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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

8

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js86400.0 s114.5 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Ge...0.0 ms45.1 KiB
t-cf.bstatic.com/design-assets/assets/v3.155.1/fonts-brand/BookingBold.woff0.0 ms41.6 KiB
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...604800.0 s191.4 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Tr...0.0 ms18.8 KiB
/js/ld/ld.js?an=web-booking.com&cn=sg&ln=en&fpid=0069e119...10800.0 s25.0 KiB
/js/ld/ld.js?an=web-booking.agoda.com&cn=sg&ln=en&fpid=00...10800.0 s25.0 KiB
/js/ld/ld.js?an=web-booking.com.offsite&cn=sg&ln=en&fpid=...10800.0 s24.7 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
xx.bstatic.com/psb/cross-sell/mobile/en-us_cross-sell.dff55db.js604800.0 s131.2 KiB
js.adsrvr.org/up_loader.1.1.0.js0.0 ms12.3 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Fr...0.0 ms10.9 KiB
s.yimg.jp/images/listing/tool/cv/ytag.js600.0 s11.8 KiB
/mobile/css/core_cloudfront_sd.iq_ltr/f870110eb8a677f2393...604800.0 s60.2 KiB
/mobile/js/lp_cloudfront_sd/86a3922ffbc29832892b2b55a9326...604800.0 s40.5 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Cu...0.0 ms4.0 KiB
xx.bstatic.com/psb/cross-sell/mobile/cross-sell.39b6290.css604800.0 s38.5 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js86400.0 s8.8 KiB
/mobile/js/core-deps-inlinedet_cloudfront_sd/97754f5bf295...604800.0 s32.2 KiB
/mobile/js/app_cloudfront_sd/af798b02106f5d8e4bbd030df77b...604800.0 s23.2 KiB
t-cf.bstatic.com/design-assets/assets/v3.176.0/images-flags/Us@3x.png0.0 ms1.5 KiB
cdn.cookielaw.org/consent/3ea94870-d4b1-483a-b1d2-faf1d982bb31/OtAutoBlock.js86400.0 s3.5 KiB
www.google-analytics.com/plugins/ua/ec.js3600.0 s1.4 KiB
js.adsrvr.org/universal_pixel.js0.0 ms957 B
cf.bstatic.com/mobile/js/index_cloudfront_sd.js604800.0 s8.4 KiB
/mobile/css/index_cloudfront_sd.iq_ltr/e9ec939a3d8a053780...604800.0 s7.2 KiB
/mobile/css/app_cloudfront_sd.iq_ltr/3b767179bdab20449f77...604800.0 s6.0 KiB
/mobile/images/gta/iphone_app_icon/6a9bd9ce320f24431aa007...604800.0 s4.4 KiB
/mobile/js/index_sync_cloudfront_sd/88bc7ac1e9176c48830e6...604800.0 s4.1 KiB
/static/js/error_catcher_bec_cloudfront_sd/c40c5563744028...604800.0 s3.0 KiB
/mobile/css/iq_m_type_overrides_cloudfront_sd.iq_ltr/cf62...604800.0 s2.4 KiB
/mobile/images/loader_db/2ba7cff11f840f10028118d4c5069cc7...604800.0 s2.2 KiB
/mobile/js/index_async_cloudfront_sd/1d079722759560d5e441...604800.0 s1.1 KiB
/static/js/crossorigin_check_cloudfront_sd/2454015045ef79...604800.0 s579 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.36289899999999997] map[node:map[boundingRect:map[bottom:3421 height:674 left:0 right:412 top:2747 width:412] lhId:page-0-FOOTER nodeLabel:Get the free app Search, book & manage your trips in the app Install Countries … path:3,HTML,1,BODY,0,DIV,0,DIV,6,FOOTER selector:body#b2indexPage > div#main_container > div#main_content > footer.site-footer snippet:<footer class="site-footer js-site-footer css-loading-hidden hide-footer-menu-tab" data-et-view=" goal:mdot_index_full_page_scroll " style="margin-bottom: 60px;"> type:node] score:0.127675 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:2823 height:60 left:16 right:76 top:2763 width:60] lhId:page-4-IMG nodeLabel:Booking path:3,HTML,1,BODY,0,DIV,0,DIV,6,FOOTER,2,DIV,2,A,0,DIV,0,DIV,0,DIV,0,PICTURE,0,IMG selector:div.f6e3a11b0d > div > picture.b7a691c583 > img.f6c12c77eb snippet:<img class="f6c12c77eb c0e44985a8 c09abd8a52" src="https://cf.bstatic.com/mobile/images/gta/iphone_app_icon/6a9bd9ce320f24431…" alt="Booking" loading="lazy"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:2731 height:1684 left:0 right:412 top:1047 width:412] lhId:page-2-DIV nodeLabel:Rent a car Hundreds of cars and 24/7 customer service Book an airport transfer … path:3,HTML,1,BODY,0,DIV,0,DIV,2,DIV,19,DIV selector:div#main_container > div#main_content > div.tabbed-nav--content > div.css-loading-hidden snippet:<div class="css-loading-hidden m_lp_below_fold_container"> type:node] score:0.117612 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:2823 height:60 left:16 right:76 top:2763 width:60] lhId:page-4-IMG nodeLabel:Booking path:3,HTML,1,BODY,0,DIV,0,DIV,6,FOOTER,2,DIV,2,A,0,DIV,0,DIV,0,DIV,0,PICTURE,0,IMG selector:div.f6e3a11b0d > div > picture.b7a691c583 > img.f6c12c77eb snippet:<img class="f6c12c77eb c0e44985a8 c09abd8a52" src="https://cf.bstatic.com/mobile/images/gta/iphone_app_icon/6a9bd9ce320f24431…" alt="Booking" loading="lazy"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:2731 height:1684 left:0 right:412 top:1047 width:412] lhId:page-2-DIV nodeLabel:Rent a car Hundreds of cars and 24/7 customer service Book an airport transfer … path:3,HTML,1,BODY,0,DIV,0,DIV,2,DIV,19,DIV selector:div#main_container > div#main_content > div.tabbed-nav--content > div.css-loading-hidden snippet:<div class="css-loading-hidden m_lp_below_fold_container"> type:node] score:0.117612]]

