webpack.config.js

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

module.exports = {
  entry: "./src/index.js",
  output: {
    path: path.join(__dirname, "/dist"),
    filename: "index_bundle.js",
    publicPath: "/"
  },
  devServer: { historyApiFallback: true, contentBase: "./" },
  devtool: "inline-source-map",
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      },
      {
        test: /\.css$/,
        include: [path.resolve(__dirname, "not_exist_path")],
        use: ["style-loader", "css-loader"]
      },
      {
        test: /\.(s*)css$/,
        use: ["style-loader", "css-loader", "sass-loader"]
      },
      {
        test: /\.(png|jpg|gif|jpeg)$/,
        use: [
          {
            loader: "url-loader",
            options: {
              limit: 5000
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./src/index.html"
    })
  ],
  devServer: {
    historyApiFallback: true
  }
};