vue-h5-template/assets/guide_vue2_externals.md.6744fb41.js

import{_ as s,o as n,c as a,R as l}from"./chunks/framework.6241eaf2.js";const i=JSON.parse('{"title":"配置 externals 引入 cdn 资源","description":"","frontmatter":{},"headers":[],"relativePath":"guide/vue2/externals.md","filePath":"guide/vue2/externals.md","lastUpdated":1731315864000}'),p={name:"guide/vue2/externals.md"},o=l(`<h1 id="配置-externals-引入-cdn-资源" tabindex="-1">配置 externals 引入 cdn 资源 <a class="header-anchor" href="#配置-externals-引入-cdn-资源" aria-label="Permalink to &quot;配置 externals 引入 cdn 资源&quot;">​</a></h1><p>这个版本 CDN 不再引入，我测试了一下使用引入 CDN 和不使用，不使用会比使用时间少。网上不少文章测试 CDN 速度块，这个开发者可 以实际测试一下。</p><p>另外项目中使用的是公共 CDN 不稳定，域名解析也是需要时间的（如果你要使用请尽量使用同一个域名）</p><p>因为页面每次遇到<code>&lt;script&gt;</code>标签都会停下来解析执行，所以应该尽可能减少<code>&lt;script&gt;</code>标签的数量 <code>HTTP</code>请求存在一定的开销，100K 的文件比 5 个 20K 的文件下载的更快，所以较少脚本数量也是很有必要的</p><p>暂时还没有研究放到自己的 cdn 服务器上。</p><div class="language-javascript"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> defaultSettings </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> </span><span style="color:#82AAFF;">require</span><span style="color:#A6ACCD;">(</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">./src/config/index.js</span><span style="color:#89DDFF;">&quot;</span><span style="color:#A6ACCD;">)</span><span style="color:#89DDFF;">;</span></span>
<span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> name </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> defaultSettings</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">title </span><span style="color:#89DDFF;">||</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">vue mobile template</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">;</span></span>
<span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> IS_PROD </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> [</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">production</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">prod</span><span style="color:#89DDFF;">&quot;</span><span style="color:#A6ACCD;">]</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">includes</span><span style="color:#A6ACCD;">(process</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">env</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">NODE_ENV)</span><span style="color:#89DDFF;">;</span></span>
<span class="line"></span>
<span class="line"><span style="color:#676E95;font-style:italic;">// externals</span></span>
<span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> externals </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:#F07178;">vue</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">Vue</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#89DDFF;">&quot;</span><span style="color:#F07178;">vue-router</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">VueRouter</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#F07178;">vuex</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">Vuex</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#F07178;">vant</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">vant</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#F07178;">axios</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">axios</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#89DDFF;">};</span></span>
<span class="line"><span style="color:#676E95;font-style:italic;">// CDN外链，会插入到index.html中</span></span>
<span class="line"><span style="color:#C792EA;">const</span><span style="color:#A6ACCD;"> cdn </span><span style="color:#89DDFF;">=</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
<span class="line"><span style="color:#89DDFF;">  </span><span style="color:#676E95;font-style:italic;">// 开发环境</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#F07178;">dev</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:#F07178;">css</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:#F07178;">js</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>
<span class="line"><span style="color:#89DDFF;">  </span><span style="color:#676E95;font-style:italic;">// 生产环境</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#F07178;">build</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:#F07178;">css</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> [</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">https://cdn.jsdelivr.net/npm/vant@2.4.7/lib/index.css</span><span style="color:#89DDFF;">&quot;</span><span style="color:#A6ACCD;">]</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">    </span><span style="color:#F07178;">js</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> [</span></span>
