Vue.js Component Basics Quiz

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Question 1/15

What is a Vue component's 'name' option used for?

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Question 2/15

How would you register a component globally in Vue?
Vue.component('my-component', {
  template: '<div>A custom component!</div>'
});

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Question 3/15

Which directive would you use to conditionally render a piece of element?

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Question 4/15

How does Vue handle directives that are prefixed with 'v-'?

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Question 5/15

How can you centrally manage your application's state in Vue.js?

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Question 6/15

How do you conditionally apply CSS classes in Vue?
<!-- Vue template -->
<div :class="{ active: isActive, 'text-danger': hasError }"></div>

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Question 7/15

What does the 'transition' element do in Vue.js?
<transition name="fade">
  <p v-if="show">Hello</p>
</transition>

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Question 8/15

What attribute is used to ensure keys are unique in lists rendered with 'v-for'?
<li v-for="item in items" :key="item.id">{{ item.name }}</li>

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Question 9/15

How do you create a dynamic component in Vue?
<!-- Vue template -->
<component :is="currentComponent"></component>

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Question 10/15

How do you loop through an array in a Vue template?
<!-- Vue template -->
<ul>
  <li v-for="item in items" :key="item.id">{{ item.name }}</li>
</ul>

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Question 11/15

Which directive is used for conditional rendering in Vue.js?

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Question 12/15

Which directive would you use to two-way bind a data property to an input element?
<!-- Vue template -->
<input v-model="username" />

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Question 13/15

What is a Vuex store used for in a Vue.js application?

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Question 14/15

How do you bind a JavaScript variable to an HTML element in a Vue template?

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Question 15/15

What is a scoped slot in Vue?
<template #default="slotProps">
  <span>{{ slotProps.text }}</span>
</template>

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Your Answers

Question 1/15
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What is a Vue component's 'name' option used for?

Available answers

The 'name' option in a Vue component provides an identifier primarily used for debugging and in tools like Vue DevTools. It also helps with recursive components.
Question 2/15
😊 Your answer was correct 🙁 Your answer was incorrect
How would you register a component globally in Vue?
Vue.component('my-component', {
  template: '<div>A custom component!</div>'
});

Available answers

To register a component globally in Vue, use 'Vue.component()', passing the component's name and its options. This makes the component available throughout the entire application.
Question 3/15
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Which directive would you use to conditionally render a piece of element?

Available answers

The 'v-if' directive is used for conditionally rendering elements. When the condition is false, the element and its children are not rendered.
Question 4/15
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How does Vue handle directives that are prefixed with 'v-'?

Available answers

In Vue.js, directives prefixed with 'v-' are special attributes that apply reactive behavior to the DOM. Examples include 'v-if', 'v-for', and 'v-bind'.
Question 5/15
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How can you centrally manage your application's state in Vue.js?

Available answers

In Vue.js, the centralized state management can be achieved using Vuex, which is an official state management pattern + library for Vue.js applications.
Question 6/15
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How do you conditionally apply CSS classes in Vue?
<!-- Vue template -->
<div :class="{ active: isActive, 'text-danger': hasError }"></div>

Available answers

To conditionally apply CSS classes in Vue, you can use the ':class' binding. The provided code snippet shows how to apply 'active' and 'text-danger' classes based on the 'isActive' and 'hasError' conditions.
Question 7/15
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What does the 'transition' element do in Vue.js?
<transition name="fade">
  <p v-if="show">Hello</p>
</transition>

Available answers

The 'transition' element in Vue.js is used to apply CSS transitions and animations to elements entering or leaving the DOM. The provided snippet wraps a transitioning paragraph with the 'fade' transition.
Question 8/15
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What attribute is used to ensure keys are unique in lists rendered with 'v-for'?
<li v-for="item in items" :key="item.id">{{ item.name }}</li>

Available answers

The ':key' attribute is used in Vue.js with 'v-for' directives to ensure that items have a unique identity. This helps Vue to optimize rendering by detecting changes.
Question 9/15
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How do you create a dynamic component in Vue?
<!-- Vue template -->
<component :is="currentComponent"></component>

Available answers

Dynamic components in Vue are created with the '' syntax. The 'is' attribute determines which component to render, allowing for dynamic rendering based on changing data.
Question 10/15
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How do you loop through an array in a Vue template?
<!-- Vue template -->
<ul>
  <li v-for="item in items" :key="item.id">{{ item.name }}</li>
</ul>

Available answers

The 'v-for' directive in Vue is used to render a list of items by iterating over an array. The code snippet shows how to loop through 'items' and render each 'item'.
Question 11/15
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Which directive is used for conditional rendering in Vue.js?

Available answers

The 'v-if' directive in Vue.js is used to conditionally render elements. It renders an element based on a boolean expression's truthiness.
Question 12/15
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Which directive would you use to two-way bind a data property to an input element?
<!-- Vue template -->
<input v-model="username" />

Available answers

The 'v-model' directive in Vue creates a two-way data binding on form input, textarea, and select elements. The code snippet shows using 'v-model' to bind the 'username' property to an input element.
Question 13/15
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What is a Vuex store used for in a Vue.js application?

Available answers

A Vuex store is a centralized state management solution for Vue.js applications. It allows for managing the global state across components to keep data in sync and consistent.
Question 14/15
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How do you bind a JavaScript variable to an HTML element in a Vue template?

Available answers

In Vue templates, you use the double curly braces ({{ }}) to bind JavaScript expressions to HTML elements. This is known as interpolation.
Question 15/15
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What is a scoped slot in Vue?
<template #default="slotProps">
  <span>{{ slotProps.text }}</span>
</template>

Available answers

A scoped slot is a Vue slot that allows you to pass data from the child component back to the parent using the 'slot-scope' or newer shorthand syntax ('#'). The provided code snippet is an example where 'slotProps.text' is used.