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  19.   <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></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="前端" class="dropdown-title"><a href="/blog/web/" class="link-title">前端</a> <span class="title" style="display:none;">前端</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><h4>前端文章</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/blog/pages/8143cc480faf9a11/" class="nav-link">JavaScript</a></li></ul></li><li class="dropdown-item"><h4>学习笔记</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/blog/note/javascript/" class="nav-link">《JavaScript教程》</a></li><li class="dropdown-subitem"><a href="/blog/note/js/" class="nav-link">《JavaScript高级程序设计》</a></li><li class="dropdown-subitem"><a href="/blog/note/es6/" class="nav-link">《ES6 教程》</a></li><li class="dropdown-subitem"><a href="/blog/note/vue/" class="nav-link">《Vue》</a></li><li class="dropdown-subitem"><a href="/blog/note/react/" class="nav-link">《React》</a></li><li class="dropdown-subitem"><a href="/blog/note/typescript-axios/" class="nav-link">《TypeScript 从零实现 axios》</a></li><li class="dropdown-subitem"><a href="/blog/note/git/" class="nav-link">《Git》</a></li><li class="dropdown-subitem"><a href="/blog/pages/51afd6/" class="nav-link">TypeScript</a></li><li class="dropdown-subitem"><a href="/blog/pages/4643cd/" class="nav-link">JS设计模式总结</a></li></ul></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="页面" class="dropdown-title"><a href="/blog/ui/" class="link-title">页面</a> <span class="title" style="display:none;">页面</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/pages/8309a5b876fc95e3/" class="nav-link">HTML</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/0a83b083bdf257cb/" class="nav-link">CSS</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="技术" class="dropdown-title"><a href="/blog/technology/" class="link-title">技术</a> <span class="title" style="display:none;">技术</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/pages/9a7ee40fc232253e/" class="nav-link">技术文档</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/4c778760be26d8b3/" class="nav-link">GitHub技巧</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/117708e0af7f0bd9/" class="nav-link">Nodejs</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/41f87d890d0a02af/" class="nav-link">博客搭建</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="更多" class="dropdown-title"><a href="/blog/more/" class="link-title">更多</a> <span class="title" style="display:none;">更多</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/pages/f2a556/" class="nav-link">学习</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/aea6571b7a8bae86/" class="nav-link">面试</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/2d615df9a36a98ed/" class="nav-link">心情杂货</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/baaa02/" class="nav-link">实用技巧</a></li><li class="dropdown-item"><!----> <a href="/blog/friends/" class="nav-link">友情链接</a></li></ul></div></div><div class="nav-item"><a href="/blog/about/" class="nav-link">关于</a></div><div class="nav-item"><a href="/blog/pages/beb6c0bd8a66cea6/" class="nav-link">收藏</a></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="索引" class="dropdown-title"><a href="/blog/archives/" class="link-title">索引</a> <span class="title" style="display:none;">索引</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/categories/" class="nav-link">分类</a></li><li class="dropdown-item"><!----> <a href="/blog/tags/" class="nav-link">标签</a></li><li class="dropdown-item"><!----> <a href="/blog/archives/" class="nav-link">归档</a></li></ul></div></div> <a href="https://github.com/heBody/blog" target="_blank" rel="noopener noreferrer" class="repo-link">
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    22. 

