Read session storage value from another tab that is the opener

window.opener.sessionStorage.js

function getSessionItem(key, remove) {
  if (!key) {
    throw new Error(`invalid key: ${key}`);
  }
  if (remove === undefined) {
    remove = true;
  }
  let o = window.sessionStorage.getItem(key);
  if (!o && window.opener) {
    o = window.opener.sessionStorage.getItem(key);
  }

  if (window.opener && remove) {
    window.opener.sessionStorage.removeItem(key);
  }

  return o || undefined;
}

function setSessionItem(key, value) {
  if (!key) {
    throw new Error(`invalid key: ${key}`);
  }
  window.sessionStorage.setItem(key, value);
}