spritejs/sprite-core

{
  "presets": [
    ["@babel/preset-env",
      {
        "targets": {
          "browsers": [
            "> 1%",
            "last 2 versions",
            "not ie <= 8"
          ]
        }
      }
    ]
  ],
  "plugins": [
    [
      "@babel/plugin-proposal-decorators",
      {
        "decoratorsBeforeExport": false
      }
    ],
    "@babel/plugin-proposal-class-properties",
    [
      "@babel/plugin-transform-runtime",
      {
        "corejs": false,
        "helpers": true,
        "regenerator": false,
        "useESModules": false
      }
    ]
  ]
}