<span class="line"><span style="color:#A6ACCD;">      </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">https://cdn.jsdelivr.net/npm/vue@2.6.11/dist/vue.min.js</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">      </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">https://cdn.jsdelivr.net/npm/vue-router@3.1.5/dist/vue-router.min.js</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">      </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">https://cdn.jsdelivr.net/npm/axios@0.19.2/dist/axios.min.js</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">      </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">https://cdn.jsdelivr.net/npm/vuex@3.1.2/dist/vuex.min.js</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">,</span></span>
<span class="line"><span style="color:#A6ACCD;">      </span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">https://cdn.jsdelivr.net/npm/vant@2.4.7/lib/index.min.js</span><span style="color:#89DDFF;">&quot;</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:#89DDFF;">};</span></span>
<span class="line"><span style="color:#89DDFF;">module.exports</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;">  </span><span style="color:#82AAFF;">configureWebpack</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">config</span><span style="color:#89DDFF;">)</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=&gt;</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
<span class="line"><span style="color:#F07178;">    </span><span style="color:#A6ACCD;">config</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">name</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">name</span><span style="color:#89DDFF;">;</span></span>
<span class="line"><span style="color:#89DDFF;">    </span><span style="color:#676E95;font-style:italic;">// 为生产环境修改配置...</span></span>
<span class="line"><span style="color:#F07178;">    </span><span style="color:#89DDFF;font-style:italic;">if</span><span style="color:#F07178;"> (</span><span style="color:#A6ACCD;">IS_PROD</span><span style="color:#F07178;">) </span><span style="color:#89DDFF;">{</span></span>
<span class="line"><span style="color:#89DDFF;">      </span><span style="color:#676E95;font-style:italic;">// externals</span></span>
<span class="line"><span style="color:#F07178;">      </span><span style="color:#A6ACCD;">config</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">externals</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">externals</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:#F07178;">  </span><span style="color:#89DDFF;">},</span></span>
<span class="line"><span style="color:#A6ACCD;">  </span><span style="color:#82AAFF;">chainWebpack</span><span style="color:#89DDFF;">:</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">config</span><span style="color:#89DDFF;">)</span><span style="color:#A6ACCD;"> </span><span style="color:#C792EA;">=&gt;</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">{</span></span>
<span class="line"><span style="color:#F07178;">    </span><span style="color:#676E95;font-style:italic;">/**</span></span>
<span class="line"><span style="color:#676E95;font-style:italic;">     * 添加CDN参数到htmlWebpackPlugin配置中</span></span>
<span class="line"><span style="color:#676E95;font-style:italic;">     */</span></span>
<span class="line"><span style="color:#F07178;">    </span><span style="color:#A6ACCD;">config</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">plugin</span><span style="color:#F07178;">(</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">html</span><span style="color:#89DDFF;">&quot;</span><span style="color:#F07178;">)</span><span style="color:#89DDFF;">.</span><span style="color:#82AAFF;">tap</span><span style="color:#F07178;">(</span><span style="color:#89DDFF;">(</span><span style="color:#A6ACCD;font-style:italic;">args</span><span style="color:#89DDFF;">)</span><span style="color:#F07178;"> </span><span style="color:#C792EA;">=&gt;</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;">if</span><span style="color:#F07178;"> (</span><span style="color:#A6ACCD;">IS_PROD</span><span style="color:#F07178;">) </span><span style="color:#89DDFF;">{</span></span>
<span class="line"><span style="color:#F07178;">        </span><span style="color:#A6ACCD;">args</span><span style="color:#F07178;">[</span><span style="color:#F78C6C;">0</span><span style="color:#F07178;">]</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">cdn</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">cdn</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">build</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 style="color:#89DDFF;font-style:italic;">else</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">{</span></span>
