ES6 friendly function to retrieve url parameters as an Object.

getUrlParamsObj.js

const getUrlParamsObj = (queryString) => {
  const paramsArray = (window.location.search.charAt(0) === "?")
    ? window.location.search.substr(1).split('&')
    : window.location.search.split('&')

  return paramsArray.reduce((mainObj, val) => {
    const valArray = val.split('=')
    return Object.assign(mainObj, {[valArray[0]]: valArray[1]})
  }, {})
}