路由模式和打包优化

1. 路由模式-将路由改成history模式

hash模式带#，#后面的地址变化不会引起页面的刷新
history没有#，地址变化会引起页面刷新，更符合页面地址的规范（开发环境不刷新-webpack配置）
将路由模式修改成history模式-代码位置(src/router/index.js)

javascript 复制代码

const createRouter = () => new Router({
  mode: 'history', // require service support
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes // 默认引入静态路由
})

2. 打包分析-分析

打包分析代码

javascript 复制代码

$ npm run preview -- --report

去除main.js中对于mock.js的引用

3. CDN加速

将几个比较大的多在打包时排除，这样可以缩小整体打包的大小，保证js的加载速度，排除的包采用cdn的方式用外链去引入，cdn本名为分发服务器，意为更近的访问区间更快的访问速度将所需要的文件返回给客户端

webpack排除打包-代码位置(vue.config.js)

javascript 复制代码

 configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    // 配置需要排出的包
    externals: {
      'vue': 'Vue',
      'element-ui': 'ELEMENT',
      'cos-js-sdk-v5': 'COS'
    }
  },

在html中采用外链引入排除的文件-代码位置(public/index.html)

javascript 复制代码

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <link rel="icon" href="<%= BASE_URL %>favicon.ico">
    <title><%= webpackConfig.name %></title>
    <link href="https://cdn.bootcdn.net/ajax/libs/element-ui/2.15.13/theme-chalk/index.min.css" rel="stylesheet">
  </head>
  <body>
    <noscript>
      <strong>We're sorry but <%= webpackConfig.name %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
    </noscript>
    <div id="app"></div>
    <!-- built files will be auto injected -->
    <script src="https://lf9-cdn-tos.bytecdntp.com/cdn/expire-1-M/vue/2.6.14/vue.min.js"></script>
    <script src="https://cdn.bootcdn.net/ajax/libs/element-ui/2.15.13/index.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/cos-js-sdk-v5/dist/cos-js-sdk-v5.min.js" ></script>

  </body>
</html>

windows配置nginx