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FAST_CONNECTION_THRESHOLD\n            : SLOW_CONNECTION_THRESHOLD,\n      }\n    )\n  }\n\n  return function observe(element: HTMLElement): Unobserver {\n    // Store a reference to the callback mapped to the element being watched\n    ioEntryMap.set(element, callback)\n    intersectionObserver.observe(element)\n\n    return function unobserve(): void {\n      if (intersectionObserver && element) {\n        ioEntryMap.delete(element)\n        intersectionObserver.unobserve(element)\n      }\n    }\n  }\n}\n","import React from \"react\"\nimport { renderToStaticMarkup } from \"react-dom/server\"\nimport { LayoutWrapper } from \"./layout-wrapper\"\nimport { Placeholder } from \"./placeholder\"\nimport { MainImage } from \"./main-image\"\nimport {\n  hasNativeLazyLoadSupport,\n  getMainProps,\n  getPlaceholderProps,\n} from \"./hooks\"\nimport { createIntersectionObserver } from \"./intersection-observer\"\nimport type { MainImageProps } from \"./main-image\"\nimport type { GatsbyImageProps } from \"./gatsby-image.browser\"\n\ntype LazyHydrateProps = Omit<GatsbyImageProps, \"as\" | \"style\" | \"className\"> & {\n  isLoading: boolean\n  isLoaded: boolean\n}\n\nasync function applyPolyfill(element: HTMLImageElement): Promise<void> {\n  if (!(`objectFitPolyfill` in window)) {\n    await import(\n      // @ts-ignore typescript can't find the module for some reason ¯\\_(ツ)_/¯\n      /* webpackChunkName: \"gatsby-plugin-image-objectfit-polyfill\" */ `objectFitPolyfill`\n    )\n  }\n  ;(window as any).objectFitPolyfill(element)\n}\n\nfunction toggleLoaded(\n  mainImage: HTMLElement,\n  placeholderImage: HTMLElement\n): void {\n  mainImage.style.opacity = `1`\n\n  if (placeholderImage) {\n    placeholderImage.style.opacity = `0`\n  }\n}\n\nfunction startLoading(\n  element: HTMLElement,\n  cacheKey: string,\n  imageCache: Set<string>,\n  onStartLoad: GatsbyImageProps[\"onStartLoad\"],\n  onLoad: GatsbyImageProps[\"onLoad\"],\n  onError: GatsbyImageProps[\"onError\"]\n): () => void {\n  const mainImage = element.querySelector(\n    `[data-main-image]`\n  ) as HTMLImageElement\n  const placeholderImage = element.querySelector<HTMLElement>(\n    `[data-placeholder-image]`\n  )\n  const isCached = imageCache.has(cacheKey)\n\n  function onImageLoaded(e): void {\n    // eslint-disable-next-line @babel/no-invalid-this\n    this.removeEventListener(`load`, onImageLoaded)\n\n    const target = e.currentTarget\n    const img = new Image()\n    img.src = target.currentSrc\n\n    if (img.decode) {\n      // Decode the image through javascript to support our transition\n      img\n        .decode()\n        .then(() => {\n          // eslint-disable-next-line @babel/no-invalid-this\n          toggleLoaded(this, placeholderImage)\n          onLoad?.({\n            wasCached: isCached,\n          })\n        })\n        .catch(e => {\n          // eslint-disable-next-line @babel/no-invalid-this\n          toggleLoaded(this, placeholderImage)\n          onError?.(e)\n        })\n    } else {\n      // eslint-disable-next-line @babel/no-invalid-this\n      toggleLoaded(this, placeholderImage)\n      onLoad?.({\n        wasCached: isCached,\n      })\n    }\n  }\n\n  mainImage.addEventListener(`load`, onImageLoaded)\n\n  onStartLoad?.({\n    wasCached: isCached,\n  })\n  Array.from(mainImage.parentElement.children).forEach(child => {\n    const src = child.getAttribute(`data-src`)\n    const srcSet = child.getAttribute(`data-srcset`)\n    if (src) {\n      child.removeAttribute(`data-src`)\n      child.setAttribute(`src`, src)\n    }\n    if (srcSet) {\n      child.removeAttribute(`data-srcset`)\n      child.setAttribute(`srcset`, srcSet)\n    }\n  })\n\n  imageCache.add(cacheKey)\n\n  // Load times not always fires - mostly when it's a 304\n  // We check if the image is already completed and if so we trigger onload.