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:38.359 source:map[column:952848 line:8 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.1572d987.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:108.484 source:map[type:text value:[unattributed]]] map[reflowTime:17.775 source:map[column:181187 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.1572d987.js urlProvider:network]] map[reflowTime:13.797 source:map[column:180586 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.1572d987.js urlProvider:network]] map[reflowTime:6.787 source:map[column:21384 line:1 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/18cad957.6daa46db.chunk.js urlProvider:network]] map[reflowTime:27.923 source:map[column:144199 line:1 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js urlProvider:network]] map[reflowTime:0.236 source:map[column:48210 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097865 urlProvider:network]] map[reflowTime:1.581 source:map[column:241830 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097865 urlProvider:network]] map[reflowTime:0.751 source:map[column:61568 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097865 urlProvider:network]] map[reflowTime:0.422 source:map[column:252054 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097865 urlProvider:network]] map[reflowTime:0.084 source:map[column:86934 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097865 urlProvider:network]]]

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
cf.bstatic.com/psb/capla/static/css/22e5ddc2.30126616.chunk.css5.2 KiB
cf.bstatic.com/psb/capla/static/css/18cad957.dbb1072a.chunk.css743 B
cf.bstatic.com/psb/capla/static/css/dc32f6b7.2e0b6b1e.chunk.css4.0 KiB
cf.bstatic.com/psb/capla/static/css/c10242aa.faa5c279.chunk.css922 B
cf.bstatic.com/psb/capla/static/css/75453889.58087283.chunk.css1.4 KiB
cf.bstatic.com/psb/capla/static/css/client.01f0d2ae.css32.0 KiB153 ms
cdn.cookielaw.org/consent/3ea94870-d4b1-483a-b1d2-faf1d982bb31/OtAutoBlock.js3.5 KiB776 ms
cf.bstatic.com/psb/capla/static/css/81da5f32.89ae8754.chunk.css3.3 KiB
cf.bstatic.com/psb/capla/static/css/b9a82cb8.28b83939.chunk.css3.1 KiB
cf.bstatic.com/psb/capla/static/css/c44295c5.11649901.chunk.css1.7 KiB

