Develoment和Production

lesson/webpack.prod.js

lesson/webpack.dev.js

lesson/package.json

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"scripts": {
  "dev": "webpack-dev-server --config webpack.dev.js",
  "build": "webpack --config webpack.prod.js"
},

lesson/webpack.common.js

npm install webpack-merge -D

lesson/webpack.common.js

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const path = require('path');
var HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin'); 

module.exports = {
  entry: './src/index.js',
  module: {
    rules: [{ 
      test: /\.js$/, 
      exclude: /node_modules/, 
      loader: "babel-loader",
    },{
      test: /\.(jpg|pnd|gif)$/,
      use: {
        loader: 'url-loader',
        options: {
          name: '[name]_[hash].[ext]',
          outputPath: 'images/',
          limit: 20480
        }
      }
    },{
      test: /\.scss$/,
      use: [
        'style-loader', 
        {
          loader: 'css-loader',
          options: {
            importLoaders: 2
          }
        },
        'sass-loader',
        'postcss-loader'
      ]
    },{
      test: /\.css$/,
      use: [
        'style-loader', 
        'css-loader',
        'postcss-loader'
      ]
    }]
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      template: 'src/index.html'
    }),
  ],
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dist')
  }
}

lesson/webpack.dev.js

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const webpack = require('webpack');
const merge = require('webpack-merge');
const commonConfig = require('./webpack.common');

const devConfig = {
  mode: 'development',
  devtool: 'cheap-module-eval-source-map',
  devServer: {
    contentBase: './dist',
    open: true,
    hot: true,
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin()
  ],
  optimization: {
    usedExports: true
  }
}

module.exports = merge(commonConfig, devConfig)

lesson/webpack.prod.js

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const merge = require('webpack-merge');
const commonConfig = require('./webpack.common');

const prodConfig = {
  mode: 'production',
  devtool: 'cheap-module-source-map',
}

module.exports = merge(commonConfig, prodConfig)