Creating a custom composable in Vue - Quick Revision & Summary

Recall & Review

beginner

What is a custom composable in Vue?

A custom composable is a reusable function that uses Vue's Composition API features like ref or reactive to share logic across components.

beginner

Which Vue API is commonly used inside a custom composable to create reactive state?

The ref API is commonly used to create reactive state inside a custom composable.

beginner

How do you use a custom composable inside a Vue component?

You import the composable function and call it inside the <code>setup()</code> function of your component to access its reactive state and methods.

intermediate

Why create a custom composable instead of putting logic directly in components?

Custom composables help keep code clean and reusable by separating logic from component templates, making it easier to share and maintain.

beginner

What is the file naming convention for a custom composable in Vue?

Custom composables usually start with use (e.g., useCounter.js) to clearly show they are composable functions.

What does a custom composable in Vue return?

A Reactive state and functions

B HTML templates

C CSS styles

D Vue component options

Custom composables return reactive state and functions to be used inside components.

Where do you call a custom composable inside a Vue component?

A Inside the <code>setup()</code> function

B Inside the <code>template</code> section

C Inside the <code>style</code> block

D Outside the component

Custom composables are called inside the setup() function to access their reactive data.

Which Vue API is NOT typically used inside a custom composable?

A <code>ref</code>

B <code>template</code>

C <code>watch</code>

D <code>reactive</code>

The template is part of component structure, not used inside composable functions.

What prefix is recommended for naming custom composables?

A get

B set

C make

D use

Custom composables usually start with "use" to indicate they provide reusable logic.

Why are custom composables helpful in Vue projects?

A They add styles to components

B They generate HTML automatically

C They make logic reusable and easier to maintain

D They replace components

Custom composables help reuse logic and keep code clean and maintainable.

Explain how to create and use a custom composable in Vue.

Think about sharing logic between components using functions.

Why should you use custom composables instead of writing logic directly in components?

Consider how you would share a common feature across many parts of an app.