.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": false
      }
    ]
  ],
  "plugins": [
    // Stage 0
    // "@babel/plugin-proposal-function-bind",
    // Stage 1
    "@babel/plugin-proposal-export-default-from",
    // "@babel/plugin-proposal-logical-assignment-operators",
    // ["@babel/plugin-proposal-optional-chaining", { "loose": false }],
    // ["@babel/plugin-proposal-pipeline-operator", { "proposal": "minimal" }],
    // ["@babel/plugin-proposal-nullish-coalescing-operator", { "loose": false }],
    // "@babel/plugin-proposal-do-expressions",
    // Stage 2
    [
      "@babel/plugin-proposal-decorators",
      {
        "legacy": true
      }
    ],
    "@babel/plugin-proposal-export-namespace-from",
    // "@babel/plugin-proposal-function-sent",
    // "@babel/plugin-proposal-numeric-separator",
    // "@babel/plugin-proposal-throw-expressions",
    // Stage 3
    "@babel/plugin-syntax-dynamic-import",
    [
      "@babel/plugin-proposal-class-properties",
      {
        "loose": false
      }
    ],
    // "@babel/plugin-syntax-import-meta",
    // "@babel/plugin-proposal-json-strings",
    // Main
    "@babel/plugin-proposal-object-rest-spread",
    [
      "@babel/plugin-transform-runtime",
      {
        "regenerator": true
      }
    ],
  ],
  "env": {
    "test": {
      "plugins": [
        "@babel/plugin-transform-modules-commonjs",
      ]
    }
  }
}


// "@babel/preset-env": "^7.3.4",
// "@babel/plugin-proposal-class-properties": "^7.3.4",
// "@babel/plugin-proposal-decorators": "^7.3.0",
// "@babel/plugin-proposal-export-default-from": "^7.2.0",
// "@babel/plugin-proposal-export-namespace-from": "^7.2.0",
// "@babel/plugin-syntax-dynamic-import": "^7.2.0",
// "@babel/plugin-proposal-object-rest-spread": "^7.3.4",
// "@babel/plugin-transform-runtime": "^7.3.4",
// "@babel/plugin-transform-modules-commonjs": "^7.2.0",

// "@babel/plugin-proposal-do-expressions": "^7.2.0",
// "@babel/plugin-proposal-function-bind": "^7.2.0",
// "@babel/plugin-proposal-function-sent": "^7.2.0",
// "@babel/plugin-proposal-json-strings": "^7.2.0",
// "@babel/plugin-proposal-logical-assignment-operators": "^7.2.0",
// "@babel/plugin-proposal-nullish-coalescing-operator": "^7.2.0",
// "@babel/plugin-proposal-numeric-separator": "^7.2.0",
// "@babel/plugin-proposal-optional-chaining": "^7.2.0",
// "@babel/plugin-proposal-pipeline-operator": "^7.3.2",
// "@babel/plugin-proposal-throw-expressions": "^7.2.0",
// "@babel/plugin-syntax-import-meta": "^7.2.0",
// "@babel/polyfill": "^7.2.5",
// "@babel/preset-stage-0": "^7.0.0",
// "babel-plugin-transform-imports": "^1.5.1",