utility functions for query strings in javascript

queryString.js

function serializeQuery (queryObj) {
  return '?' + Object.keys(queryObj)
    .reduce(function (r, q) {
      r.push(encodeURIComponent(q) + '=' + encodeURIComponent(queryObj[q]))
      return r
    }, [])
    .join('&')
}

function readQuery (queryStr_) {
  let queryStr = queryStr_[0] === '?' ? queryStr_.slice(1) : queryStr_
  return queryStr.split('&')
  .map(function (n) {
    return n.split('=')
  })
  .reduce(function (x, y) {
    return Object.assign(x, {
      [decodeURIComponent(y[0])]: decodeURIComponent(y[1] || '')
    })
  }, {})
}