The Complete Vue.js Course for Beginners - What Are Lifecycle Hooks in Vue JS?

The video tutorial explains lifecycle hooks in component-based frameworks, detailing each hook's role in managing component data and DOM updates. It covers the sequence of hooks from initialization to unmounting, emphasizing how they facilitate data reactivity and state management. The tutorial provides a comprehensive understanding of hooks like before create, created, before mount, mounted, before update, updated, before unmount, and unmounted, highlighting their significance in ensuring smooth component lifecycle transitions.

What is the primary purpose of lifecycle hooks in a component?

• To create new components

• To observe and compile component data

• To delete component data

• To style components

When is the 'before create' method called?

• Before the instance is initialized

• After the component is mounted

• Before the instance is initialized

• When the component is updated

What happens when the 'created' method is triggered?

• The DOM is updated

• The component is destroyed

• The component is unmounted

• Data becomes reactive and methods become available

What is the role of the 'before mount' method?

• To destroy the component

• To initialize data

• To update the DOM

• To prepare the component for mounting

When is the 'mounted' method executed?

• After the component is mounted

• Before the component is created

• Before the component is destroyed

• After the component is updated

What is the purpose of the 'before update' method?

• To make changes before the DOM tree updates

• To compile component data

• To initialize the component

• To destroy the component

What occurs when the 'unmounted' method is called?

• The component is created

• The component is unmounted

• The component is updated

• The component is mounted