cld2_react/node_modules/core-js-compat/external.json

{
  "modules": {
    "chrome": "61",
    "edge": "16",
    "firefox": "60",
    "ios": "10.3",
    "opera": "48",
    "opera_mobile": "45",
    "safari": "10.1",
    "samsung": "8.0"
  }
}