将多个Typescript文件合并为一个单独的JS文件，包括树摇动

npm install webpack webpack-cli typescript ts-loader terser-webpack-plugin --save-dev

const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  entry: './src/index.ts',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
    ],
  },
  resolve: {
    extensions: ['.ts', '.js'],
  },
  optimization: {
    minimizer: [new TerserPlugin()],
  },
};

import { foo } from './foo';
import { bar } from './bar';

foo();
bar();

export function foo() {
  console.log('This is foo function');
}

export function bar() {
  console.log('This is bar function');
}

npx webpack --config webpack.config.js