vue-cli3.0 和2.0 脚手架下载命令,cdn引入外部文件

别人写的https://blog.csdn.net/qq_36407748/article/details/80739787
引入外部文件的配置https://blog.csdn.net/qq_15243963/article/details/82255540

1.脚手架下载命令

npm install -g @vue/cli
//yarn add global @vue/cli
vue create 

前两个是必须的

2.自己建一个vue.config.js文件，配置webpack

/**
 * 自定义webpack配置,在vue-cli中通过cdn,引入element-ui等第三方文件，需要注意文件名，
如（ELEMENT）要全大写
 */

const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
const webpack = require('webpack')
const CompressionPlugin = require("compression-webpack-plugin")
module.exports = {
  //  filenameHashing: false,//是否带hash值
  configureWebpack: (config) => {
    if (process.env.NODE_ENV === 'production') {
      // mutate config for production...
      return {
        externals: {
          'vue': 'Vue',
          "element-ui": "ELEMENT",
          "vue-router": "VueRouter",
         },
        performance: {
          hints: false, // 关闭性能提示
          maxAssetSize: 1048576, // 整数类型（以字节为单位）
          maxEntrypointSize: 1048576, // 整数类型（以字节为单位）
          assetFilter: function(assetFilename) {
            // 提供资源文件名的断言函数
            return assetFilename.endsWith('.css') || assetFilename.endsWith('.js');
          }
        },
        plugins: [
          new CompressionPlugin({
            asset: "[path].gz[query]",
            algorithm: "gzip",
            test: /\.(js|html|css)$/,
            threshold: 102400,
            minRatio: 0.8
          }),
          new webpack.DefinePlugin({
           _URL_: "'http://10.*.*.*:8080'"
          }),
          new UglifyJsPlugin({
            sourceMap: true,
            uglifyOptions: {
              compress: {
                warnings: false,
                drop_console: true
              }
            }
          })
        ]
      }
    } else {
      // mutate for development...
      return {
        // devServer: {
        //   port: 5999,
        //   open:true
        //  },
        externals: {
          'vue' : 'Vue',
          // 'vuex' : 'Vuex',
          'vue-router' : 'VueRouter',
          'element-ui' : 'ELEMENT',
          // 'jquery' : 'jQuery',
          // 'axios' : 'axios',
         },
        plugins: [
          new webpack.DefinePlugin({
            _URL_: "'http://10.*.*.*:8080'" 
          })
        ]
      }
    }
  }
}

vue-cli2.0,cdn引入外部文件,externals在webpack.base.conf.js中,和output同级

'use strict'
const path = require('path')
const utils = require('./utils')
const config = require('../config')
const vueLoaderConfig = require('./vue-loader.conf')

let assetsRoot = config.dev.assetsRoot
let assetsPublicPath = config.dev.assetsPublicPath
if (process.env.NODE_ENV === 'production') {
  assetsRoot = config.build.assetsRootPro
  assetsPublicPath = config.build.assetsPublicPathPro
} else if (process.env.NODE_ENV === 'sit') {
  assetsRoot = config.build.assetsRootSit
  assetsPublicPath = config.build.assetsPublicPathSit
}

function resolve(dir) {
  return path.join(__dirname, '..', dir)
}

const createLintingRule = () => ({
  test: /\.(js|vue)$/,
  loader: 'eslint-loader',
  enforce: 'pre',
  include: [resolve('src'), resolve('test')],
  options: {
    formatter: require('eslint-friendly-formatter'),
    emitWarning: !config.dev.showEslintErrorsInOverlay
  }
})

module.exports = {
  context: path.resolve(__dirname, '../'),
  entry: {
    app: ['babel-polyfill', './src/main.js']
  },
  externals: {
    'vue' : 'Vue',
    'vuex' : 'Vuex',
    'vue-router' : 'VueRouter',
    'element-ui' : 'ELEMENT',
    'jquery' : 'jQuery',
    'axios' : 'axios',
   },
  output: {
    path: assetsRoot,
    filename: '[name].js',
    publicPath: assetsPublicPath
  },
  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      vue$: 'vue/dist/vue.esm.js',
      '@': resolve('src'),
      src: path.resolve(__dirname, '../src'),
      api: path.resolve(__dirname, '../src/api'),
      assets: path.resolve(__dirname, '../src/assets'),
      config: path.resolve(__dirname, '../src/config'),
      directive: path.resolve(__dirname, '../src/directive'),
      mixins: path.resolve(__dirname, '../src/mixins'),
      mock: path.resolve(__dirname, '../src/mock'),
      modules: path.resolve(__dirname, '../src/modules'),
      router: path.resolve(__dirname, '../src/router'),
      scss: path.resolve(__dirname, '../src/scss'),
      store: path.resolve(__dirname, '../src/store'),
      test: path.resolve(__dirname, '../src/test'),
      utils: path.resolve(__dirname, '../src/utils'),
      vendor: path.resolve(__dirname, '../src/vendor'),
      views: path.resolve(__dirname, '../src/views'),

      static: path.resolve(__dirname, '../static')
    }
  },
  module: {
    rules: [
      ...(config.dev.useEslint ? [createLintingRule()] : []),
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [
          resolve('src'),
          resolve('test'),
          resolve('node_modules/webpack-dev-server/client'),
          resolve('node_modules/element-ui/src'),
          resolve('node_modules/vue-localStorage'),
          resolve('node_modules/element-ui/packages')
        ]
      },
      {
        test: /\.exec.min\.js$/,
        use: ['script-loader']
      },
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('img/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('media/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
        }
      }
    ]
  },
  node: {
    // prevent webpack from injecting useless setImmediate polyfill because Vue
    // source contains it (although only uses it if it's native).
    setImmediate: false,
    // prevent webpack from injecting mocks to Node native modules
    // that does not make sense for the client
    dgram: 'empty',
    fs: 'empty',
    net: 'empty',
    tls: 'empty',
    child_process: 'empty'
  }
}