<span class="line"><span style="color:#F07178;">        </span><span style="color:#A6ACCD;">args</span><span style="color:#F07178;">[</span><span style="color:#F78C6C;">0</span><span style="color:#F07178;">]</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">cdn</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">=</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">cdn</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">dev</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:#F07178;">      </span><span style="color:#89DDFF;font-style:italic;">return</span><span style="color:#F07178;"> </span><span style="color:#A6ACCD;">args</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 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><p>在 public/index.html 中添加</p><div class="language-javascript"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki material-theme-palenight"><code><span class="line"><span style="color:#89DDFF;">&lt;!--</span><span style="color:#A6ACCD;"> 使用CDN的CSS文件 </span><span style="color:#89DDFF;">--&gt;</span></span>
<span class="line"><span style="color:#A6ACCD;">    </span><span style="color:#89DDFF;">&lt;%</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">for</span><span style="color:#A6ACCD;"> (</span><span style="color:#C792EA;">var</span><span style="color:#A6ACCD;"> i </span><span style="color:#89DDFF;">in</span></span>
<span class="line"><span style="color:#A6ACCD;">      htmlWebpackPlugin</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">options</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">cdn</span><span style="color:#89DDFF;">&amp;&amp;</span><span style="color:#A6ACCD;">htmlWebpackPlugin</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">options</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">cdn</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">css) </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">%&gt;</span></span>
<span class="line"><span style="color:#F07178;">      </span><span style="color:#89DDFF;">&lt;</span><span style="color:#F07178;">link</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">href</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">&lt;%= htmlWebpackPlugin.options.cdn.css[i] %&gt;</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">rel</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">preload</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">as</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">style</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;"> /&gt;</span></span>
<span class="line"><span style="color:#F07178;">      </span><span style="color:#89DDFF;">&lt;</span><span style="color:#F07178;">link</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">href</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">&lt;%= htmlWebpackPlugin.options.cdn.css[i] %&gt;</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">rel</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">stylesheet</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;"> /&gt;</span></span>
<span class="line"><span style="color:#F07178;">    </span><span style="color:#89DDFF;">&lt;%</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">%&gt;</span></span>
<span class="line"><span style="color:#A6ACCD;">     </span><span style="color:#89DDFF;">&lt;!--</span><span style="color:#A6ACCD;"> 使用CDN加速的JS文件，配置在vue</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">config</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">js下 </span><span style="color:#89DDFF;">--&gt;</span></span>
<span class="line"><span style="color:#A6ACCD;">    </span><span style="color:#89DDFF;">&lt;%</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;font-style:italic;">for</span><span style="color:#A6ACCD;"> (</span><span style="color:#C792EA;">var</span><span style="color:#A6ACCD;"> i </span><span style="color:#89DDFF;">in</span></span>
<span class="line"><span style="color:#A6ACCD;">      htmlWebpackPlugin</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">options</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">cdn</span><span style="color:#89DDFF;">&amp;&amp;</span><span style="color:#A6ACCD;">htmlWebpackPlugin</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">options</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">cdn</span><span style="color:#89DDFF;">.</span><span style="color:#A6ACCD;">js) </span><span style="color:#89DDFF;">{</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">%&gt;</span></span>
<span class="line"><span style="color:#F07178;">      </span><span style="color:#89DDFF;">&lt;</span><span style="color:#F07178;">script</span><span style="color:#89DDFF;"> </span><span style="color:#C792EA;">src</span><span style="color:#89DDFF;">=</span><span style="color:#89DDFF;">&quot;</span><span style="color:#C3E88D;">&lt;%= htmlWebpackPlugin.options.cdn.js[i] %&gt;</span><span style="color:#89DDFF;">&quot;</span><span style="color:#89DDFF;">&gt;&lt;/</span><span style="color:#F07178;">script</span><span style="color:#89DDFF;">&gt;</span></span>
<span class="line"><span style="color:#F07178;">    </span><span style="color:#89DDFF;">&lt;%</span><span style="color:#F07178;"> </span><span style="color:#89DDFF;">}</span><span style="color:#A6ACCD;"> </span><span style="color:#89DDFF;">%&gt;</span></span></code></pre></div>`,8),t=[o];function e(c,D,r,F,y,C){return n(),a("div",null,t)}const u=s(p,[["render",e]]);export{i as __pageData,u as default};