Vue.js 3 and Firebase for Beginners - Unsubscribing from Updates

The video tutorial explains how to manage resources by detaching listeners when they are no longer needed. It introduces the unsubscribe method returned by onSnapshot, which can be stored in a variable for later use. A practical example in an admin context is provided, where listeners for current orders are detached when navigating away from the page. The tutorial also covers creating a ref to store the unsubscribe function and using lifecycle hooks like onUnmounted to ensure proper cleanup.

What is the purpose of the unsubscribe method mentioned in the text?

Explain how to detach a listener when it is no longer needed.

Describe the process of storing the unsubscribe function in a variable.

What is the significance of the on unmounted lifecycle hook?

How can you test if the unsubscribe function is working correctly?