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
t-cf.bstatic.com/design-assets/assets/v3.155.1/fonts-brand/BookingBold.woff5.0 ms

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.f6e3a11b0d > div.f6e3a11b0d > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.f6e3a11b0d > picture.b7a691c583 > img.f6c12c77eb
/design-assets/assets/v3.176.0/illustrations-traveller/Ge...44.5 KiB39.8 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/506180534.jpg?k=3a4a957be22...42.9 KiB22.1 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/722933693.jpg?k=8b7eea1a164...41.3 KiB20.5 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/32562231.jpg?k=f5a628ea5726...40.4 KiB19.6 KiB
2+ million properties worldwide section.c3bdfd4ac2 > div.f6e3a11b0d > picture.b7a691c583 > img.f6c12c77eb
/design-assets/assets/v3.176.0/illustrations-traveller/Tr...18.2 KiB16.6 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/806787928.jpg?k=e3f9b932633...35.4 KiB14.6 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/507775515.jpg?k=e4993e03bd7...35.2 KiB14.4 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/17259715.jpg?k=f3bcb8cf75ea...33.7 KiB12.9 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/573412516.jpg?k=859cceaf976...32.9 KiB12.0 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/311509714.jpg?k=bcde67e6d9b...19.4 KiB11.9 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/795249782.jpg?k=0588a134337...17.3 KiB9.9 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/311907941.jpg?k=23b724615fa...30.2 KiB9.4 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/819603743.jpg?k=28de6054277...15.6 KiB8.1 KiB
Book now, pay at the property section.c3bdfd4ac2 > div.f6e3a11b0d > picture.b7a691c583 > img.f6c12c77eb
/design-assets/assets/v3.176.0/illustrations-traveller/Fr...10.3 KiB6.8 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/356425197.jpg?k=4b5f46c616b...13.7 KiB6.2 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/826078278.jpg?k=b143e611815...13.6 KiB6.1 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/593820916.jpg?k=600df05b063...13.1 KiB5.7 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/847960073.jpg?k=90b44442ab2...13.0 KiB5.5 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/70544252.jpg?k=b1ed02920cf5...25.9 KiB5.1 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 9.0 s
URLTime Spent
booking.com/1.7 s
www.booking.com/7.3 s
www.booking.com/?chal_t=1776359855151&force_referer=0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Get the free app Search, book & manage your trips in the app Install Countries … body#b2indexPage > div#main_container > div#main_content > footer.site-footer
0.128
Rent a car Hundreds of cars and 24/7 customer service Book an airport transfer … div#main_container > div#main_content > div.tabbed-nav--content > div.css-loading-hidden
0.118
Rent a car Hundreds of cars and 24/7 customer service Book an airport transfer … div#main_container > div#main_content > div.tabbed-nav--content > div.css-loading-hidden
0.118

