/0b9f2ee2b4dbb728/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">baseURL</div></a> <a href="/blog/pages/df36888424843793/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">前言</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
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