Tell me about lifecycle hooks in Vue 3. In what order are the hooks called for parent and child components during page mounting?

In Vue 3, the component lifecycle includes several hooks that are called in a specific order during creation, updating, and destruction of the component.

When the page is mounted, the hooks for the parent and child components are called in the following order:

1. beforeCreate of the parent
2. created of the parent
3. beforeMount of the parent
4. beforeCreate of the child
5. created of the child
6. beforeMount of the child
7. mounted of the child
8. mounted of the parent

This means that the creation and mounting hooks of the parent are called first, before the child component begins to be created. Then, the child component is created and mounted, after which the parent's mounting process is completed.

This allows the parent to prepare for the creation of child components, and the child components to initialize and render correctly within the parent.

Example of using hooks:

export default {
  beforeCreate() { console.log('beforeCreate'); },
  created() { console.log('created'); },
  beforeMount() { console.log('beforeMount'); },
  mounted() { console.log('mounted'); }
}