babel/packages/babel-preset-env/test/debug-fixtures/usage-none/options.json

{
  "presets": [
    ["../../lib", {
      "debug": true,
      "targets": {
        "chrome": 52,
        "firefox": 50,
        "ie": 11
      },
      "useBuiltIns": "usage"
    }]
  ]
}