webpack- 5-2PWA配置

首先我说一下什么是PWA,PWA如果我们在线上环境配置了PWA这种技术，当用户成功访问一次我们线上代码的时候，浏览器就会缓存住这个网页，如果服务器在用户访问的过程中挂掉了，那么用户再访问这个地址的时候，就会显示之前缓存的页面
依赖

cnpm install http-server -D
cnpm install workbox-webpack-plugin -D

wepack.prod.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const WorkboxPlugin = require('workbox-webpack-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const { merge } = require('webpack-merge');
const baseConfig = require('./webpack.base.js');
const prodConfig = {
  mode: 'production',
  devtool: 'cheap-module-source-map',//线上
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              // modules: true
            }
          },
          {
            loader: "postcss-loader"
          }
        ]
      },
      {
        test: /\.scss$/, //识别所有以css文件结尾的文件;use中的执行顺序:从右向左,从下到上
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 2,
              // modules: true
            }
          },
          {
            loader: 'postcss-loader'
          },
          {
            loader: 'sass-loader'
          }
        ]
      },
    ]
  },
  optimization: {
    minimizer: [
      new CssMinimizerPlugin(),
    ],
  },
  plugins: [ //依赖的插件
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[name].chunk.css'
    }),
    new WorkboxPlugin.GenerateSW({
      clientsClaim: true,
      skipWaiting: true
    })
  ],
  output: {
    filename: '[name].[contenthash].js', //webpack打包好的文件名称
    chunkFilename: '[name].[contenthash].chunk.js',//间接引入 例如chunk的名字 命名
  }
}

module.exports = merge(baseConfig, prodConfig);

package.json

{
  "name": "webpack-config",
  "version": "1.0.0",
  "sideEffects": [
    "@babel/polly-fill",
    "*.scss",
    "*.css"
  ],
  "description": "webpack配置研究",
  "main": "index.js",
  "scripts": {
    "start": "http-server dist",
    "build": "cross-env NODE_ENV=production webpack --config config/webpack.prod.js",
    "dev": "cross-env NODE_ENV=development webpack-dev-server --config config/webpack.dev.js"
  },
  "author": "xiaobaocheng",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.12.10",
    "@babel/preset-env": "^7.12.10",
    "autoprefixer": "^10.1.0",
    "babel-loader": "^8.2.2",
    "clean-webpack-plugin": "^3.0.0",
    "core-js": "^2.6.5",
    "cross-env": "^7.0.3",
    "css-loader": "^5.0.1",
    "css-minimizer-webpack-plugin": "^1.1.5",
    "file-loader": "^6.2.0",
    "html-webpack-plugin": "^4.5.0",
    "http-server": "^0.12.3",
    "imports-loader": "^1.2.0",
    "mini-css-extract-plugin": "^1.3.3",
    "node-sass": "^5.0.0",
    "postcss-loader": "^4.1.0",
    "sass-loader": "^10.1.0",
    "style-loader": "^2.0.0",
    "url-loader": "^4.1.1",
    "webpack": "^4.44.2",
    "webpack-cli": "^3.3.12",
    "webpack-dev-server": "^3.11.0",
    "webpack-merge": "^5.7.0",
    "workbox-webpack-plugin": "^6.0.2"
  },
  "dependencies": {
    "@babel/polyfill": "^7.12.1",
    "jquery": "^3.5.1",
    "lodash": "^4.17.20"
  }
}

index.js

if ('serviceWorker' in navigator) {
  window.addEventListener('load', () => {
    navigator.serviceWorker.register('/service-worker.js').then(registration => {
      console.log('serviceWorker registed');
    }).catch(err => {
      console.log('serviceWorker registed error');
    })
  })
}

有空我弄一个码云上的小例子，以后发上来

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