JavaScript expressions in templates in Vue - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to display the value of message inside the template.

Vue

<template>
  <p>{{ [1] }}</p>
</template>

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

Amsg

Bmessage

Ctext

Dcontent

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name that is not defined in the component.

Forgetting to use double curly braces for interpolation.

The double curly braces {{ }} in Vue templates are used to display JavaScript expressions. Here, message is the correct variable to show.

2fill in blank

medium

Complete the code to show the length of the items array in the template.

Vue

<template>
  <p>Total items: {{ [1] }}</p>
</template>

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

Aitems.count

Bitems.size

Citems.length

Ditems.total

Attempts:

3 left

💡 Hint

Common Mistakes

Using count or size which are not valid array properties in JavaScript.

Trying to call length() as a function.

In JavaScript, arrays have a length property that gives the number of elements.

3fill in blank

hard

Fix the error in the template expression to correctly show the uppercase version of name.

Vue

<template>
  <p>{{ name.[1]() }}</p>
</template>

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

AtoUpperCase

Buppercase

CtoUppercase

DUpperCase

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect capitalization like toUppercase or uppercase.

Forgetting the parentheses to call the method.

The correct JavaScript string method to convert text to uppercase is toUpperCase() with a capital C.

4fill in blank

hard

Fill both blanks to create a computed property that returns the doubled value of count.

Vue

<script setup>
import { computed } from 'vue'
const count = ref(5)
const doubleCount = computed(() => count[1][2])
</script>

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

A*

B+

C2

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition instead of multiplication.

Using the variable name count again instead of a number.

To double a number, multiply it by 2 using the * operator and the number 2.

5fill in blank

hard

Fill all three blanks to create a template expression that shows the first item in items in uppercase.

Vue

<template>
  <p>{{ items[1] [2] [3]() }}</p>
</template>

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

A[0]

B.charAt

C.toUpperCase

D.slice

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to access the first item before calling string methods.

Using incorrect method names or missing parentheses.

To get the first item, use [0]. To get the first letter, use .slice(0,1) or .charAt(0). Then convert it to uppercase with .toUpperCase(). Here, .slice and .toUpperCase are used as methods.