@greenwood/plugin-babel/src/babel.config.mjs

A Greenwood plugin for using Babel and applying it to your JavaScript.

export default {
  // https://github.com/zloirock/core-js/blob/master/docs/2019-03-19-core-js-3-babel-and-a-look-into-the-future.md#babelpreset-env
  presets: [
    [
      // https://babeljs.io/docs/en/babel-preset-env
      "@babel/preset-env",
      {
        // https://babeljs.io/docs/en/babel-preset-env#usebuiltins
        useBuiltIns: "entry",

        // https://babeljs.io/docs/en/babel-preset-env#modules
        // preserves ES Modules
        modules: false,

        // https://babeljs.io/docs/en/babel-preset-env#corejs
        corejs: {
          version: 3,
          proposals: true,
        },

        // https://babeljs.io/docs/en/babel-preset-env#configpath
        configPath: import.meta.url,
      },
    ],
  ],

  // https://github.com/babel/babel/issues/8829#issuecomment-456524916
  plugins: [
    [
      // https://babeljs.io/docs/en/babel-plugin-transform-runtime
      "@babel/plugin-transform-runtime",
      {
        regenerator: true,
        useESModules: true,
      },
    ],
  ],
};