ES5 and 6 functions to parse URIs mostly following the RFC 1738 spec

parse-uri-es6.js

/*jshint asi:true */

;(function(global) {
  'use strict'

  const parser = /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
        queryKeyParser = /(?:^|&)([^&=]*)=?([^&]*)/g,
        keys = "href protocol authority userInfo user password host port relative path directory file query anchor".split(" ");

  /**
   * Creates a function parse_uri that takes a URL and parses it into
   * its various components e.g. protocol, host, username, password,
   * path, query etc. Takes a URL string to process, if none is passed
   * it processes location.href by default.
   */
  global.parseUri = uri => {
    let href = uri || location.href,
        m = parser.exec(href),
        uriinfo = {
          params: {}
        }

    keys.forEach((key, idx) => {
      uriinfo[key] = m[idx] || ""
    })

    uriinfo.query.replace(queryKeyParser, (match, name, value) => {
      /*jshint unused:false */

      if (name) {
        value = decodeURIComponent(value)
        uriinfo.params[name] = parseFloat(value) || value
      }
    });

    return uriinfo;
 }

})(window)

parse-uri.js

/*jshint asi:true */

; (function(global) {
  'use strict'

  var parser = /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
    queryKeyParser = /(?:^|&)([^&=]*)=?([^&]*)/g,
    keys = "href protocol authority userInfo user password host port relative path directory file query anchor".split(" ");


  /**
   * Creates a function parse_uri that takes a URL and parses it into
   * its various components e.g. protocol, host, username, password,
   * path, query etc. Takes a URL string to process, if none is passed
   * it processes location.href by default.
   */
  global.parseUri = function(uri) {
    var href = uri || location.href,
      m = parser.exec(href),
      uriinfo = {
        params: {}
      }
 
    keys.forEach(function(key, idx) {
      uriinfo[key] = m[idx] || ""
    });
 
    uriinfo.query.replace(queryKeyParser, function(match, name, value) {
      /*jshint unused: false */
      
      if (name) {
        value = decodeURIComponent(value)
        uriinfo.params[name] = parseFloat(value) || value
      }
    })
 
    return uriinfo
  }
  
})(window)