Which method is used to clear all data in the browser's local storage?

The method used to clear all data in the browser's local storage is indeed localStorage.clear(). This method effectively removes all key-value pairs stored in the local storage for the domain that the code is executed on.

When localStorage.clear() is called, it ensures that every individual item stored in the local storage is deleted, leaving the storage empty. This is particularly useful when you want to reset the local storage state or when user action requires removing all stored information, such as logging out from a session.

The other methods mentioned do not exist or do not fulfill the purpose of clearing all data from local storage. For example, localStorage.remove() would not function because it doesn't exist as a method, while localStorage.deleteAll() and localStorage.empty() are also not defined methods within the local storage API. Thus, localStorage.clear() stands out as the sole correct option for clearing all local storage entries.