Example of a function that gets the current URL and parses the query parameters and stores in sessionStorage.

parseParams.js

// Parse query params:
export default () => {
  let finalParams
  try {
    const paramArray = window.location.search.replace('?', '').split('&')
    const params = {}
    paramArray.map((param, i) => {
      if (param) {
        const pair = param.split('=')
        const key = pair[0]
        const val = pair[1]
        params[key] = val
      }
      return param
    })
    if (Object.entries(params).length > 0) {
      sessionStorage.removeItem('params')
      sessionStorage.setItem('params', JSON.stringify(params))
      finalParams = params
    } else {
      const storageParams = sessionStorage.getItem('params')
      const parsedStorage = storageParams ? JSON.parse(storageParams) : null
      finalParams = parsedStorage
    }
  } catch (e) {
    console.log(e)
  }
  return finalParams
}