webpack.config.dev.js

import webpack from "webpack";
import HtmlWebpackPlugin from "html-webpack-plugin";
import path from "path";

export default {
  resolve: {
    extensions: ["*", ".js", ".jsx", ".json"],
    alias: {
      core: path.resolve(__dirname, "src/core"),
      components: path.resolve(__dirname, "src/components"),
      configs: path.resolve(__dirname, "src/configs"),
      constants: path.resolve(__dirname, "src/constants"),
      locales: path.resolve(__dirname, "src/locales"),
      utils: path.resolve(__dirname, "src/utils"),
      features: path.resolve(__dirname, "src/features"),
      test: path.resolve(__dirname, "src/test")
    }
  },
  devtool: "cheap-module-eval-source-map", // more info:https://webpack.js.org/guides/development/#using-source-maps and https://webpack.js.org/configuration/devtool/
  entry: [
    // must be first entry to properly set public path
    "./src/webpack-public-path",
    "react-hot-loader/patch",
    "webpack-hot-middleware/client?reload=true",
    "whatwg-fetch",
    path.resolve(__dirname, "src/index.js") // Defining path seems necessary for this to work consistently on Windows machines.
  ],
  target: "web",
  output: {
    path: path.resolve(__dirname, "dist"), // Note: Physical files are only output by the production build task `npm run build`.
    publicPath: "/",
    filename: "bundle.js"
  },
  plugins: [
    new webpack.DefinePlugin({
      "process.env.NODE_ENV": JSON.stringify("development"), // Tells React to build in either dev or prod modes. https://facebook.github.io/react/downloads.html (See bottom)
      __DEV__: true
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoEmitOnErrorsPlugin(),
    new HtmlWebpackPlugin({
      // Create HTML file that includes references to bundled CSS and JS.
      template: "src/index.ejs",
      minify: {
        removeComments: true,
        collapseWhitespace: true
      },
      inject: true
    })
  ],
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: ["babel-loader"]
      },
      {
        test: /\.eot(\?v=\d+.\d+.\d+)?$/,
        use: ["file-loader"]
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 10000,
              mimetype: "application/font-woff"
            }
          }
        ]
      },
      {
        test: /\.[ot]tf(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 10000,
              mimetype: "application/octet-stream"
            }
          }
        ]
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 10000,
              mimetype: "image/svg+xml"
            }
          }
        ]
      },
      {
        test: /\.(jpe?g|png|gif|ico)$/i,
        use: [
          {
            loader: "file-loader",
            options: {
              name: "[name].[ext]"
            }
          }
        ]
      },
      {
        test: /(\.css|\.scss|\.sass)$/,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              sourceMap: true
            }
          },
          {
            loader: "postcss-loader",
            options: {
              plugins: () => [require("autoprefixer")],
              sourceMap: true
            }
          },
          {
            loader: "sass-loader",
            options: {
              includePaths: [path.resolve(__dirname, "src", "scss")],
              sourceMap: true
            }
          }
        ]
      }
    ]
  }
};