578 CHAPTER 15 Local data with web storage
Suggested practice exercises
The following additional exercises are designed to give you more opportunities to practice
what you’ve learned and to help you successfully master the lessons presented in this chapter.
■■Exercise 1 Modify the contact list to use sessionStorage instead of localStorage.
Notice that your list is cleared after the browser window is closed.
■■Exercise 2 Subscribe to the storage event and display an alert message each time a
value is updated. Test this by using a second browser tab.