babel.config.js

module.exports = function (api) {
  api.cache.never()
  return {
    plugins: [
      "@loadable/babel-plugin",
      "@babel/plugin-proposal-object-rest-spread",
      "@babel/plugin-proposal-class-properties",
      "@babel/syntax-dynamic-import",
      "@babel/plugin-proposal-optional-chaining",
      ["@babel/plugin-transform-runtime", { corejs: 3 }],
    ],
    presets: [
      "@babel/preset-react",
      [
        "@babel/preset-env",
        {
          targets: {
            chrome: "63",
            firefox: "60",
            safari: "11",
          },
          useBuiltIns: "usage",
          corejs: 3,
        },
      ],
      "@babel/preset-typescript",
    ],
    sourceType: "unambiguous",
  }
}