  22.   个人游戏网站
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  23.   <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></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="前端" class="dropdown-title"><a href="/blog/web/" class="link-title">前端</a> <span class="title" style="display:none;">前端</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><h4>前端文章</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/blog/pages/8143cc480faf9a11/" class="nav-link">JavaScript</a></li></ul></li><li class="dropdown-item"><h4>学习笔记</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/blog/note/javascript/" class="nav-link">《JavaScript教程》</a></li><li class="dropdown-subitem"><a href="/blog/note/js/" class="nav-link">《JavaScript高级程序设计》</a></li><li class="dropdown-subitem"><a href="/blog/note/es6/" class="nav-link">《ES6 教程》</a></li><li class="dropdown-subitem"><a href="/blog/note/vue/" class="nav-link">《Vue》</a></li><li class="dropdown-subitem"><a href="/blog/note/react/" class="nav-link">《React》</a></li><li class="dropdown-subitem"><a href="/blog/note/typescript-axios/" class="nav-link">《TypeScript 从零实现 axios》</a></li><li class="dropdown-subitem"><a href="/blog/note/git/" class="nav-link">《Git》</a></li><li class="dropdown-subitem"><a href="/blog/pages/51afd6/" class="nav-link">TypeScript</a></li><li class="dropdown-subitem"><a href="/blog/pages/4643cd/" class="nav-link">JS设计模式总结</a></li></ul></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="页面" class="dropdown-title"><a href="/blog/ui/" class="link-title">页面</a> <span class="title" style="display:none;">页面</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/pages/8309a5b876fc95e3/" class="nav-link">HTML</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/0a83b083bdf257cb/" class="nav-link">CSS</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="技术" class="dropdown-title"><a href="/blog/technology/" class="link-title">技术</a> <span class="title" style="display:none;">技术</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/pages/9a7ee40fc232253e/" class="nav-link">技术文档</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/4c778760be26d8b3/" class="nav-link">GitHub技巧</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/117708e0af7f0bd9/" class="nav-link">Nodejs</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/41f87d890d0a02af/" class="nav-link">博客搭建</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="更多" class="dropdown-title"><a href="/blog/more/" class="link-title">更多</a> <span class="title" style="display:none;">更多</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/pages/f2a556/" class="nav-link">学习</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/aea6571b7a8bae86/" class="nav-link">面试</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/2d615df9a36a98ed/" class="nav-link">心情杂货</a></li><li class="dropdown-item"><!----> <a href="/blog/pages/baaa02/" class="nav-link">实用技巧</a></li><li class="dropdown-item"><!----> <a href="/blog/friends/" class="nav-link">友情链接</a></li></ul></div></div><div class="nav-item"><a href="/blog/about/" class="nav-link">关于</a></div><div class="nav-item"><a href="/blog/pages/beb6c0bd8a66cea6/" class="nav-link">收藏</a></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="索引" class="dropdown-title"><a href="/blog/archives/" class="link-title">索引</a> <span class="title" style="display:none;">索引</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/blog/categories/" class="nav-link">分类</a></li><li class="dropdown-item"><!----> <a href="/blog/tags/" class="nav-link">标签</a></li><li class="dropdown-item"><!----> <a href="/blog/archives/" class="nav-link">归档</a></li></ul></div></div> <a href="https://github.com/heBody/blog" target="_blank" rel="noopener noreferrer" class="repo-link">
    24. 

  24.     GitHub
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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>基础</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>组件</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>过渡&amp;动画</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>可复用性&amp;组合</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/blog/pages/bd36a3c1bc3e0821/" aria-current="page" class="active sidebar-link">Mixin混入</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level2"><a href="/blog/pages/bd36a3c1bc3e0821/#基础" class="sidebar-link">基础</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/bd36a3c1bc3e0821/#选项合并" class="sidebar-link">选项合并</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/bd36a3c1bc3e0821/#某项目中使用的mixin示例" class="sidebar-link">某项目中使用的Mixin示例</a></li></ul></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>规模化</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Vuex</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>其他</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/vue/#《Vue》笔记" data-v-06970110>《Vue》笔记</a></li><li data-v-06970110><a href="/blog/note/vue/#可复用性&amp;组合" data-v-06970110>可复用性&amp;组合</a></li></ul> <div class="info" data-v-06970110><div title="作者" class="author iconfont 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src="data:image/png;base64,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">Mixin混入<!----></h1>  <div class="theme-vdoing-content content__default"><h1 id="mixin混入"><a href="#mixin混入" class="header-anchor">#</a> Mixin混入</h1> <h2 id="基础"><a href="#基础" class="header-anchor">#</a> 基础</h2> <p>混入 (mixin) 提供了一种非常灵活的方式，来分发 Vue 组件中的可复用功能。一个混入对象可以包含任意组件选项。当组件使用混入对象时，所有混入对象的选项将被“混合”进入该组件本身的选项。
    26. 

