With web storage, web applications can store data locally within the user's browser. Unlike cookies, the storage limit is far larger (at least 5MB) and information is never transferred to the server. Web storage is per origin (per domain and protocol). All pages, from one origin, can store and access the same data.
The localStorage object stores the 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 sessionStorage object is equal to the localStorage object, except that it stores
the data for only one session. The data is deleted when the user closes the
specific browser tab.
The following example counts the number of times a user has clicked a button, in the current session:
Click the button to see the counter increase.
Close the browser tab (or window), and try again, and the counter is reset.