webpack.config.js

const path = require("path");
const { VueLoaderPlugin } = require("vue-loader");

module.exports = (env = {}) => ({
  mode: env.prod ? "production" : "development",
  devtool: env.prod ? "source-map" : "cheap-module-eval-source-map",
  entry: path.resolve(__dirname, "./src/main.ts"),
  output: {
    path: path.resolve(__dirname, "./dist"),
    publicPath: "/dist/",
    filename: "build.js"
  },
  resolve: {
    extensions: ['.ts', '.js', '.vue', '.json'],
    alias: {
      // this isn't technically needed, since the default `vue` entry for bundlers
      // is a simple `export * from '@vue/runtime-dom`. However having this
      // extra re-export somehow causes webpack to always invalidate the module
      // on the first HMR update and causes the page to reload.
      vue: "@vue/runtime-dom",
      "vue$": 'vue/dist/vue.esm.js',
      "@": path.resolve(__dirname, "./src")
    }
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        use: "vue-loader"
      },
      {
        test: /\.ts$/,
        loader: "ts-loader",
        exclude: /node_modules/,
        options: {
          appendTsSuffixTo: [/\.vue$/]
        }
      },
      {
        test: /\.png$/,
        use: {
          loader: "url-loader",
          options: { limit: 8192 }
        }
      },
      {
        test: /\.scss$/,
        use: ["vue-style-loader", "css-loader", "sass-loader"]
      }
    ]
  },
  plugins: [new VueLoaderPlugin()],
  devServer: {
    inline: true,
    hot: true,
    stats: "minimal",
    contentBase: __dirname,
    overlay: true
  }
});