  26. </p> <blockquote><p>组件选项：指的是组件对象中的 <code>data</code>、<code>created</code>、<code>methods</code> 等等选项。</p> <p>可通过 <code>this.$options</code> 查看选项</p></blockquote> <p>例子：</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// 定义一个混入对象</span>
    27. 

  27. <span class="token keyword">var</span> myMixin <span class="token operator">=</span> <span class="token punctuation">{</span>
    28. 

  28.   <span class="token function-variable function">created</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    29. 

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

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

  31.   <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    32. 

  32.     <span class="token function-variable function">hello</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    33. 

  33.       console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'hello from mixin!'</span><span class="token punctuation">)</span>
    34. 

  34.     <span class="token punctuation">}</span>
    35. 

  35.   <span class="token punctuation">}</span>
    36. 

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

  37. 

  38. <span class="token comment">// 定义一个使用混入对象的组件</span>
    39. 

  39. <span class="token keyword">var</span> Component <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    40. 

  40.   <span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>myMixin<span class="token punctuation">]</span>
    41. 

  41. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    42. 

  42. 

  43. <span class="token keyword">var</span> component <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Component</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">// =&gt; &quot;hello from mixin!&quot;</span>
    44. 

  44. </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></div></div><p><strong>通俗讲，就是把组件的部分代码抽离出来，再&quot;混合&quot;进入组件。当多个组件有相同的选项代码时，可以把相同的选项代码抽离到一个文件，再混入到每个组件，从而达到共享部分代码的目的。</strong></p> <h2 id="选项合并"><a href="#选项合并" class="header-anchor">#</a> 选项合并</h2> <p>当组件和混入对象含有同名选项时，这些选项将以恰当的方式进行“合并”。</p> <p>比如，数据对象在内部会进行递归合并，并<strong>在发生冲突时以组件数据优先</strong>。</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">var</span> mixin <span class="token operator">=</span> <span class="token punctuation">{</span>
    45. 

  45.   <span class="token function-variable function">data</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    46. 

  46.     <span class="token keyword">return</span> <span class="token punctuation">{</span>
    47. 

  47.       <span class="token literal-property property">message</span><span class="token operator">:</span> <span class="token string">'hello'</span><span class="token punctuation">,</span>
    48. 

  48.       <span class="token literal-property property">foo</span><span class="token operator">:</span> <span class="token string">'abc'</span>
    49. 

  49.     <span class="token punctuation">}</span>
    50. 

  50.   <span class="token punctuation">}</span>
    51. 

  51. <span class="token punctuation">}</span>
    52. 

  52. 

  53. <span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    54. 

  54.   <span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>mixin<span class="token punctuation">]</span><span class="token punctuation">,</span>
    55. 

  55.   <span class="token function-variable function">data</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    56. 

  56.     <span class="token keyword">return</span> <span class="token punctuation">{</span>
    57. 

  57.       <span class="token literal-property property">message</span><span class="token operator">:</span> <span class="token string">'goodbye'</span><span class="token punctuation">,</span>
    58. 

  58.       <span class="token literal-property property">bar</span><span class="token operator">:</span> <span class="token string">'def'</span>
    59. 

  59.     <span class="token punctuation">}</span>
    60. 

  60.   <span class="token punctuation">}</span><span class="token punctuation">,</span>
    61. 

  61.   <span class="token function-variable function">created</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    62. 

  62.     console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>$data<span class="token punctuation">)</span>
    63. 

  63.     <span class="token comment">// =&gt; { message: &quot;goodbye&quot;, foo: &quot;abc&quot;, bar: &quot;def&quot; }</span>
    64. 

  64.     <span class="token comment">// message同名，组件数据优先，而foo被混入</span>
    65. 

  65.   <span class="token punctuation">}</span>
    66. 

  66. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    67. 

