创建vue-cli3项目和配置

https://segmentfault.com/a/1190000017008697

一、创建项目:

1、创建第一项

vue create hello-world

2、你会被提示选取一个 preset。选择第一项:node-sass\vuex\axios

3、下载所需要的插件:

cnpm i --save-dev compression-webpack-plugin//gzip压缩
cnpm i --save-dev @gfx/zopfli brotli-webpack-plugin//Zopfli压缩
cnpm install node-sass --save-dev //安装node-sass 
cnpm install sass-loader --save-dev //安装sass-loader 
cnpm install style-loader --save-dev //安装style-loader

安装sass和配置

二、配置vue.config.js

1、前言:

新版vue-cli,没了webpack.config配置文件,我要配置一个插件怎么办?,

由于vue-cli3内置了webpack的配置,如果需要查看配置查看上一篇,
如果需要自己增加一些配置,则在项目根据下创建文件vue-config.js既可

2、vue.config.js

说明:

(1)baseUrl: "./", // 构建好的文件输出到哪里,该属性已被废弃,改成:publicPath:"./"
(2)# vue cli3使用官方方法配置sass全局变量报错

你可能是新版 sass-loader 的受害者。

// 旧
data: `@import "~@/assets/scss/variables.scss";`
// 新
prependData: `@import "~@/assets/scss/variables.scss";`

源码:

const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV);
const path =  require('path');
const resolve = (dir) => path.join(__dirname, dir);
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer');//打包分析
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');//去掉console.log
// 开启gzip压缩
const CompressionWebpackPlugin = require('compression-webpack-plugin');
const productionGzipExtensions = /\.(js|css|json|txt|html|ico|svg)(\?.*)?$/i;
//Zopfli压缩
const zopfli = require("@gfx/zopfli");
const BrotliPlugin = require("brotli-webpack-plugin");

module.exports = {
    publicPath: './', // 默认'/',部署应用包时的基本 URL
    outputDir: process.env.outputDir || 'dist', // 'dist', 生产环境构建文件的目录
    assetsDir: '',  // 相对于outputDir的静态资源(js、css、img、fonts)目录
    lintOnSave: false,
    runtimeCompiler: true, // 是否使用包含运行时编译器的 Vue 构建版本
    productionSourceMap: false,  // 生产环境的 source map
    parallel: require('os').cpus().length > 1,
    pwa: {},

    // 配置proxy跨域
    devServer: {
        overlay: {
          warnings: true,
          errors: true
        },
        open: IS_PROD,
        host: '0.0.0.0',
        port: 8000,
        https: false,
        hotOnly: false,
        proxy: {
            '/api': {
                target: process.env.VUE_APP_BASE_API || 'http://127.0.0.1:8080',
                changeOrigin: true
            }
        }
    },
    // 修复HMR(热更新)失效
    chainWebpack: config => {
        //添加别名
        config.resolve.alias
            .set('@', resolve('src'))
            .set('assets', resolve('src/assets'))
            .set('components', resolve('src/components'))
            .set('layout', resolve('src/layout'))
            .set('base', resolve('src/base'))
            .set('static', resolve('src/static'));
        // 打包分析
        if (process.env.IS_ANALYZ) {
            config.plugin('webpack-report')
                .use(BundleAnalyzerPlugin, [{
                    analyzerMode: 'static',
                }]);
        }

        // 修复HMR
        config.resolve.symlinks(true);

    },
    // 配置externals
    // 防止将某些 import 的包(package)打包到 bundle 中,而是在运行时(runtime)再去从外部获取这些扩展依赖
    configureWebpack: config => {
        config.externals = {
           /* 'vue': 'Vue',
            'element-ui': 'ELEMENT',
            'vue-router': 'VueRouter',
            'vuex': 'Vuex',
            'axios': 'axios'*/
        }
        // 去掉console.log
        if (IS_PROD) {
            const plugins = [];
            plugins.push(
                //js混淆和去掉debugger,console.log
                new UglifyJsPlugin({
                    uglifyOptions: {
                        compress: {
                            warnings: false,
                            drop_console: true,
                            drop_debugger: false,
                            pure_funcs: ['console.log']//移除console
                        }
                    },
                    sourceMap: false,
                    parallel: true
                })
            );

            plugins.push(
                //开启Zopfli压缩
                new CompressionWebpackPlugin({
                    algorithm(input, compressionOptions, callback) {
                        return zopfli.gzip(input, compressionOptions, callback);
                    },
                    compressionOptions: {
                        numiterations: 15
                    },
                    minRatio: 0.99,
                    test: productionGzipExtensions
                })
            );
            plugins.push(
                new BrotliPlugin({
                    test: productionGzipExtensions,
                    minRatio: 0.99
                })
            );
            config.plugins = [
                ...config.plugins,
                ...plugins
            ];
        }
    },
    // 为sass提供全局样式,以及全局变量
    css: {
        modules: false,
        extract: IS_PROD,
        sourceMap: false,
        loaderOptions: {
            sass: {
                // 向全局sass样式传入共享的全局变量
                prependData: `@import "~assets/scss/variables.scss";$src: "${process.env.VUE_APP_SRC}";`
            }
        }
    }
};

