sessionStorage for login code example

Example: sessionstorage

sessionStorage is like localStorage
except that it is cleared when the page session ends meaning when you close 
your chrome tab or any other browser tab

usage methods

// Save data to sessionStorage
sessionStorage.setItem('key', 'value');

// Get saved data from sessionStorage
let data = sessionStorage.getItem('key');

// Remove saved data from sessionStorage
sessionStorage.removeItem('key');

// Remove all saved data from sessionStorage
sessionStorage.clear();