  67. </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></div></div><p><strong>同名钩子函数将合并为一个数组，因此都将被调用</strong>。另外，混入对象的钩子将在组件自身钩子<strong>之前</strong>调用。</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">var</span> mixin <span class="token operator">=</span> <span class="token punctuation">{</span>
    68. 

  68.   <span class="token function-variable function">created</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    69. 

  69.     console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'混入对象的钩子被调用'</span><span class="token punctuation">)</span>
    70. 

  70.   <span class="token punctuation">}</span>
    71. 

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

  72. 

  73. <span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    74. 

  74.   <span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>mixin<span class="token punctuation">]</span><span class="token punctuation">,</span>
    75. 

  75.   <span class="token function-variable function">created</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    76. 

  76.     console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'组件钩子被调用'</span><span class="token punctuation">)</span>
    77. 

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

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

  79. 

  80. <span class="token comment">// =&gt; &quot;混入对象的钩子被调用&quot;</span>
    81. 

  81. <span class="token comment">// =&gt; &quot;组件钩子被调用&quot;</span>
    82. 

  82. </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></div></div><p>值为对象的选项，例如 <code>methods</code>、<code>components</code> 和 <code>directives</code>，将被合并为同一个对象。两个对象键名冲突时，取组件对象的键值对。</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">var</span> mixin <span class="token operator">=</span> <span class="token punctuation">{</span>
    83. 

  83.   <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    84. 

  84.     <span class="token function-variable function">foo</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    85. 

  85.       console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'foo'</span><span class="token punctuation">)</span>
    86. 

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

  87.     <span class="token function-variable function">conflicting</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    88. 

  88.       console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'from mixin'</span><span class="token punctuation">)</span>
    89. 

  89.     <span class="token punctuation">}</span>
    90. 

  90.   <span class="token punctuation">}</span>
    91. 

  91. <span class="token punctuation">}</span>
    92. 

  92. 

  93. <span class="token keyword">var</span> vm <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    94. 

  94.   <span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>mixin<span class="token punctuation">]</span><span class="token punctuation">,</span>
    95. 

  95.   <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    96. 

  96.     <span class="token function-variable function">bar</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    97. 

  97.       console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'bar'</span><span class="token punctuation">)</span>
    98. 

  98.     <span class="token punctuation">}</span><span class="token punctuation">,</span>
    99. 

  99.     <span class="token function-variable function">conflicting</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    100. 

  100.       console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'from self'</span><span class="token punctuation">)</span>
    101. 

  101.     <span class="token punctuation">}</span>
    102. 

  102.   <span class="token punctuation">}</span>
    103. 

  103. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    104. 

  104. 

  105. vm<span class="token punctuation">.</span><span class="token function">foo</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">// =&gt; &quot;foo&quot;</span>
    106. 

  106. vm<span class="token punctuation">.</span><span class="token function">bar</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">// =&gt; &quot;bar&quot;</span>
    107. 

  107. vm<span class="token punctuation">.</span><span class="token function">conflicting</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">// =&gt; &quot;from self&quot;</span>
    108. 

  108. </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></div></div><p>注意：<code>Vue.extend()</code> 也使用同样的策略进行合并。</p> <h2 id="某项目中使用的mixin示例"><a href="#某项目中使用的mixin示例" class="header-anchor">#</a> 某项目中使用的Mixin示例</h2> <p>抽离各组件相同的代码：</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// mixin.js</span>
    109. 

  109. <span class="token keyword">export</span> <span class="token keyword">const</span> playlistMixin <span class="token operator">=</span> <span class="token punctuation">{</span>
    110. 

  110.   <span class="token literal-property property">computed</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    111. 

  111.     <span class="token operator">...</span><span class="token function">mapGetters</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
    112. 

  112.       <span class="token string">'playlist'</span>
    113. 

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

  114.   <span class="token punctuation">}</span><span class="token punctuation">,</span>
    115. 

  115.   <span class="token function">mounted</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    116. 

  116.     <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">handlePlaylist</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>playlist<span class="token punctuation">)</span>
    117. 