其他配置参考如下:vue.config.js


const path = require('path')
const CompressionWebpackPlugin = require('compression-webpack-plugin')
const UglifyjsWebpackPlugin = require('uglifyjs-webpack-plugin')
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer')
const port = process.env.port || process.env.npm_config_port || 8888
const cdnDomian = './' // cdn域名,如果有cdn修改成对应的cdn
const name = 'H5Vue' // page title
const IS_PRODUCTION = process.env.NODE_ENV === 'production'
const cdn = {
  css: [],
  js: [
    'https://cdn.bootcss.com/vue/2.6.10/vue.min.js',
    'https://cdn.bootcss.com/vue-router/3.0.3/vue-router.min.js',
    'https://cdn.bootcss.com/vuex/3.1.0/vuex.min.js',
    'https://cdn.bootcss.com/axios/0.19.0-beta.1/axios.min.js',
    'https://cdn.bootcss.com/js-cookie/2.2.1/js.cookie.min.js'
  ]
}

const externals = {
  vue: 'Vue',
  'vue-router': 'VueRouter',
  vuex: 'Vuex',
  axios: 'axios',
  'js-cookie': 'Cookies'
}

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

module.exports = {
  publicPath: IS_PRODUCTION ? cdnDomian : './',////部署应用包时的基本 URL
  outputDir: 'dist', //  //当运行 vue-cli-service build 时生成的生产环境构建文件的目录
  assetsDir: 'static',////放置生成的静态资源 (js、css、img、fonts) 的 (相对于 outputDir 的) 目录
  lintOnSave: process.env.NODE_ENV === 'development', // eslint-loader 是否在保存的时候检查 安装@vue/cli-plugin-eslint有效
  productionSourceMap: false,//是否使用包含运行时编译器的 Vue 构建版本。设置true后你就可以在使用template
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      // change xxx-api/login => mock/login
      // detail: https://cli.vuejs.org/config/#devserver-proxy
      [process.env.VUE_APP_BASE_API]: {
        target: `http://127.0.0.1:${port}/mock`,
        changeOrigin: true,
        pathRewrite: {
          ['^' + process.env.VUE_APP_BASE_API]: ''
        }
      }
    },
    after: require('./mock/mock-server.js')
  },
  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'), // 主目录
        'views': resolve('src/views'), // 页面
        'components': resolve('src/components'), // 组件
        'api': resolve('src/api'), // 接口
        'utils': resolve('src/utils'), // 通用功能
        'assets': resolve('src/assets'), // 静态资源
        'style': resolve('src/style') // 通用样式
      }
    }
  },
  chainWebpack (config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
    // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
    if (IS_PRODUCTION) {
      config.plugin('analyzer').use(BundleAnalyzerPlugin)
      config.plugin('html').tap(args => {
        args[0].cdn = cdn
        return args
      })
      config.externals(externals)
      config.plugin('html').tap(args => {
        args[0].minify.minifyCSS = true // 压缩html中的css
        return args
      })
      // gzip需要nginx进行配合
      config
        .plugin('compression')
        .use(CompressionWebpackPlugin)
        .tap(() => [
          {
            test: /\.js$|\.html$|\.css/, // 匹配文件名
            threshold: 10240, // 超过10k进行压缩
            deleteOriginalAssets: false // 是否删除源文件
          }
        ])
      config.optimization.minimizer([
        new UglifyjsWebpackPlugin({
          // 生产环境推荐关闭 sourcemap 防止源码泄漏
          // 服务端通过前端发送的行列,根据 sourcemap 转为源文件位置
          // sourceMap: true,
          uglifyOptions: {
            warnings: false,
            compress: {
              drop_console: true,
              drop_debugger: true
            }
          }
        })
      ])
    }
  },
  css: {
    // 是否使用css分离插件 ExtractTextPlugin
    extract: !!IS_PRODUCTION,
    // 开启 CSS source maps?
    sourceMap: false,
    // css预设器配置项
    // 启用 CSS modules for all css / pre-processor files.
    modules: false,
    loaderOptions: {
      sass: {
        data: '@import "style/_mixin.scss";@import "style/_variables.scss";@import "style/common.scss";' // 全局引入
      }
    }
  }
}

其他链接:https://www.cnblogs.com/wwthuanyu/p/10975134.html

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