.babelrc.json

{
"presets": [
  [
    "@babel/preset-env",
    {
      "targets": "defaults",
      "useBuiltIns": "usage",
      "corejs": "3.8"
    }
  ],
  "@babel/preset-react",
  "@babel/preset-typescript"
],
"env": {
  "dev": {
    "presets": [
      "react-hmre"
    ]
  },
  "test": {
    "presets": [
      "@babel/preset-typescript"
    ]
  }
},
"plugins": [
  "@babel/plugin-syntax-dynamic-import",
  "@babel/plugin-syntax-import-meta",
  "@babel/plugin-proposal-class-properties",
  "@babel/plugin-proposal-json-strings",
  [
    "@babel/plugin-proposal-decorators",
    {
      "legacy": true
    }
  ],
  "@babel/plugin-proposal-function-sent",
  "@babel/plugin-proposal-export-namespace-from",
  "@babel/plugin-proposal-numeric-separator",
  "@babel/plugin-proposal-throw-expressions",
  "@babel/plugin-proposal-export-default-from",
  "@babel/plugin-proposal-logical-assignment-operators",
  "@babel/plugin-proposal-optional-chaining",
  [
    "@babel/plugin-proposal-pipeline-operator",
    {
      "proposal": "minimal"
    }
  ],
  "@babel/plugin-proposal-nullish-coalescing-operator",
  "@babel/plugin-proposal-do-expressions",
  "@babel/plugin-proposal-function-bind"
]
}