PHP's parse_url in JavaScript

module.exports = functionparse_url (str, component) { // eslint-disable-line camelcase
//       discuss at: https://locutus.io/php/parse_url/
//      original by: Steven Levithan (https://blog.stevenlevithan.com)
// reimplemented by: Brett Zamir (https://brett-zamir.me)
//         input by: Lorenzo Pisani
//         input by: Tony
//      improved by: Brett Zamir (https://brett-zamir.me)
//           note 1: original by https://stevenlevithan.com/demo/parseuri/js/assets/parseuri.js
//           note 1: blog post at https://blog.stevenlevithan.com/archives/parseuri
//           note 1: demo at https://stevenlevithan.com/demo/parseuri/js/assets/parseuri.js
//           note 1: Does not replace invalid characters with '_' as in PHP,
//           note 1: nor does it return false with
//           note 1: a seriously malformed URL.
//           note 1: Besides function name, is essentially the same as parseUri as
//           note 1: well as our allowing
//           note 1: an extra slash after the scheme/protocol (to allow file:/// as in PHP)
//        example 1: parse_url('https://user:pass@host/path?a=v#a')
//        returns 1: {scheme: 'https', host: 'host', user: 'user', pass: 'pass', path: '/path', query: 'a=v', fragment: 'a'}
//        example 2: parse_url('https://en.wikipedia.org/wiki/%22@%22_%28album%29')
//        returns 2: {scheme: 'https', host: 'en.wikipedia.org', path: '/wiki/%22@%22_%28album%29'}
//        example 3: parse_url('https://host.domain.tld/a@b.c/folder')
//        returns 3: {scheme: 'https', host: 'host.domain.tld', path: '/a@b.c/folder'}
//        example 4: parse_url('https://gooduser:secretpassword@www.example.com/a@b.c/folder?foo=bar')
//        returns 4: { scheme: 'https', host: 'www.example.com', path: '/a@b.c/folder', query: 'foo=bar', user: 'gooduser', pass: 'secretpassword' }
let query
const mode = (typeofrequire !== 'undefined' ? require('../info/ini_get')('locutus.parse_url.mode') : undefined) || 'php'
const key = [
'source',
'scheme',
'authority',
'userInfo',
'user',
'pass',
'host',
'port',
'relative',
'path',
'directory',
'file',
'query',
'fragment'
  ]
// For loose we added one optional slash to post-scheme to catch file:/// (should restrict this)
let parser = {
php: newRegExp([
'(?:([^:\\/?#]+):)?',
'(?:\\/\\/()(?:(?:()(?:([^:@\\/]*):?([^:@\\/]*))?@)?([^:\\/?#]*)(?::(\\d*))?))?',
'()',
'(?:(()(?:(?:[^?#\\/]*\\/)*)()(?:[^?#]*))(?:\\?([^#]*))?(?:#(.*))?)'
    ].join('')),
strict: newRegExp([
'(?:([^:\\/?#]+):)?',
'(?:\\/\\/((?:(([^:@\\/]*):?([^:@\\/]*))?@)?([^:\\/?#]*)(?::(\\d*))?))?',
'((((?:[^?#\\/]*\\/)*)([^?#]*))(?:\\?([^#]*))?(?:#(.*))?)'
    ].join('')),
loose: newRegExp([
'(?:(?![^:@]+:[^:@\\/]*@)([^:\\/?#.]+):)?',
'(?:\\/\\/\\/?)?',
'((?:(([^:@\\/]*):?([^:@\\/]*))?@)?([^:\\/?#]*)(?::(\\d*))?)',
'(((\\/(?:[^?#](?![^?#\\/]*\\.[^?#\\/.]+(?:[?#]|$)))*\\/?)?([^?#\\/]*))',
'(?:\\?([^#]*))?(?:#(.*))?)'
    ].join(''))
  }
const m = parser[mode].exec(str)
const uri = {}
let i = 14
while (i--) {
if (m[i]) {
      uri[key[i]] = m[i]
    }
  }
if (component) {
return uri[component.replace('PHP_URL_', '').toLowerCase()]
  }
if (mode !== 'php') {
const name = (typeofrequire !== 'undefined' ? require('../info/ini_get')('locutus.parse_url.queryKey') : undefined) || 'queryKey'
    parser = /(?:^|&)([^&=]*)=?([^&]*)/g
    uri[name] = {}
    query = uri[key[12]] || ''
    query.replace(parser, function ($0, $1, $2) {
if ($1) {
        uri[name][$1] = $2
      }
    })
  }
delete uri.source
return uri
}