Nuxt•4mo ago

country picker input

in the nuxt ui docs there's a country picker example which lazy loads the countries from /api/countries.json i want a country picker in my form in a modal which is rarely opened. should i just keep the countries list in the component directly or is this a better approach like in the docs where they're lazy loaded from the server route? what are the pros and cons in this context I feel like storing them directly in the component would be faster not requiring that api call?

17 Replies

kapa.ai•4mo ago

Hi @WiFi Plug. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- If your country picker is inside a modal that is rarely opened, both approaches—storing the country list directly in the component or lazy loading from an API—are valid, but each has trade-offs: Storing Countries Directly in the Component Pros: - Instant availability: No network request is needed, so the list appears immediately when the modal opens. - Simplicity: No need to manage loading states or handle API errors. - No extra server load: Reduces backend/API calls. Cons: - Bundle size: If the country list is large, it increases your JavaScript bundle size, even for users who never open the modal. - Static data: If country data changes, you must redeploy your app to update it. Lazy Loading from an API (as in the docs) Pros: - Smaller initial bundle: The country data is only fetched when needed, keeping your main bundle lighter, which can improve initial load performance. - Fresh data: You can update the country list on the server without redeploying your app. - Efficient for rarely used features: If most users never open the modal, they never download the country data. Cons: - Slight delay: The first time the modal is opened, users may see a loading state while the data is fetched. - Complexity: You need to handle loading and error states in your UI. - Requires API endpoint: You must maintain an endpoint (like /api/countries.json). Nuxt UI Docs Example The Nuxt UI docs demonstrate lazy loading with useLazyFetch and only fetching countries when the menu is opened, which is ideal for rarely used or large datasets:

const { data: countries, status, execute } = await useLazyFetch('/api/countries.json', {
  immediate: false
})
function onOpen() {
  if (!countries.value?.length) {
    execute()
  }
}

const { data: countries, status, execute } = await useLazyFetch('/api/countries.json', {
  immediate: false
})
function onOpen() {
  if (!countries.value?.length) {
    execute()
  }
}

<USelectMenu
  :items="countries"
  :loading="status === 'pending'"
  @update:open="onOpen"
  ...
/>

<USelectMenu
  :items="countries"
  :loading="status === 'pending'"
  @update:open="onOpen"
  ...
/>

See the full example in the docs Recommendation - If your country list is small and unlikely to change, storing it directly in the component is simpler and provides instant UX. - If the list is large, may change, or you want to optimize your initial bundle size, lazy loading as shown in the docs is better, especially since the modal is rarely opened. Both approaches are valid; choose based on your priorities for bundle size, data freshness, and user experience for the modal. The Nuxt UI docs recommend lazy loading for rarely used or large datasets for optimal performance and flexibilitySelectMenu CountryPicker Example. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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WiFi PlugOP•4mo ago

@kapa.ai do you know if the countries.json file is available to download? and then what does that server route look like to server this json?

kapa.ai•4mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The knowledge sources do not specify whether a ready-made countries.json file is available to download. The Nuxt UI documentation example assumes you have a /api/countries.json endpoint, but it does not provide the actual JSON file or its contents. To serve a countries.json file in your Nuxt app, you can create a server route in the server/api/ directory. For example, you could create a file at server/api/countries.json.ts with the following content:

export default defineEventHandler(() => [
  { name: 'United States', code: 'US', emoji: '🇺🇸' },
  { name: 'Canada', code: 'CA', emoji: '🇨🇦' },
  // ...add more countries as needed
])

export default defineEventHandler(() => [
  { name: 'United States', code: 'US', emoji: '🇺🇸' },
  { name: 'Canada', code: 'CA', emoji: '🇨🇦' },
  // ...add more countries as needed
])

This will make the country list available at /api/countries.json in your app, matching the usage in the Nuxt UI docs example. You can customize the list as needed for your applicationAs a CountryPicker. If you need a comprehensive list of countries, you would need to source or generate the JSON data yourself, as the knowledge sources do not provide a downloadable file. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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WiFi PlugOP•4mo ago

@kapa.ai are you sure this is correct? i put this in my api/countries.json.ts "export default defineEventHandler(() => [ { name: 'United States', code: 'US', emoji: '🇺🇸' }, { name: 'Canada', code: 'CA', emoji: '🇨🇦' }, // ...add more countries as needed ])" but it's not loading any countries so just want to double check

kapa.ai•4mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Yes, the approach of creating a server route like server/api/countries.json.ts and exporting a handler that returns an array of country objects is correct according to the Nuxt documentation for API routes. Here’s an example from the docs for a similar API route:

