The localStorage and sessionStorage properties allow to save key/value pairs in a web browser. 

localStorage object stores data with no expiration date.The data will not be deleted when the browser is closed, and will be available the next day, week, or year.

The 
Session storage
 — Session storage uses the sessionStorage object to store data on a temporary basis, for a single browser window or tab.

Session storage is destroyed once the user closes the browser whereas, Local storage stores data with no expiration date.