LocalStorage Change Event Example

localStorage change event can be used for some interesting scenarios.

Example 1: Open another tab and communicate back from that as well as close it

(Note: You can open multiple tabs)

Changes done in the other tabs will be shown below

Example 2: Keep track of how long the page was opened for

Enter a valid URL in the field below (e.g. https://www.bing.com)

Duration will be shown below

Note: A simpler example to undestand

Reference: MDN