// app/sections/featured-collection/index.tsximport type { ComponentLoaderArgs } from '@weaverse/hydrogen'
// Define the expected input data typetype FeaturedCollectionData = {  collection: { handle: string }}
// Component implementation...
// Define the loader function to fetch dataexport let loader = async (args: ComponentLoaderArgs<FeaturedCollectionData>) => {  const { weaverse, data } = args  const { storefront } = weaverse    // Access component settings through the data parameter  const { collection } = data    // Fetch and return the data  return await storefront.query(COLLECTION_QUERY, {    variables: {      handle: collection.handle    }  })}

import type { ComponentLoaderArgs } from '@weaverse/hydrogen'import type { CollectionQuery } from 'storefrontapi.generated'
// Define input data shapetype FeaturedCollectionData = {  collection: { handle: string }  productsToShow: number}
// Define what the loader returns (will be available as props.loaderData)type LoaderReturnType = {  collection: CollectionQuery['collection']}
export let loader = async (  args: ComponentLoaderArgs<FeaturedCollectionData>): Promise<LoaderReturnType | null> => {  // Implementation...}

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<ProductData>) => {  const { storefront } = weaverse  const { product } = data    if (!product?.handle) return null    return await storefront.query(PRODUCT_QUERY, {    variables: {      handle: product.handle,      language: storefront.i18n.language,      country: storefront.i18n.country    }  })}
// GraphQL query defined elsewhereconst PRODUCT_QUERY = `#graphql  query Product($handle: String!, $language: LanguageCode, $country: CountryCode)  @inContext(language: $language, country: $country) {    product(handle: $handle) {      id      title      description      # Other fields...    }  }` as const

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<WeatherWidgetData>) => {  const { fetchWithCache, env } = weaverse  const { location = 'New York' } = data    try {    return await fetchWithCache(`https://api.weather.example/forecast`, {      method: 'POST',      headers: {        'Content-Type': 'application/json',        'API-Key': env.WEATHER_API_KEY      },      body: JSON.stringify({ location }),      // Use built-in caching      strategy: weaverse.storefront.CacheShort()    })  } catch (error) {    console.error('Weather API error:', error)    return { error: true, forecast: [] }  }}

type MapComponentData = {  latitude: number  longitude: number  zoom: number  showTraffic: boolean  mapStyle: 'standard' | 'satellite' | 'terrain'}
export let loader = async ({ weaverse, data }: ComponentLoaderArgs<MapComponentData>) => {  const { fetchWithCache, env } = weaverse  const { latitude, longitude, zoom, showTraffic, mapStyle } = data    // Use component settings to customize the API request  return await fetchWithCache(    `https://api.maps.example/staticmap?lat=${latitude}&lng=${longitude}&zoom=${zoom}&traffic=${showTraffic}&style=${mapStyle}&key=${env.MAPS_API_KEY}`  )}

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<ProductData>) => {  const { storefront } = weaverse  const { productHandle } = data    return await storefront.query(PRODUCT_QUERY, {    variables: { handle: productHandle }  })}

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<TestimonialData>) => {  const { storefront, fetchWithCache, env } = weaverse  const { source, productHandle, collectionHandle } = data    // Choose data source based on component settings  switch (source) {    case 'product-reviews':      return await fetchWithCache(`https://api.reviews.example/product/${productHandle}`, {        headers: { 'API-Key': env.REVIEWS_API_KEY }      })        case 'collection-reviews':      return await fetchWithCache(`https://api.reviews.example/collection/${collectionHandle}`, {        headers: { 'API-Key': env.REVIEWS_API_KEY }      })        case 'store-testimonials':      return await storefront.query(TESTIMONIALS_QUERY)          default:      return { testimonials: [] }  }}

