- If it is possible, HTMLImageElement.loading is used a lightweight native browser lazy loading solution - Custom lazyLoad library is created depending on IntersectionObserver. If IntersectionObserver is not available, the images are eagerly loaded - removed react-lazyload from the dependencies
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@ -13,7 +13,6 @@
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"react": "^17.0.1",
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"react-dom": "^17.0.1",
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"react-helmet": "^6.1.0",
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"react-lazyload": "^3.1.0",
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"react-router-dom": "^5.2.0",
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"react-spring": "^8.0.27",
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"semantic-ui-css": "^2.4.1",
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@ -1,4 +1,4 @@
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import React, { useCallback } from 'react'
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import React, { useCallback, useEffect } from 'react'
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import ReactRouterPropTypes from 'react-router-prop-types'
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import { useQuery, gql } from '@apollo/client'
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import AlbumGallery from '../../components/albumGallery/AlbumGallery'
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@ -7,6 +7,7 @@ import Layout from '../../Layout'
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import useURLParameters from '../../hooks/useURLParameters'
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import useScrollPagination from '../../hooks/useScrollPagination'
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import PaginateLoader from '../../components/PaginateLoader'
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import lazyLoad from '../../helpers/LazyLoad'
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const albumQuery = gql`
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query albumQuery(
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@ -124,6 +125,16 @@ function AlbumPage({ match }) {
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[setOnlyFavorites, refetch]
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)
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useEffect(() => {
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lazyLoad(document.querySelectorAll('img[data-src]'))
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})
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useEffect(() => {
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if (!loading) {
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lazyLoad(document.querySelectorAll('img[data-src]'))
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}
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}, [finishedLoadingMore, onlyFavorites, loading])
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if (error) return <div>Error</div>
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return (
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@ -1,7 +1,8 @@
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import React from 'react'
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import React, { useEffect } from 'react'
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import AlbumBoxes from '../../components/albumGallery/AlbumBoxes'
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import Layout from '../../Layout'
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import { useQuery, gql } from '@apollo/client'
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import lazyLoad from '../../helpers/LazyLoad'
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const getAlbumsQuery = gql`
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query getMyAlbums {
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@ -20,6 +21,12 @@ const getAlbumsQuery = gql`
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const AlbumsPage = () => {
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const { loading, error, data } = useQuery(getAlbumsQuery)
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useEffect(() => {
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if (!loading) {
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lazyLoad(document.querySelectorAll('img[data-src]'))
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}
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}, [loading])
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return (
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<Layout title="Albums">
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<h1>Albums</h1>
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@ -2,7 +2,6 @@ import React, { useState } from 'react'
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import { useMutation, gql } from '@apollo/client'
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import PropTypes from 'prop-types'
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import styled from 'styled-components'
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import LazyLoad from 'react-lazyload'
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import { Icon } from 'semantic-ui-react'
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import { ProtectedImage } from './ProtectedMedia'
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@ -35,31 +34,21 @@ const StyledPhoto = styled(ProtectedImage)`
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transition: opacity 300ms;
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`
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const PhotoImg = photoProps => {
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const LazyPhoto = photoProps => {
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const [loaded, setLoaded] = useState(false)
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return (
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<StyledPhoto
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{...photoProps}
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loading="lazy"
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loaded={loaded ? 1 : 0}
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onLoad={() => {
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setLoaded(true)
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onLoad={e => {
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!e.target.dataset.src && setLoaded(true)
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}}
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/>
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)
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}
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const LazyPhoto = React.memo(
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props => {
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return (
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<LazyLoad scrollContainer="#layout-content">
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<PhotoImg {...props} />
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</LazyLoad>
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)
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},
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(prevProps, nextProps) => prevProps.src === nextProps.src
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)
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LazyPhoto.propTypes = {
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src: PropTypes.string,
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}
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@ -1,4 +1,4 @@
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import React, { useContext, useEffect } from 'react'
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import React, { useContext } from 'react'
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import styled from 'styled-components'
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import { Loader } from 'semantic-ui-react'
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import { MediaThumbnail, PhotoThumbnail } from './MediaThumbnail'
