Get query parameter from the url

getQueryParam.js

var getQueryParam = function getQueryParam (param) {
  var queries = window.location.search, regex, resRegex, results, response;
  param = encodeURIComponent(param);
  regex = new RegExp('[\\?&]' + param + '=([^&#]*)', 'g');
  resRegex = new RegExp('(.*)=([^&#]*)');
  results = queries.match(regex);
  
  if (!results) {
	  return '';
  }
  response = results.map(function (result) {
    var parsed = resRegex.exec(result);
    
    if (!parsed) {
      return '';
    }
	
    return parsed[2].match(/(^\d+$)/) ? Number(parsed[2]) : parsed[2];
  })
  
  return response.length > 1 ? response : response[0];
};