webpack.config.dev.js

const path = require("path");
const webpack = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");

const GLOBALS = {
  "process.env.NODE_ENV": JSON.stringify("development"),
  __DEV__: true
};

const dirNode = "node_modules";
const dirApp = path.join(__dirname, "app");
const dirAssets = path.join(__dirname, "assets");

module.exports = {
  target: "web",
  mode: "development",
  entry: {
    vendor: ["lodash"],
    bundle: path.join(dirApp, "index")
  },
  devtool: "eval",
  output: {
    pathinfo: true,
    publicPath: "/",
    filename: "[name].js"
  },
  resolve: {
    modules: [dirNode, dirApp, dirAssets]
  },
  plugins: [
    new webpack.DefinePlugin(GLOBALS),
    new webpack.NoEmitOnErrorsPlugin(),
    new HtmlWebpackPlugin({
      // Create HTML file that includes references to bundled CSS and JS.
      template: path.join(__dirname, "index.ejs"),
      minify: {
        removeComments: true,
        collapseWhitespace: true
      },
      inject: true
    })
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        use: ["babel-loader"]
      },
      {
        test: /\.css$/,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              sourceMap: true
            }
          }
        ]
      },
      {
        test: /\.scss/,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              sourceMap: true
            }
          },
          {
            loader: "sass-loader",
            options: {
              sourceMap: true,
              includePaths: [dirAssets]
            }
          }
        ]
      },
      {
        test: /\.ejs$/,
        loader: "ejs-loader"
      },
      {
        test: /\.eot(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              name: "[path][name].[ext]"
            }
          }
        ]
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 10000,
              mimetype: "application/font-woff",
              name: "[path][name].[ext]"
            }
          }
        ]
      },
      {
        test: /\.[ot]tf(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 10000,
              mimetype: "application/octet-stream",
              name: "[path][name].[ext]"
            }
          }
        ]
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 10000,
              mimetype: "image/svg+xml",
              name: "[path][name].[ext]"
            }
          }
        ]
      },
      {
        test: /\.(jpe?g|png|gif)$/,
        loader: "file-loader",
        options: {
          name: "[path][name].[ext]"
        }
      }
    ]
  }
};