.babelrc

{
    "presets": [
      [
        "@babel/preset-env",
        {
          "useBuiltIns": "entry",
          "corejs": 3,
          "targets": {
            "browsers": ["last 2 versions"]
          },
          "debug": false,
          "modules": false
        }
      ],
      "@babel/preset-typescript",
      "@babel/preset-react"
    ],
    "plugins": [
        ["@babel/plugin-proposal-decorators", { "legacy": true }],
        ["@babel/plugin-proposal-class-properties", { "loose": true }],
        ["@babel/plugin-transform-runtime", {
        "corejs": false,
        "helpers": true,
        "regenerator": true,
        "useESModules": false
        }], ["react-hot-loader/babel"]]
  }