PHP's uniqid in JavaScript

module.exports = functionuniqid (prefix, moreEntropy) {
//  discuss at: https://locutus.io/php/uniqid/
// original by: Kevin van Zonneveld (https://kvz.io)
//  revised by: Kankrelune (https://www.webfaktory.info/)
//      note 1: Uses an internal counter (in locutus global) to avoid collision
//   example 1: var $id = uniqid()
//   example 1: var $result = $id.length === 13
//   returns 1: true
//   example 2: var $id = uniqid('foo')
//   example 2: var $result = $id.length === (13 + 'foo'.length)
//   returns 2: true
//   example 3: var $id = uniqid('bar', true)
//   example 3: var $result = $id.length === (23 + 'bar'.length)
//   returns 3: true
if (typeof prefix === 'undefined') {
    prefix = ''
  }
let retId
const _formatSeed = function (seed, reqWidth) {
    seed = parseInt(seed, 10).toString(16) // to hex str
if (reqWidth < seed.length) {
// so long we split
return seed.slice(seed.length - reqWidth)
    }
if (reqWidth > seed.length) {
// so short we pad
returnArray(1 + (reqWidth - seed.length)).join('0') + seed
    }
return seed
  }
const $global = (typeofwindow !== 'undefined' ? window : global)
  $global.$locutus = $global.$locutus || {}
const $locutus = $global.$locutus
  $locutus.php = $locutus.php || {}
if (!$locutus.php.uniqidSeed) {
// init seed with big random int
    $locutus.php.uniqidSeed = Math.floor(Math.random() * 0x75bcd15)
  }
  $locutus.php.uniqidSeed++
// start with prefix, add current milliseconds hex string
  retId = prefix
  retId += _formatSeed(parseInt(newDate().getTime() / 1000, 10), 8)
// add seed hex string
  retId += _formatSeed($locutus.php.uniqidSeed, 5)
if (moreEntropy) {
// for more entropy we add a float lower to 10
    retId += (Math.random() * 10).toFixed(8).toString()
  }
return retId
}