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Vue.js Directives and Filters Quiz

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Question 1/15

Which directive could you use to toggle an element's presence based on a condition quickly?

Select your answer

v-show

v-once

v-else

v-if

Question 2/15

How can you pass multiple event handlers to a single element in Vue.js?

<div v-on="{ mouseup: onMouseUp, touchend: onTouchEnd }"></div>

Select your answer

Chain multiple v-on directives.

Use an array of methods with v-on.

Bind events directly in the data object.

Declare a watch property for the event.

Question 3/15

Which Vue.js directive allows for two-way data binding between form input and component property?

Select your answer

v-bind

v-model

v-link

v-input

Question 4/15

Which directive helps log events when they occur on an element using Vue.js?

Select your answer

v-debug

v-track

v-on

v-log

Question 5/15

Which Vue.js directive would you use to add a click event on a button?

Select your answer

v-click

v-handle:click

v-event:click

v-on:click

Question 6/15

What is the correct method to parse a list of numbers and double each number using Vue filters?

Vue.filter('double', function(value) {
  return value.map(num => num * 2);
})

Select your answer

Using a filter declared in computed properties.

Using lifecycle hooks to adjust data in place.

Using v-bind and a custom method.

Via the v-model directive directly.

Question 7/15

How does the Vue.js v-for directive work?

Select your answer

It iterates over a collection and renders a template for each item.

It caches data to optimize performance.

It defines a transition or animation between elements.

It binds DOM events to methods using inline declarations.

Question 8/15

Which filter method should you use to convert a string to uppercase in Vue.js?

Vue.filter('capitalize', function(value) {
  return value.toUpperCase();
})

Select your answer

Vue.filter('capitalize', function(value) { return value.toUpperCase(); });

Vue.component('capitalize', { computed: { return value.toUpperCase() } });

Vue.nextTick('capitalize', function(value) { return value.toUpperCase(); });

Vue.data('capitalize', function(value) { return value.toUpperCase(); });

Question 9/15

Which Vue.js directive is appropriate for displaying user-generated HTML content safely?

Select your answer

v-text

v-html

v-bind

v-link

Question 10/15

Which of these is NOT a valid directive in Vue.js?

Select your answer

v-show

v-copy

v-for

v-model

Question 11/15

What is the purpose of v-html in Vue.js?

Select your answer

It inserts HTML into an element, allowing for dynamic rendering.

It parses HTML before displaying it.

It acts as a sanitizer for node text.

It generates documentation for components.

Question 12/15

What is the purpose of the v-if directive in Vue.js?

Select your answer

Bind the value of an input element to a variable.

Render elements conditionally based on the boolean expression.

Listen for DOM events and execute a method.

Repeat a block of elements a specified number of times.

Question 13/15

Which directive would you use to conditionally apply a CSS class to an element in Vue.js?

Select your answer

v-show:class

v-bind:class

v-if:class

v-apply:class

Question 14/15

Which directive allows you to bind an element attribute to a Vue.js variable or expression?

Select your answer

v-on

v-for

v-text

v-bind

Question 15/15

How does the Vue.js v-once directive affect component reactivity?

Select your answer

It updates all properties to static but keeps methods reactive.

It removes the component from the reactivity tracker after the initial render.

It slows down the reactivity system to save resources.

It refreshes the component every second using a timer.

Your Results

You did not answer any questions correctly.

Your Answers

Question 1/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive could you use to toggle an element's presence based on a condition quickly?

Available answers

v-show

v-once

v-else

v-if

v-show

toggles an element using CSS display property, leveraging performance advantages by keeping elements in the DOM.

Question 2/15

😊 Your answer was correct 🙁 Your answer was incorrect

How can you pass multiple event handlers to a single element in Vue.js?

<div v-on="{ mouseup: onMouseUp, touchend: onTouchEnd }"></div>

Available answers

Chain multiple v-on directives.

Use an array of methods with v-on.

Bind events directly in the data object.

Declare a watch property for the event.

With

v-on

, you can bind multiple handlers by using an object syntax, for example, binding both mouse and touch end events.

Question 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which Vue.js directive allows for two-way data binding between form input and component property?

