onUpdated and onBeforeUpdate in Vue - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the lifecycle hook that runs before the component updates.

Vue

import { [1] } from 'vue';

Drag options to blanks, or click blank then click option'

AonMounted

BonBeforeUpdate

ConUpdated

DonCreated

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing onMounted because it runs only once after mounting.

Choosing onUpdated which runs after the update, not before.

The onBeforeUpdate hook runs just before the component updates its DOM.

2fill in blank

medium

Complete the code to import the lifecycle hook that runs after the component updates.

Vue

import { [1] } from 'vue';

Drag options to blanks, or click blank then click option'

AonUpdated

BonUnmounted

ConBeforeUpdate

DonMounted

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing onBeforeUpdate which runs before the update.

Choosing onMounted which runs only once after mounting.

The onUpdated hook runs after the component's DOM has updated.

3fill in blank

hard

Fix the error in the code by choosing the correct lifecycle hook to run code before the DOM updates.

Vue

export default {
  setup() {
    [1](() => {
      console.log('DOM will update soon');
    });
  }
}

Drag options to blanks, or click blank then click option'

AonUpdated

BonMounted

ConUnmounted

DonBeforeUpdate

Attempts:

3 left

💡 Hint

Common Mistakes

Using onUpdated which runs after the DOM updates.

Using onMounted which runs only once after mounting.

onBeforeUpdate runs before the DOM updates, so it is the correct hook here.

4fill in blank

hard

Fill both blanks to correctly use the hooks that run before and after the component updates.

Vue

import { [1], [2] } from 'vue';

export default {
  setup() {
    [1](() => {
      console.log('Before update');
    });
    [2](() => {
      console.log('After update');
    });
  }
}

Drag options to blanks, or click blank then click option'

AonBeforeUpdate

BonMounted

ConUpdated

DonUnmounted

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the hooks' order.

Using onMounted or onUnmounted instead.

onBeforeUpdate runs before the update, and onUpdated runs after the update.

5fill in blank

hard

Fill all three blanks to create a Vue component that logs messages before update, after update, and when mounted.

Vue

import { [1], [2], [3] } from 'vue';

export default {
  setup() {
    [1](() => {
      console.log('Component mounted');
    });
    [2](() => {
      console.log('Before update');
    });
    [3](() => {
      console.log('After update');
    });
  }
}

Drag options to blanks, or click blank then click option'

AonMounted

BonBeforeUpdate

ConUpdated

DonUnmounted

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of hooks.

Using onUnmounted instead of onMounted.

onMounted runs once when the component mounts, onBeforeUpdate runs before each update, and onUpdated runs after each update.