.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "browsers": ["> 1%", "not op_mini all"],
          "node": "8"
        },
        "modules": false
      }
    ]
  ],
  "plugins": [
    [
      "@babel/plugin-proposal-decorators",
      {
        "legacy": true
      }
    ],
    [
      "@babel/plugin-proposal-class-properties",
      {
        "loose": true
      }
    ],
    "@babel/plugin-syntax-dynamic-import",
    [
      "@babel/plugin-transform-runtime",
      {
        "helpers": false,
        "polyfill": false,
        "regenerator": true,
        "moduleName": "babel-runtime"
      }
    ],
    "@babel/plugin-proposal-object-rest-spread"
  ],
  "env": {
    "test": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "node": "current"
            }
          }
        ]
      ],
      "plugins": [
        "@babel/plugin-syntax-dynamic-import",
        "dynamic-import-node-babel-7"
      ]
    }
  }
}