tsc --init

{
 "compilerOptions": {
  /* Basic Options */
  // "incremental": true,          /* Enable incremental compilation */
  "target": "es5",             /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
  "module": "commonjs",           /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
  // "lib": [],               /* Specify library files to be included in the compilation. */
  // "allowJs": true,            /* Allow javascript files to be compiled. */
  // "checkJs": true, ...
 }
}

npm i -g webpack webpack-cli

npm i -D ts-loader typescript

const path = require('path')
module.exports = {
  mode: 'production',
  entry: {
    main: './index.ts'
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        use: 'ts-loader',
        exclude: /node_modules/
      }
    ]
  },
  output: {
    filename: 'webpack-bundle.js',
    path: path.resolve(__dirname, 'dist'),
    libraryTarget: 'commonjs',
  },
  resolve: {
    extensions: ['.ts']
  }
}

% webpack  
Hash: 1c028195d238a71fe1c7
Version: webpack 4.41.3
Time: 726ms
Built at: 2019/12/17 下午2:56:12
  Asset   Size Chunks       Chunk Names
index.js 1.61 KiB    0 [emitted] main
Entrypoint main = index.js
[0] ./a.ts 147 bytes {0} [built]
[1] ./b.ts 147 bytes {0} [built]
[2] ./index.ts 318 bytes {0} [built]
[3] ./c.ts 378 bytes {0} [built]

npm i -g gulp

npm i -D gulp browserify tsify vinyl-source-stream

const gulp = require('gulp')
const tsify = require('tsify')
const browserify = require('browserify')
const source = require('vinyl-source-stream')

gulp.task('default', () => {
  return browserify({
    basedir: '.',
    debug: true,
    entries: ['index.ts'],
    cache: {},
    packageCache: {}
  }).plugin(tsify).bundle()
  .pipe(source('gulp-bundle.js'))
  .pipe(gulp.dest('dist'))
})

% gulp
[15:37:30] Using gulpfile ~/ts-learn/bundle/gulpfile.js
[15:37:30] Starting 'default'...
[15:37:32] Finished 'default' after 1.4 s

"scripts": {
  "test": "ts-node test",
  "build-webpack": "webpack",
  "build-gulp": "gulp",
  "build": "npm run build-webpack"
}