Parses QueryString and returns URL agruments.

QueryStrings.js

function GetQueryString( qs ) {
  if ( !qs ) return;
  var QueryStrings = [];
  var SearchParams = new URLSearchParams( qs );
  for ( Query of SearchParams ) {
    QueryStrings.push( Query );
  }

  function EntriesToObject( Entries ) {
    if ( Array.isArray( Entries ) ) {
      var EntriesObject = {};
      Entries.forEach( entry => {
        EntriesObject[ entry[ 0 ] ] = entry[ 1 ];
      } );
      return EntriesObject;
    }
  }

  QueryStrings = EntriesToObject( QueryStrings );
}

Usage

Takes qs argument as QueryString. Otherwise returns nothing.

var QueryString = ParseQueryString(location.search); /** URL QueryString **/
console.log(QueryString) /** TypeOf Object **/

Note: This API is new mayn't be supported in older Web browsers. Use pollyfill.

This also could be done using:

var searchParams = 
new URL(location.href)
.searchParams;

// This is how you do it!
var params = 
Array.from(searchParams.entries())
.reduce((accum, [k, v]) => {
  accum[k] = v;
  return accum;
}, {});

Thanks to this StackOverflow answer.