Web Locks API
Coordinate access to resources across multiple tabs or workers with the Web Locks API. Learn to prevent race conditions and ensure data consistency.
Browser Support
Shopping Cart Lock
Prevent shopping cart confusion when users have multiple tabs open. This example shows how to make sure only one tab can update a cart at a time, avoiding situations where items might be added twice or changes could be lost.
Output
Click Run to see output...Document Autosave
Create reliable autosave features that don't conflict with each other. This example shows how to check if a document is already being saved before starting a new save operation, preventing data corruption or unnecessary server requests.
Output
Click Run to see output...Collaborative Editor
Build collaborative tools where many people can view a document at once, but only one person can edit it at a time. This example shows how to allow multiple readers while ensuring exclusive access for writers.
Output
Click Run to see output...