const babel = require('@babel/core');

const _global = global || window;
_global.transform = function(code, cb) {
  babel.transform(code, {
    minified: true,
    presets: ['@babel/preset-env'],
  }, (err, result) => {
    if (err)cb(err, null);
    else cb(null, result.code);
  });
};

const path = require('path');

module.exports = {
  entry: './src/index.js',
  mode: 'production',
  output: {
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /.js$/,
        include: [
          path.resolve(__dirname, "node_modules/@babel/core"),
          path.resolve(__dirname, "node_modules/@babel/preset-env")
        ],
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
          },
        },
      },
    ],
  },
  target: 'node'
};

{ Error: Cannot find module '/Users/〇〇/Projects/webpack-demo/node_modules/@babel/preset-env/lib/index.js'
at n (/Users/〇〇/Projects/webpack-demo/dist/main.js:42:100955)
at b (/Users/〇〇/Projects/webpack-demo/dist/main.js:1750:55188)
at t.loadPreset (/Users/〇〇/Projects/webpack-demo/dist/main.js:1750:53373)
at m (/Users/〇〇/Projects/webpack-demo/dist/main.js:42:104613)
at /Users/〇〇/Projects/webpack-demo/dist/main.js:42:103548
at Array.map (<anonymous>)
at R (/Users/〇〇/Projects/webpack-demo/dist/main.js:42:103523)
at g (/Users/〇〇/Projects/webpack-demo/dist/main.js:42:103430)
at /Users/〇〇/Projects/webpack-demo/dist/main.js:42:102661
at /Users/〇〇/Projects/webpack-demo/dist/main.js:1:122682 code: 'MODULE_NOT_FOUND' }