\n  if (mainImage.complete) {\n    onImageLoaded.call(mainImage, {\n      currentTarget: mainImage,\n    })\n  }\n\n  return (): void => {\n    if (mainImage) {\n      mainImage.removeEventListener(`load`, onImageLoaded)\n    }\n  }\n}\n\nexport function swapPlaceholderImage(\n  element: HTMLElement,\n  cacheKey: string,\n  imageCache: Set<string>,\n  style: React.CSSProperties,\n  onStartLoad: GatsbyImageProps[\"onStartLoad\"],\n  onLoad: GatsbyImageProps[\"onLoad\"],\n  onError: GatsbyImageProps[\"onError\"]\n): () => void {\n  if (!hasNativeLazyLoadSupport()) {\n    let cleanup\n    const io = createIntersectionObserver(() => {\n      cleanup = startLoading(\n        element,\n        cacheKey,\n        imageCache,\n        onStartLoad,\n        onLoad,\n        onError\n      )\n    })\n    const unobserve = io(element)\n\n    // Polyfill \"object-fit\" if unsupported (mostly IE)\n    if (!(`objectFit` in document.documentElement.style)) {\n      element.dataset.objectFit = style.objectFit ?? `cover`\n      element.dataset.objectPosition = `${style.objectPosition ?? `50% 50%`}`\n      applyPolyfill(element as HTMLImageElement)\n    }\n\n    return (): void => {\n      if (cleanup) {\n        cleanup()\n      }\n\n      unobserve()\n    }\n  }\n\n  return startLoading(\n    element,\n    cacheKey,\n    imageCache,\n    onStartLoad,\n    onLoad,\n    onError\n  )\n}\n\nexport function renderImageToString({\n  image,\n  loading = `lazy`,\n  isLoading,\n  isLoaded,\n  imgClassName,\n  imgStyle = {},\n  objectPosition,\n  backgroundColor,\n  objectFit = `cover`,\n  ...props\n}: LazyHydrateProps): string {\n  const {\n    width,\n    height,\n    layout,\n    images,\n    placeholder,\n    backgroundColor: wrapperBackgroundColor,\n  } = image\n\n  imgStyle = {\n    objectFit,\n    objectPosition,\n    backgroundColor,\n    ...imgStyle,\n  }\n\n  return renderToStaticMarkup(\n    <LayoutWrapper layout={layout} width={width} height={height}>\n      <Placeholder\n        {...getPlaceholderProps(\n          placeholder,\n          isLoaded,\n          layout,\n          width,\n          height,\n          wrapperBackgroundColor,\n          objectFit,\n          objectPosition\n        )}\n      />\n\n      <MainImage\n        {...(props as Omit<\n          MainImageProps,\n          \"images\" | \"fallback\" | \"onLoad\" | \"onError\"\n        >)}\n        width={width}\n        height={height}\n        className={imgClassName}\n        {...getMainProps(isLoading, isLoaded, images, loading, imgStyle)}\n      />\n    </LayoutWrapper>\n  )\n}\n"],"names":["intersectionObserver","ioEntryMap","WeakMap","connection","navigator","mozConnection","webkitConnection","_excluded","toggleLoaded","mainImage","placeholderImage","style","opacity","startLoading","element","cacheKey","imageCache","onStartLoad","onLoad","onError","querySelector","has","onImageLoaded","e","this","removeEventListener","target","currentTarget","img","Image","src","currentSrc","decode","then","wasCached","isCached","catch","addEventListener","Array","from","parentElement","children","forEach","child","getAttribute","srcSet","removeAttribute","setAttribute","add","complete","call","hasNativeLazyLoadSupport","cleanup","callback","IntersectionObserver","entries","entry","isIntersecting","get","delete","rootMargin","effectiveType","saveData","set","observe","unobserve","io","document","documentElement","dataset","objectFit","_style$objectFit","objectPosition","async","window","import","objectFitPolyfill","renderImageToString","image","loading","isLoading","isLoaded","imgClassName","imgStyle","backgroundColor","_ref","props","_objectWithoutPropertiesLoose","width","height","layout","images","placeholder","wrapperBackgroundColor","React","createElement","getPlaceholderProps","MainImage","className","getMainProps"],"sourceRoot":""}