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_assets/build/webpack.dev.conf.js

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+var fs = require('fs')
+var path = require('path')
+var utils = require('./utils')
+var webpack = require('webpack')
+var config = require('../config')
+var merge = require('webpack-merge')
+var baseWebpackConfig = require('./webpack.base.conf')
+var CopyWebpackPlugin = require('copy-webpack-plugin')
+var HtmlWebpackPlugin = require('html-webpack-plugin')
+var ExtractTextPlugin = require('extract-text-webpack-plugin')
+var FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
+
+module.exports = merge(baseWebpackConfig, {
+  watch: true,
+  module: {
+    rules: utils.styleLoaders({
+      sourceMap: config.dev.produceSourceMap,
+      extract: true
+    })
+  },
+  devtool: '#cheap-module-eval-source-map',
+  output: {
+    path: config.dev.assetsRoot,
+    filename: utils.assetsPath('js/[name].[chunkhash].js'),
+    chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
+  },
+  plugins: [
+    new webpack.NoEmitOnErrorsPlugin(),
+    new FriendlyErrorsPlugin(),
+    new webpack.DefinePlugin({
+      'process.env': config.dev.env
+    }),
+    // extract css into its own file
+    new ExtractTextPlugin({
+      filename: utils.assetsPath('css/[name].[contenthash].css')
+    }),
+    // generate dist index.html with correct asset hash for caching.
+    // you can customize output by editing /index.html
+    // see https://github.com/ampedandwired/html-webpack-plugin
+    new HtmlWebpackPlugin({
+      filename: config.dev.index,
+      template: 'index.html',
+      inject: true,
+      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
+      chunksSortMode: 'dependency',
+      serviceWorkerLoader: `<script>${fs.readFileSync(path.join(__dirname,
+        './service-worker-dev.js'), 'utf-8')}</script>`
+    }),
+    // split vendor js into its own file
+    new webpack.optimize.CommonsChunkPlugin({
+      name: 'vendor',
+      minChunks: function (module, count) {
+        // any required modules inside node_modules are extracted to vendor
+        return (
+          module.resource &&
+          /\.js$/.test(module.resource) &&
+          module.resource.indexOf(
+            path.join(__dirname, '../node_modules')
+          ) === 0
+        )
+      }
+    }),
+    // extract webpack runtime and module manifest to its own file in order to
+    // prevent vendor hash from being updated whenever app bundle is updated
+    new webpack.optimize.CommonsChunkPlugin({
+      name: 'manifest',
+      chunks: ['vendor']
+    }),
+    // copy custom static assets
+    new CopyWebpackPlugin([
+      {
+        from: path.resolve(__dirname, '../static'),
+        to: config.dev.assetsSubDirectory,
+        ignore: ['.*']
+      }
+    ])
+  ]
+})