{
  "presets": [
    [
      "@babel/preset-env",
      {
        "useBuiltIns": "entry",
        "corejs": {
          "version": 3
        },
        "targets": {
          "chrome": "69",
          "ie": "11",
          "firefox": "62",
          "safari": "10"
        }
      }
    ]
  ] 
}