v-once for static content in Vue - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to render static content only once using Vue's directive.

Vue

<div [1]>
  <p>This content will not update.</p>
</div>

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

Av-if

Bv-once

Cv-for

Dv-bind

Attempts:

3 left

💡 Hint

Common Mistakes

Using v-if instead of v-once causes conditional rendering, not static rendering.

Using v-for is for lists, not static content.

Using v-bind is for binding attributes, not controlling rendering.

The v-once directive tells Vue to render the element and its children only once, skipping future updates.

2fill in blank

medium

Complete the code to apply v-once to a component's root element.

Vue

<template>
  <section [1]>
    <h1>Welcome</h1>
  </section>
</template>

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

Av-once

Bv-show

Cv-model

Dv-if

Attempts:

3 left

💡 Hint

Common Mistakes

Using v-if will conditionally render but not prevent updates.

v-show toggles visibility but still updates the DOM.

v-model is for two-way binding, not rendering control.

Applying v-once on the root element ensures the whole section renders only once.

3fill in blank

hard

Fix the error in the code to correctly use v-once on a list item.

Vue

<ul>
  <li v-for="item in items" [1]>{{ item.name }}</li>
</ul>

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

Av-if

Bv-bind

Cv-once

Dv-model

Attempts:

3 left

💡 Hint

Common Mistakes

Using v-if inside v-for can cause unexpected behavior.

v-bind is for binding attributes, not controlling rendering.

v-model is unrelated to rendering control.

Using v-once on each list item renders them once and skips updates, which is useful for static lists.

4fill in blank

hard

Fill both blanks to create a static list where each item renders only once.

Vue

<ul>
  <li v-for="item in items" :key="BLANK_1" {{BLANK_2}}>{{ item.text }}</li>
</ul>

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

Aitem.id

Bv-once

Citem.name

Dv-if

Attempts:

3 left

💡 Hint

Common Mistakes

Using v-if instead of v-once will not prevent re-rendering.

Using item.name as key may not be unique.

Omitting the key causes Vue to warn about list rendering.

Using :key="item.id" helps Vue track list items, and v-once ensures each item renders only once.

5fill in blank

hard

Fill all three blanks to optimize static content rendering with v-once and unique keys.

Vue

<template>
  <div>
    <article v-for="post in posts" :key="BLANK_1" [2]>
      <h2>{{ post.title }}</h2>
      <p>{{ post.content }}</p>
    </article>
    <footer>{{BLANK_3}}</footer>
  </div>
</template>

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

Apost.id

Bv-once

Cnew Date().getFullYear()

Dv-if

Attempts:

3 left

💡 Hint

Common Mistakes

Using v-if instead of v-once for static rendering.

Using a non-unique key causes rendering issues.

Not using JavaScript expression for dynamic footer content.

Use post.id as a unique key, v-once to render articles once, and display the current year in the footer.