CSS.getSupportedSystemFontFamilyNames

Returns all supported system font family names.

{
  "name": "getSupportedSystemFontFamilyNames",
  "returns": [
    {
      "name": "fontFamilyNames",
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Supported system font families."
    }
  ],
  "description": "Returns all supported system font family names."
}