The storage event will broadcast to any tabs and windows which are open to the same page that a change to the data has occurred. The StorageEvent object has the following properties:
key
oldValue
newValue
url
storage object
Local Storage
Hit Ctrl+Shift+I to open the Developer tools and see the data being set.
Open a new tab instance of this page by clicking this link: Second tab instance
Add a value in this tab and see it reflected in the other