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<ProductDetailData>) => {  const { storefront, fetchWithCache, env } = weaverse  const { productHandle } = data    // Fetch from multiple sources simultaneously  const [productData, reviewsData, inventoryData] = await Promise.all([    // Product data from Shopify    storefront.query(PRODUCT_QUERY, {      variables: { handle: productHandle }    }),        // Reviews from third-party API    fetchWithCache(`https://api.reviews.example/products/${productHandle}`, {      headers: { 'Authorization': `Bearer ${env.REVIEWS_API_KEY}` }    }),        // Inventory data from ERP system    fetchWithCache(`https://api.inventory.example/stock-levels`, {      method: 'POST',      headers: { 'API-Key': env.INVENTORY_API_KEY },      body: JSON.stringify({ sku: productHandle })    })  ])    // Combine the results  return {    product: productData.product,    reviews: reviewsData.reviews || [],    inventory: inventoryData.stockLevels || {}  }}

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<NewsData>) => {  const { fetchWithCache } = weaverse  const { source, category, count = 3 } = data    try {    const response = await fetchWithCache(      `https://api.news.example/${source}?category=${category}&count=${count}`    )        // Validate the response    if (!response || !Array.isArray(response.articles)) {      console.warn('News API returned invalid data format')      return { articles: [], error: 'invalid_format' }    }        return {       articles: response.articles,      error: null    }  } catch (error) {    console.error('News API error:', error)        // Return structured error data for the component to handle    return {       articles: [],      error: error instanceof Error ? error.message : 'unknown_error'    }  }}

export let loader = async ({ weaverse, data }: ComponentLoaderArgs<RelatedProductsData>) => {  const { storefront } = weaverse  const { productHandle } = data    // Step 1: Get the main product to find its type  const { product } = await storefront.query(PRODUCT_BASIC_QUERY, {    variables: { handle: productHandle }  })    if (!product) return { relatedProducts: [] }    // Step 2: Use the product type to find related products  const { products } = await storefront.query(RELATED_PRODUCTS_QUERY, {    variables: {       productType: product.productType,      excludeId: product.id,      first: 4    }  })    return { relatedProducts: products.nodes }}

// In your component schemainspector: [  {    group: 'Settings',    inputs: [      {        type: 'select',        name: 'sortOrder',        label: 'Sort Products By',        defaultValue: 'best-selling',        shouldRevalidate: true, // This triggers data reload when changed        configs: {          options: [            { value: 'best-selling', label: 'Best Selling' },            { value: 'newest', label: 'Newest' },            { value: 'price-low-high', label: 'Price: Low to High' },            { value: 'price-high-low', label: 'Price: High to Low' }          ]        }      }    ]  }]

// app/sections/dynamic-product-grid/schema.tsexport const schema = {  // ... other schema properties  inspector: [    {      group: 'Content',      inputs: [        {          type: 'collection',          name: 'collection',          label: 'Collection',          // No need for shouldRevalidate as collection inputs auto-revalidate        },        {          type: 'select',          name: 'sortBy',          label: 'Sort By',          defaultValue: 'BEST_SELLING',          shouldRevalidate: true, // Will reload data when changed          configs: {            options: [              { value: 'BEST_SELLING', label: 'Best Selling' },              { value: 'CREATED_AT', label: 'Newest' },              { value: 'PRICE', label: 'Price: Low to High' },              { value: 'PRICE_DESC', label: 'Price: High to Low' }            ]          }        },        {          type: 'range',          name: 'productsToShow',          label: 'Number of Products',          defaultValue: 4,          shouldRevalidate: true, // Will reload data when changed          configs: {            min: 2,            max: 12,            step: 1          }        },        {          type: 'select',          name: 'viewStyle',          label: 'View Style',          defaultValue: 'grid',          shouldRevalidate: false, // UI change only, no data reload needed          configs: {            options: [              { value: 'grid', label: 'Grid' },              { value: 'slider', label: 'Slider' }            ]          }        }      ]    }  ]}
// app/sections/dynamic-product-grid/index.tsimport type { ComponentLoaderArgs } from '@weaverse/hydrogen'
type ProductGridData = {  collection: { handle: string }  sortBy: 'BEST_SELLING' | 'CREATED_AT' | 'PRICE' | 'PRICE_DESC'  productsToShow: number  viewStyle: string}
export let loader = async ({ weaverse, data }: ComponentLoaderArgs<ProductGridData>) => {  const { storefront } = weaverse  const { collection, sortBy, productsToShow } = data    if (!collection?.handle) return { products: [] }    // This query will re-run whenever collection, sortBy, or productsToShow changes  // because they have shouldRevalidate: true in the schema  return await storefront.query(COLLECTION_PRODUCTS_QUERY, {    variables: {      handle: collection.handle,      sortKey: sortBy,      first: productsToShow,      language: storefront.i18n.language,      country: storefront.i18n.country    }  })}
// Component implementation...

