2019年にIE 11に対応するためのbabel設定

絶対また忘れるのでメモしておきます。
余裕ができたら検証したい…！

package.json

{
  ...
  "scripts": {
    "build": "webpack --config webpack.config.js"
  },
  "devDependencies": {
    "@babel/core": "^7.7.2",
    "@babel/preset-env": "^7.7.1",
    "babel-loader": "^8.0.6",
    "core-js": "^3.4.1",
    "regenerator-runtime": "^0.13.3",
    "webpack": "^4.41.2",
    "webpack-cli": "^3.3.10"
  }
}

babel.config.js

module.exports = {
  presets: [
    [
      '@babel/preset-env',
      {
        targets: {
          ie: '11'
        },
        useBuiltIns: 'usage',
        corejs: 3
      }
    ]
  ]
}

webpack.config.js

module.exports = {
  ...
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
          }
        ]
      }
    ]
  }
}

main.js

import 'core-js/stable';
import 'regenerator-runtime/runtime';

...