urlQuery.js

function parseQuery () {
  var search = window.location.search
  if (search) {
    search = search.substr(1)
    let args = search.split('&')
    let query = {}
    args.forEach(pair => {
      let arr = pair.split('=')
      let key = arr.shift()
      let value = arr.join('=')
      query[key] = decodeURIComponent(value)
    })

    return query
  }

  return {}
}

function formQuery (query) {
  let arr = []
  for (let key in query) {
    let value = query[key]
    arr.push(`${key}=${encodeURIComponent(value)}`)
  }
  let search = arr.join('&')
  if (search) {
    return '?' + search
  }
  return ''
}

export default {
  parseQuery,
  formQuery
}