The Package (dot) JSON: A story of love, triumph, and general witchcraft/wizardry - InitFields: Engines

ThePackageDotJson_InitFields-Engines.json

[{
  "npm:current": {
    "ref": "",
    "source": [
    
    ]
  },
  "npm:legacy": {
    "ref": "",
    "source": [
    
    ]
  },
  "yarn:current": {
    "ref": "null",
    "source": "null"
  },
  "yarn:legacy": {
    "ref": "https://classic.yarnpkg.com/en/docs/package-json/#toc-engines",
    "source": [
      "The engines specify versions of clients that must be used with your package. This checks against 'process.versions' as well as the current version of yarn.",
     "This check follows normal semver rules with one exception. It allows prerelease versions to match semvers that do not explicitly specify a prerelease. For example, '1.4.0-rc.0' matches '>=1.3.0', while it would not match a typical semver check.",
      "_example_:{ \n \"engines\": { \n \"node\": \">=4.4.7 <7.0.0\", \n \"zlib\": \"^1.2.8\", \n \"yarn\": \"^0.14.0\" \n } \n }:_example_"
    ]
  }
}]