.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": false,
        "targets": {
          "browsers": ["last 2 Chrome versions"]
        }
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-decorators",
    ["@babel/plugin-proposal-class-properties", { "loose": true }],
    [
      "babel-plugin-inferno",
      {
        "imports": true
      }
    ]
  ],
  "env": {
    "test": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "browsers": ["last 2 versions"]
            }
          }
        ]
      ],
      "plugins": [
        "@babel/plugin-proposal-decorators",
        ["@babel/plugin-proposal-class-properties", { "loose": true }],
        [
          "babel-plugin-inferno",
          {
            "imports": true
          }
        ],
        "@babel/plugin-transform-classes"
      ]
    },
    "production": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "browsers": ["last 2 versions", "safari >= 7"]
            },
            "useBuiltIns": "usage"
          }
        ]
      ]
    }
  }
}