traverse recursive enumerate javascript object safe from [Circular] reference

objectEnum.js

/**
 * Traverse over an object, safe from [Circular]
 * 
 *  - if value is string or number, returns value
 *  - if value is function, returns array of function arguments
 *  - if value is anything else, returns empty string
 *
 ``` javascript
 
 let test = {
  // [Circular]
  test: test,
  a: function (paramA, paramB, paramC) {
    return {
      b: {}
    }
  },
  b: 'a string',
  c: 134,
  d: [{
    a: new Date()
  }]
}

console.log(objectEnum(test))

{
  test:"",
  a: [
    "paramA",
    "paramB",
    "paramC"
  ],
  b: "a string",
  c: 134,
  d: [{
    a: "2019-09-21T21:44:46.422Z"
  }]
}
 ```
*/
function objectEnum(object) {
  let cache = []
  const str = JSON.stringify(object, function (key, value) {
    if (typeof value === 'object' && value !== null) {
      if (cache.indexOf(value) !== -1) {
        return
      }
      cache.push(value)
    }
    return typeof value === 'object' ? value : (typeof value === 'function' ? (function (func) {
      const fnStr = func.toString().replace(/((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg, '')
      return fnStr.slice(fnStr.indexOf('(') + 1, fnStr.indexOf(')')).match(/([^\s,]+)/g) || []
    })(value) : (['string', 'number'].includes(typeof value) ? value : ''))
  }, 0)
  cache = null
  try {
    return JSON.parse(str)
  } catch (e) {
    return {}
  }
}