Vue.js Composition API Quiz

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Question 1/15

Which feature in the Composition API is designed to control and reuse async logic?

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Question 2/15

Which Composition API feature allows you to reuse logic across components?

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Question 3/15

Which function can be used to stop an effect created with
watchEffect
?

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Question 4/15

How can you create a dynamic component using the Composition API?

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Question 5/15

If you need to initialize a complex object with nested properties in the Composition API, which function should you use?

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Question 6/15

What best describes a `ref` in the Vue Composition API?

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Question 7/15

Which lifecycle hook is NOT available when using the Composition API?

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Question 8/15

Using the Composition API, how can you handle component-specific events, such as a click event?

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Question 9/15

Which method is used to execute a function whenever a dependency changes in the Composition API?

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Question 10/15

What is the main purpose of the Vue Composition API?

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Question 11/15

How do you use props in the setup function?

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Question 12/15

What should be the return type of a `setup` function?

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Question 13/15

What role does the `setup` function play in the Composition API?

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Question 14/15

How can lifecycle hooks be used in a
setup
function?

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Question 15/15

In the Composition API, where does the
setup
function receive the context object from?

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Your Answers

Question 1/15
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Which feature in the Composition API is designed to control and reuse async logic?

Available answers

Composable functions are designed within the Composition API to contain and reuse logic, including asynchronous logic, enabling you to efficiently manage and integrate async operations within your Vue components.
Question 2/15
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Which Composition API feature allows you to reuse logic across components?

Available answers

Composable functions allow logic to be reused across different components in a Vue.js application. They can be created by exporting a function from a file where Composition API features like
ref
,
reactive
, or
watch
are used.
Question 3/15
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Which function can be used to stop an effect created with <pre><code>watchEffect</code></pre>?

Available answers

The
stop
function is used to stop a reactive effect obtained from
watchEffect
. The effect object returned by
watchEffect
contains the
stop
property, used to manually terminate the effect.
Question 4/15
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How can you create a dynamic component using the Composition API?

Available answers

Dynamic components in Vue can be created using the
<component>
HTML element with an
is
attribute. The component specified through the
is
attribute can change based on the state managed in the
setup
function.
Question 5/15
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If you need to initialize a complex object with nested properties in the Composition API, which function should you use?

Available answers

For initializing complex objects with nested properties in the Composition API, the
reactive
function is the appropriate choice, as it provides deep reactivity.
Question 6/15
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What best describes a `ref` in the Vue Composition API?

Available answers

A `ref` is an object that keeps a reactive reference to a primitive value or an object, allowing it to change reactively and can be used in templates directly by accessing
value
in JavaScript.
Question 7/15
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Which lifecycle hook is NOT available when using the Composition API?

Available answers

The
beforeCreate
hook is not available in the Composition API. All hooks are prefixed with
on
, such as
onMounted
or
onBeforeMount
, and they are designed to be used within the
setup
function.
Question 8/15
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Using the Composition API, how can you handle component-specific events, such as a click event?

Available answers

In the Composition API, you can define methods that handle events and return these methods from the
setup
function. These methods can then be assigned to event listeners in the template.
Question 9/15
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Which method is used to execute a function whenever a dependency changes in the Composition API?

Available answers

In the Composition API,
watchEffect
allows developers to run a function whenever its dependencies change, automating side effects tracking.
Question 10/15
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What is the main purpose of the Vue Composition API?

Available answers

The Composition API in Vue.js is primarily designed to organize complex logic and promote reusability of code across components. It allows for more flexible and better-organized code compared to the Options API.
Question 11/15
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How do you use props in the setup function?

Available answers

Props are accessed in the
setup
function through the
props
argument that is passed to it.
Question 12/15
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What should be the return type of a `setup` function?

Available answers

The
setup
function returns an object that includes all the properties and methods to expose to the template, making them accessible within the component's HTML markup.
Question 13/15
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What role does the `setup` function play in the Composition API?

Available answers

The
setup
function is used to set up the component by using the Composition API. It serves as the entry point for defining reactive data, lifecycle hooks, and other logic.
Question 14/15
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How can lifecycle hooks be used in a <pre><code>setup</code></pre> function?

Available answers

In the Composition API, lifecycle hooks such as
onMounted
,
onUpdated
, etc., can be directly used within the
setup
function by calling these hooks with the corresponding lifecycle actions.
Question 15/15
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In the Composition API, where does the <pre><code>setup</code></pre> function receive the context object from?

Available answers

The context object is accessible as the second parameter in the
setup
function, providing access to slots, emit functions, and other options not exposed as part of the first props argument.