export let loader = async ({ weaverse }: ComponentLoaderArgs<StockTickerData>) => {  const { fetchWithCache, storefront } = weaverse    // Fast-changing financial data needs custom caching  return await fetchWithCache('https://api.stocks.example/ticker', {    strategy: storefront.CacheCustom({      // Cache for 30 seconds      maxAge: 30,      // Allow stale content for up to 2 minutes while revalidating      staleWhileRevalidate: 120,      // If revalidation fails, serve stale content for up to 5 minutes      staleIfError: 300,      // Cache control mode      mode: 'public'    })  })}

// app/sections/product-recommendations/index.tsximport type { ComponentLoaderArgs } from '@weaverse/hydrogen'import { RECOMMENDATIONS_QUERY } from '~/graphql/queries'
type RecommendationsData = {  product: { id: string; handle: string }  recommendationType: 'related' | 'complementary' | 'bestsellers'  maxProducts: number}
export let loader = async ({   weaverse,   data }: ComponentLoaderArgs<RecommendationsData>) => {  const { storefront } = weaverse  const { product, recommendationType, maxProducts = 4 } = data    if (!product?.id) return { recommendations: [] }    switch (recommendationType) {    case 'related':    case 'complementary':      return await storefront.query(RECOMMENDATIONS_QUERY, {        variables: {          productId: product.id,          intent: recommendationType.toUpperCase(),          count: maxProducts        }      })        case 'bestsellers':      return await storefront.query(BESTSELLERS_QUERY, {        variables: {          count: maxProducts        }      })  }}

// app/sections/blog-feed/index.tsximport type { ComponentLoaderArgs } from '@weaverse/hydrogen'import { BLOG_ARTICLES_QUERY } from '~/graphql/queries'
type BlogFeedData = {  blog: { handle: string }  category?: string  tagsToInclude: string[]  tagsToExclude: string[]  postsCount: number  sortBy: 'newest' | 'oldest' | 'title'}
export let loader = async ({   weaverse,   data }: ComponentLoaderArgs<BlogFeedData>) => {  const { storefront } = weaverse  const {     blog,     category,     tagsToInclude = [],     tagsToExclude = [],    postsCount = 3,    sortBy = 'newest'  } = data    if (!blog?.handle) return { articles: [] }    // Get all articles for the blog  const response = await storefront.query(BLOG_ARTICLES_QUERY, {    variables: {      blogHandle: blog.handle,      first: 250 // Maximum to retrieve    }  })    // Client-side filtering and sorting (could be moved to a server query with a custom app extension)  let articles = response.blog.articles.nodes    // Filter by category if specified  if (category) {    articles = articles.filter(article =>       article.tags.includes(category)    )  }    // Filter by tags  if (tagsToInclude.length > 0) {    articles = articles.filter(article =>       tagsToInclude.some(tag => article.tags.includes(tag))    )  }    if (tagsToExclude.length > 0) {    articles = articles.filter(article =>       !tagsToExclude.some(tag => article.tags.includes(tag))    )  }    // Sort articles  switch (sortBy) {    case 'newest':      articles.sort((a, b) => new Date(b.publishedAt).getTime() - new Date(a.publishedAt).getTime())      break    case 'oldest':      articles.sort((a, b) => new Date(a.publishedAt).getTime() - new Date(b.publishedAt).getTime())      break    case 'title':      articles.sort((a, b) => a.title.localeCompare(b.title))      break  }    // Limit to requested count  articles = articles.slice(0, postsCount)    return { articles }}