// server/api/hello.ts
export default defineEventHandler((event) => {
  return {
    hello: 'world'
  }
})

// server/api/hello.ts
export default defineEventHandler((event) => {
  return {
    hello: 'world'
  }
})

This means your code:

export default defineEventHandler(() => [
  { name: 'United States', code: 'US', emoji: '🇺🇸' },
  { name: 'Canada', code: 'CA', emoji: '🇨🇦' },
  // ...add more countries as needed
])

export default defineEventHandler(() => [
  { name: 'United States', code: 'US', emoji: '🇺🇸' },
  { name: 'Canada', code: 'CA', emoji: '🇨🇦' },
  // ...add more countries as needed
])

should work and make the data available at /api/countries.json in your Nuxt app, as long as the file is placed in the correct directory (server/api/) and your Nuxt server is running. You can test this by visiting <http://localhost:3000/api/countries.json> in your browser or using a tool like curl or Postman. If you see the JSON array, the route is working as expected server directory structure. If it’s not working: - Double-check the file location: it must be in server/api/ and named countries.json.ts. - Make sure your Nuxt server is running and there are no build errors. - Check your browser console or server logs for any errors. If you’re still not seeing the data, the knowledge sources do not provide further troubleshooting steps, but the structure and approach are correct per the official Nuxt documentation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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WiFi PlugOP•4mo ago

@kapa.ai Server Error Invalid lazy handler result. It should be a function:

kapa.ai•4mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The error message "Invalid lazy handler result. It should be a function" indicates that the server expects the default export of your API route file to be a function (specifically, an event handler), not a plain array or object. According to the Nuxt documentation, each file in server/api/ should export a default function defined with defineEventHandler() or eventHandler() (alias), which returns the data you want to serve. Here’s the correct pattern:

// server/api/countries.json.ts
export default defineEventHandler(() => {
  return [
    { name: 'United States', code: 'US', emoji: '🇺🇸' },
    { name: 'Canada', code: 'CA', emoji: '🇨🇦' },
    // ...add more countries as needed
  ]
})

// server/api/countries.json.ts
export default defineEventHandler(() => {
  return [
    { name: 'United States', code: 'US', emoji: '🇺🇸' },
    { name: 'Canada', code: 'CA', emoji: '🇨🇦' },
    // ...add more countries as needed
  ]
})

Make sure you are returning the array from inside the function, not directly exporting the array itself. This matches the documented approach for Nuxt server API routes server directory structure. If you follow this structure, the error should be resolved. If you still encounter issues, double-check that the file is in the correct directory and that your Nuxt server is running without build errors. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

<@679734274840330384> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

WiFi PlugOP•4mo ago

@kapa.ai can i make the <UInputMenu optional? my zod validation makes it optional but once i click an option i can't clear it if i delete it just reverts to my last choice?

kapa.ai•4mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The knowledge sources do not explicitly mention a built-in way to clear the selection in <UInputMenu> (such as a clear button or allowing an empty value) for making the field optional. The documentation shows how to use v-model to control the value, but does not provide an example for clearing the selection or handling an "empty" state after a value has been chosen InputMenu Usage. If your Zod validation allows the field to be optional, but the UI does not let you clear the selection, you may need to implement a custom solution, such as adding a "Clear" or "None" option to your items array, or using a custom trailing slot with a button to set the value to null or undefined. However, the knowledge sources do not provide a documented example of this pattern. I'm sorry, but there's no information in the provided knowledge sources about making <UInputMenu> optional with a built-in clear feature. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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WiFi PlugOP•4mo ago

@kapa.ai nuxt ui is the input menu with type="date" meant to work on mobile? it looks good on desktop but on mobile it vanishes on ios and looks mediocre on android

kapa.ai•4mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I'm sorry, but the knowledge sources do not provide any information about using <UInputMenu> with type="date" or its behavior on mobile devices, including iOS or Android. There is no mention of mobile-specific support, issues, or recommendations for date input types with <UInputMenu> in the provided documentation. If you are experiencing issues, it may be necessary to test alternative approaches or consult the official Nuxt UI repository for further guidance, as this specific use case is not covered in the available sources. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

<@679734274840330384> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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