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@ -6,7 +6,6 @@ import PresentView from './presentView/PresentView'
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import PropTypes from 'prop-types'
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import { SidebarContext } from '../sidebar/Sidebar'
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import MediaSidebar from '../sidebar/MediaSidebar'
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import { forceCheck } from 'react-lazyload'
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const Gallery = styled.div`
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display: flex;
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@ -78,10 +77,6 @@ const PhotoGallery = ({
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return photoElements
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}
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useEffect(() => {
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!loading && forceCheck()
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}, [loading])
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return (
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<ClearWrap>
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<Gallery>
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@ -1,6 +1,9 @@
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import React from 'react'
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import PropTypes from 'prop-types'
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const isNativeLazyLoadSupported = false //'loading' in HTMLImageElement.prototype
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const placeholder = 'data:image/gif;base64,R0lGODlhAQABAPAAAAAAAAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=='
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const getProtectedUrl = url => {
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if (url == null) return null
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@ -18,17 +21,24 @@ const getProtectedUrl = url => {
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/**
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* An image that needs authorization to load
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*/
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export const ProtectedImage = ({ src, ...props }) => (
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export const ProtectedImage = ({ src, loading, ...props }) => {
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if (!isNativeLazyLoadSupported && loading === 'lazy') {
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props['data-src'] = getProtectedUrl(src)
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}
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return (
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<img
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key={src}
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{...props}
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src={getProtectedUrl(src)}
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src={loading === 'lazy' ? placeholder : getProtectedUrl(src)}
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crossOrigin="use-credentials"
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/>
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)
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)
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}
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ProtectedImage.propTypes = {
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src: PropTypes.string,
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loading: PropTypes.string,
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}
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export const ProtectedVideo = ({ media, ...props }) => (
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@ -29,6 +29,7 @@ const PresentMedia = ({ media, imageLoaded, ...otherProps }) => {
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<StyledPhoto
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style={{ display: 'none' }}
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src={media.highRes?.url}
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loading="eager"
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onLoad={e => {
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e.target.style.display = 'initial'
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imageLoaded && imageLoaded()
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@ -9,6 +9,7 @@ import useURLParameters from '../../hooks/useURLParameters'
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import { FavoritesCheckbox } from '../AlbumFilter'
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import useScrollPagination from '../../hooks/useScrollPagination'
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import PaginateLoader from '../PaginateLoader'
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import lazyLoad from '../../helpers/LazyLoad'
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const MY_TIMELINE_QUERY = gql`
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query myTimeline($onlyFavorites: Boolean, $limit: Int, $offset: Int) {
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@ -156,6 +157,12 @@ const TimelineGallery = () => {
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}
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}, [onlyFavorites])
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useEffect(() => {
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if (!loading) {
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lazyLoad(document.querySelectorAll('img[data-src]'))
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}
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}, [finishedLoadingMore, onlyFavorites, loading])
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if (error) {
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return error
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}
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@ -0,0 +1,32 @@
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const lazyLoad = elements => {
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function setSrcAttribute(element) {
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if (element.hasAttribute('data-src')) {
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const src = element.getAttribute('data-src')
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element.removeAttribute('data-src')
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element.setAttribute('src', src)
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}
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}
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function loadImage(observer, element) {
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setSrcAttribute(element)
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observer.unobserve(element)
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}
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const images = Array.from(elements)
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if (images.length) {
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if (!('IntersectionObserver' in window)) {
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images.forEach(image => setSrcAttribute(image))
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} else {
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const observer = new IntersectionObserver(entries => {
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entries.forEach(entry => {
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if (entry.isIntersecting || entry.intersectionRatio > 0) {
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loadImage(observer, entry.target)
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}
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})
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})
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images.forEach(image => observer.observe(image))
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}
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}
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}
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export default lazyLoad
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