The Modern JavaScript Bootcamp (2019) - Syncing Data Across Pages

The video tutorial explains how to synchronize data across multiple browser tabs using local storage and the window object. It covers the properties of the window object, setting up event listeners, and using the storage event to update the user interface in real-time. The tutorial demonstrates how to handle data changes and ensure that users always see the most current information, even when working across different tabs or windows.

What is the primary purpose of listening for changes in local storage?

• To enhance security

• To save data permanently

• To sync data across multiple tabs

• To increase browser speed

Which global object in the browser allows access to properties like height and width?

• screen

• document

• window

• navigator

What is the purpose of the 'storage' event in the context of local storage?

• To backup data in local storage

• To encrypt data in local storage

• To notify when data in local storage changes

• To delete data from local storage

When does the storage event fire?

• On all open tabs

• On the page that changes local storage

• Only on other pages that did not change local storage

• On the server

What is the first step in handling a storage event?

• Log the event to the console

• Alert the user

• Parse the new data from the event

• Refresh the page

What should be done if the key that changed is not the one of interest?

• Alert the user

• Refresh the page

• Log an error

• Ignore the event

What is the purpose of using JSON.parse in the context of the storage event?

• To convert data to a string

• To encrypt the data

• To parse the new value from local storage

• To delete the old data

What is a potential issue with having duplicate code in event handling?

• It makes the code run faster

• It improves readability

• It enhances security

• It can lead to inconsistent behavior

What is the expected behavior when a note is deleted in one tab?

• The page crashes

• The note is deleted in all tabs

• The note is archived

• The note remains visible in other tabs

What is the main benefit of using the storage event for syncing data?

• It speeds up data retrieval

• It increases data security

• It ensures users see the most current data

• It reduces server load