Suspense for async components in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of <Suspense> in Vue?

The <Suspense> component lets Vue show a fallback UI while waiting for async components or async setup to finish loading. It improves user experience by showing a loading state instead of a blank screen.

beginner

How do you define an async component in Vue to use with <Suspense>?

You define an async component by using defineAsyncComponent or a dynamic import. For example: const AsyncComp = defineAsyncComponent(() => import('./MyComponent.vue')).

intermediate

What happens if an async component inside <Suspense> fails to load?

If an async component fails to load, <Suspense> can show an error fallback if provided, or the error will propagate. You can handle errors by using errorCaptured lifecycle hook or error slots in <Suspense>.

intermediate

Can <Suspense> handle multiple async components at once?

Yes, <Suspense> waits for all async components inside it to resolve before showing the main content. Until then, it shows the fallback UI.

beginner

What is the role of the fallback slot in <Suspense>?

The fallback slot defines what the user sees while async components are loading. It usually contains a loading spinner or message to indicate progress.

What does the <Suspense> component show while waiting for async components?

A The fallback slot content

B The main component content

C An error message

D Nothing, it stays blank

shows the fallback slot content while async components are loading.

How do you create an async component in Vue to use with <Suspense>?

A Using a computed property

B Using v-if directive

C Using a synchronous import

D Using defineAsyncComponent or dynamic import

Async components are created with defineAsyncComponent or dynamic import to load them lazily.

If multiple async components are inside one <Suspense>, when does it show the main content?

A Never, it always shows fallback

B After the first async component loads

C After all async components finish loading

D Immediately without waiting

waits for all async components inside it to resolve before showing main content.

What slot do you use inside <Suspense> to show a loading spinner?

A error

B fallback

C default

D loading

The fallback slot is used to show loading UI while waiting for async components.

How can you handle errors from async components inside <Suspense>?

A Using errorCaptured hook or error slot

B Using v-show directive

C Using a try-catch block in template

D You cannot handle errors in <Suspense>

Errors can be handled with errorCaptured lifecycle hook or error slot inside .

Explain how improves user experience when loading async components in Vue.

Think about what users see during loading.

Describe how to define and use an async component with in Vue.

Focus on component creation and template usage.