Available answers

v-bind

v-model

v-link

v-input

v-model

provides two-way data binding, commonly used with input elements to synchronize input value with component properties.

Question 4/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive helps log events when they occur on an element using Vue.js?

Available answers

v-debug

v-track

v-on

v-log

v-on

lets you bind event listeners to elements. You can use methods to log events like clicks to the console.

Question 5/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which Vue.js directive would you use to add a click event on a button?

Available answers

v-click

v-handle:click

v-event:click

v-on:click

The

v-on

directive is used to listen for DOM events like clicks. It binds the click event to a Vue method.

Question 6/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the correct method to parse a list of numbers and double each number using Vue filters?

Vue.filter('double', function(value) {
  return value.map(num => num * 2);
})

Available answers

Using a filter declared in computed properties.

Using lifecycle hooks to adjust data in place.

Using v-bind and a custom method.

Via the v-model directive directly.

You can register a filter using

Vue.filter

and apply it in templates with the

operator to transform data such as doubling numbers in a list.

Question 7/15

😊 Your answer was correct 🙁 Your answer was incorrect

How does the Vue.js v-for directive work?

Available answers

It iterates over a collection and renders a template for each item.

It caches data to optimize performance.

It defines a transition or animation between elements.

It binds DOM events to methods using inline declarations.

v-for

is used to render a list of items by iterating over an array or object and allows access to each item and its index during iteration.

Question 8/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which filter method should you use to convert a string to uppercase in Vue.js?

Vue.filter('capitalize', function(value) {
  return value.toUpperCase();
})

Available answers

Vue.filter('capitalize', function(value) { return value.toUpperCase(); });

Vue.component('capitalize', { computed: { return value.toUpperCase() } });

Vue.nextTick('capitalize', function(value) { return value.toUpperCase(); });

Vue.data('capitalize', function(value) { return value.toUpperCase(); });

Vue provides a way to define filters such as

Vue.filter('capitalize', function(value) { return value.toUpperCase(); });

to change the format or style of text.

Question 9/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which Vue.js directive is appropriate for displaying user-generated HTML content safely?

Available answers

v-text

v-html

v-bind

v-link

v-html

enables you to insert raw HTML for dynamic rendering. Caution is advised to sanitize input to prevent XSS.

Question 10/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which of these is NOT a valid directive in Vue.js?

Available answers

v-show

v-copy

v-for

v-model

v-copy

is not a valid directive in Vue.js. The valid directives are

v-if

v-for

v-model

v-show

, etc.

Question 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the purpose of v-html in Vue.js?

Available answers

It inserts HTML into an element, allowing for dynamic rendering.

It parses HTML before displaying it.

It acts as a sanitizer for node text.

It generates documentation for components.

The

v-html

directive is used to insert raw HTML into an element. However, caution is advised as it may expose the application to XSS attacks.

Question 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the purpose of the v-if directive in Vue.js?

Available answers

Bind the value of an input element to a variable.

Render elements conditionally based on the boolean expression.

Listen for DOM events and execute a method.

Repeat a block of elements a specified number of times.

v-if

is a directive in Vue.js used to render elements based on a true or false condition. If the condition evaluates to true, the element is rendered, otherwise, it is not.

Question 13/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive would you use to conditionally apply a CSS class to an element in Vue.js?

Available answers

v-show:class

v-bind:class

v-if:class

v-apply:class

v-bind:class

allows for binding a CSS class conditionally based on the return value of a JavaScript expression.

Question 14/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive allows you to bind an element attribute to a Vue.js variable or expression?

Available answers

v-on

v-for

v-text

v-bind

v-bind

is used to bind HTML attribute values to data properties or computed properties in Vue.js.

Question 15/15

😊 Your answer was correct 🙁 Your answer was incorrect

How does the Vue.js v-once directive affect component reactivity?

Available answers

It updates all properties to static but keeps methods reactive.

It removes the component from the reactivity tracker after the initial render.

It slows down the reactivity system to save resources.

It refreshes the component every second using a timer.

v-once

makes an element unreactive after the initial render, preserving the performance of static content.