  117.   <span class="token punctuation">}</span><span class="token punctuation">,</span>
    118. 

  118.   <span class="token function">activated</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    119. 

  119.     <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">handlePlaylist</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>playlist<span class="token punctuation">)</span>
    120. 

  120.   <span class="token punctuation">}</span><span class="token punctuation">,</span>
    121. 

  121.   <span class="token literal-property property">watch</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    122. 

  122.     <span class="token function">playlist</span><span class="token punctuation">(</span><span class="token parameter">newVal</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    123. 

  123.       <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">handlePlaylist</span><span class="token punctuation">(</span>newVal<span class="token punctuation">)</span>
    124. 

  124.     <span class="token punctuation">}</span>
    125. 

  125.   <span class="token punctuation">}</span><span class="token punctuation">,</span>
    126. 

  126.   <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    127. 

  127.     <span class="token comment">// 根据选项合并策略，此方法和组件中的方法同名时，则被覆盖。如组件中没有相同名称方法时则会使用此方法，从而抛出错误。</span>
    128. 

  128.     <span class="token function">handlePlaylist</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    129. 

  129.       <span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">Error</span><span class="token punctuation">(</span><span class="token string">'component must implement handlePlaylist method'</span><span class="token punctuation">)</span>
    130. 

  130.     <span class="token punctuation">}</span>
    131. 

  131.   <span class="token punctuation">}</span>
    132. 

  132. <span class="token punctuation">}</span>
    133. 

  133. </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></div></div><p>混入到组件：</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token comment">// 使用，可在多个组件中共用mixin的代码</span>
    134. 

  134. <span class="token keyword">import</span> <span class="token punctuation">{</span> playlistMixin <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@/common/js/mixin'</span> <span class="token comment">// 共享代码的引入</span>
    135. 

  135. <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    136. 

  136.     <span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>playlistMixin<span class="token punctuation">]</span><span class="token punctuation">,</span>
    137. 

  137.     <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    138. 

  138.         <span class="token function">handlePlaylist</span><span class="token punctuation">(</span><span class="token parameter">playlist</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 此方法可针对不同组件做不同处理</span>
    139. 

  139.             <span class="token operator">...</span>
    140. 

  140.         <span class="token punctuation">}</span>
    141. 

  141.     <span class="token punctuation">}</span>
    142. 

  142. <span class="token punctuation">}</span>
    143. 

  143. </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></div></div></div></div>  <div class="page-edit"><div class="edit-link"><a href="https://github.com/heBody/blog/edit/master/docs/《Vue》笔记/04.可复用性&amp;组合/01.Mixin混入.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=Vue" title="标签">#Vue</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/0aa92922ace6bb5e/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">transition-group列表过渡</div></a> <a href="/blog/pages/d00311f8174119b2/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">Vue CLi v3 创建项目使用记录</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
    144. 

  144.         ←
    145. 

  145.         <a href="/blog/pages/0aa92922ace6bb5e/" class="prev">transition-group列表过渡</a></span> <span class="next"><a href="/blog/pages/d00311f8174119b2/">Vue CLi v3 创建项目使用记录</a>→
    146. 

  146.       </span></p></div></div></div> <div class="article-list"><div class="article-title"><a href="/blog/archives/" class="iconfont icon-bi">最近更新</a></div> <div class="article-wrapper"><dl><dd>01</dd> <dt><a href="/blog/pages/922650/"><div>
    147. 

  147.             Git修改分支名
    148. 

  148.             <!----></div></a> <span class="date">08-11</span></dt></dl><dl><dd>02</dd> <dt><a href="/blog/pages/55f894/"><div>
    149. 

  149.             CSS给table的tbody添加滚动条
    150. 

  150.             <!----></div></a> <span class="date">06-29</span></dt></dl><dl><dd>03</dd> <dt><a href="/blog/pages/829589/"><div>
    151. 

  151.             我做了一个手写春联小网页，祝大家虎年暴富
    152. 

  152.             <span class="title-tag">
    153. 

  153.               原创
    154. 

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