// app/sections/currency-converter/index.tsximport type { ComponentLoaderArgs } from '@weaverse/hydrogen'
type CurrencyConverterData = {  baseCurrency: string  targetCurrencies: string[]  showChart: boolean}
type ExchangeRateResponse = {  base: string  rates: Record<string, number>  timestamp: number}
export let loader = async ({   weaverse,   data }: ComponentLoaderArgs<CurrencyConverterData>) => {  const { fetchWithCache, env, storefront } = weaverse  const {     baseCurrency = 'USD',     targetCurrencies = ['EUR', 'GBP', 'JPY', 'CAD'],    showChart = false   } = data    try {    // Fetch current exchange rates    const exchangeRates = await fetchWithCache<ExchangeRateResponse>(      `https://api.exchangerate.host/latest?base=${baseCurrency}&symbols=${targetCurrencies.join(',')}`,      {        // Exchange rates change throughout the day, but we don't need to fetch every request        strategy: storefront.CacheCustom({          maxAge: 900, // 15 minutes          staleWhileRevalidate: 3600 // 1 hour        })      }    )        // Fetch historical data for chart if needed    let historicalData = null    if (showChart) {      const today = new Date()      const lastMonth = new Date(today.setMonth(today.getMonth() - 1))      const formattedDate = lastMonth.toISOString().split('T')[0]            historicalData = await fetchWithCache(        `https://api.exchangerate.host/timeseries?start_date=${formattedDate}&end_date=${new Date().toISOString().split('T')[0]}&base=${baseCurrency}&symbols=${targetCurrencies.join(',')}`,        {          // Historical data can be cached longer          strategy: storefront.CacheLong()        }      )    }        return {      base: baseCurrency,      rates: exchangeRates.rates,      timestamp: exchangeRates.timestamp,      historicalData: historicalData?.rates || null    }  } catch (error) {    console.error('Currency API error:', error)    return {      base: baseCurrency,      rates: {},      error: 'Failed to fetch exchange rates'    }  }}

// Problem: Data is sometimes undefinedexport let loader = async ({ data }: ComponentLoaderArgs<ProductData>) => {  // ❌ This might cause an error if data.product is undefined  return await storefront.query(QUERY, {     variables: { handle: data.product.handle }  })}
// Solution: Add proper validationexport let loader = async ({ data }: ComponentLoaderArgs<ProductData>) => {  // ✅ Check for existence before accessing properties  if (!data?.product?.handle) return null    return await storefront.query(QUERY, {     variables: { handle: data.product.handle }  })}

// Define explicit types for your component datatype ProductCarouselData = {  products: Array<{ handle: string }>  autoplay: boolean  autoplaySpeed: number}
// Use the type in your loaderexport let loader = async ({   data }: ComponentLoaderArgs<ProductCarouselData>) => {  // TypeScript will now validate that data matches the expected structure}

export let loader = async ({ weaverse }: ComponentLoaderArgs<ApiData>) => {  const { fetchWithCache, storefront } = weaverse    try {    return await fetchWithCache('https://rate-limited-api.example/data', {      // Use longer cache times for rate-limited APIs      strategy: storefront.CacheCustom({        maxAge: 600, // 10 minutes        staleWhileRevalidate: 3600, // 1 hour        staleIfError: 86400 // 1 day - use stale data on errors for a while      })    })  } catch (error) {    // Check for rate limit errors    if (error instanceof Error && error.message.includes('rate limit')) {      console.warn('API rate limit reached, using fallback data')      return getFallbackData()    }    throw error  }}