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 450 ms 122.7 KiB
URLTransfer SizeEst Savings
/mobile/css/core_cloudfront_sd.iq_ltr/f870110eb8a677f2393...59.8 KiB57.5 KiB
xx.bstatic.com/psb/cross-sell/mobile/cross-sell.39b6290.css38.0 KiB37.5 KiB
cf.bstatic.com/psb/capla/static/css/client.01f0d2ae.css31.5 KiB27.7 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.5 s 2.2 MiB
URLTransfer SizeEst Savings
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js505.1 KiB297.3 KiB
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...493.8 KiB243.6 KiB
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js223.6 KiB218.9 KiB
cf.bstatic.com/psb/capla/static/js/client.1572d987.js408.3 KiB179.4 KiB
cf.bstatic.com/psb/capla/static/js/02d40367.f223b497.chunk.js222.8 KiB156.0 KiB
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...190.9 KiB148.3 KiB
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js122.1 KiB110.8 KiB
/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31...187.7 KiB108.6 KiB
cf.bstatic.com/psb/capla/static/js/dceb1327.9d726c05.chunk.js121.3 KiB77.9 KiB
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js114.3 KiB73.9 KiB
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js158.9 KiB72.7 KiB
accounts.google.com/gsi/client95.3 KiB68.2 KiB
www.googletagmanager.com/gtag/destination?id=DC-4228414&cx=c&gtm=4e64f0129.8 KiB61.9 KiB
xx.bstatic.com/psb/cross-sell/mobile/en-us_cross-sell.dff55db.js130.7 KiB61.3 KiB
www.googletagmanager.com/gtag/js?id=G-A12345&cx=c&gtm=4e64f0136.6 KiB60.1 KiB
www.googletagmanager.com/gtag/destination?id=AW-988382855&cx=c&gtm=4e64f0145.9 KiB55.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-5Q664QZ180.5 KiB48.9 KiB
cf.bstatic.com/psb/capla/static/js/22e5ddc2.35d6be05.chunk.js138.9 KiB41.2 KiB
cf.bstatic.com/psb/capla/static/js/ac3443c9.52570aea.chunk.js73.0 KiB35.6 KiB
cf.bstatic.com/psb/capla/static/js/b9a82cb8.3e27c878.chunk.js37.2 KiB32.6 KiB
/mobile/js/lp_cloudfront_sd/86a3922ffbc29832892b2b55a9326...40.0 KiB27.5 KiB
cf.bstatic.com/psb/capla/static/js/8067d7e4.cc24c312.chunk.js26.8 KiB26.3 KiB
/js/ld/ld.js?an=web-booking.com&cn=sg&ln=en&fpid=0069e119...24.7 KiB21.8 KiB
/js/ld/ld.js?an=web-booking.agoda.com&cn=sg&ln=en&fpid=00...24.7 KiB21.8 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
cf.bstatic.com/psb/capla/static/js/client.1572d987.js5.6 s4.6 s206 ms
Unattributable3.9 s1.8 s0.0 ms
www.booking.com/?chal_t=1776359855151&force_referer=2.9 s333 ms79 ms
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js1.4 s1.1 s232 ms
www.googletagmanager.com/gtm.js?id=GTM-5Q664QZ1.3 s1.1 s104 ms
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...1.0 s733 ms182 ms
cf.bstatic.com/psb/capla/static/js/c10242aa.09f4d05a.chunk.js783 ms777 ms2.0 ms
/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31...650 ms521 ms79 ms
www.googletagmanager.com/gtag/js?id=G-A12345&cx=c&gtm=4e64f0525 ms427 ms57 ms
cf.bstatic.com/psb/capla/static/js/remoteEntry.eeebe667.client.js475 ms472 ms2.8 ms
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...390 ms290 ms85 ms
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js389 ms49 ms73 ms
www.googletagmanager.com/gtag/destination?id=AW-988382855&cx=c&gtm=4e64f0383 ms321 ms57 ms
www.googletagmanager.com/gtag/destination?id=DC-4228414&cx=c&gtm=4e64f0366 ms280 ms84 ms
cf.bstatic.com/psb/capla/static/js/dceb1327.9d726c05.chunk.js323 ms245 ms77 ms
xx.bstatic.com/psb/cross-sell/mobile/en-us_cross-sell.dff55db.js239 ms173 ms64 ms
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js187 ms110 ms75 ms
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js154 ms6.3 ms147 ms
cf.bstatic.com/psb/capla/static/js/02d40367.f223b497.chunk.js152 ms3.1 ms148 ms
cdn.cookielaw.org/consent/3ea94870-d4b1-483a-b1d2-faf1d982bb31/OtAutoBlock.js144 ms120 ms1.8 ms
accounts.google.com/gsi/client133 ms91 ms37 ms
/js/ld/ld.js?an=web-booking.com.offsite&cn=sg&ln=en&fpid=...126 ms114 ms9.9 ms
securepubads.g.doubleclick.net/tag/js/gpt.js109 ms94 ms14 ms
/mobile/js/core-deps-inlinedet_cloudfront_sd/97754f5bf295...105 ms86 ms12 ms
cf.bstatic.com/psb/capla/static/js/22e5ddc2.35d6be05.chunk.js91 ms2.1 ms89 ms
cf.bstatic.com/psb/capla/static/js/7c8fc42b.da6b8b76.chunk.js90 ms86 ms2.4 ms
www.google-analytics.com/analytics.js69 ms52 ms11 ms
cf.bstatic.com/psb/capla/static/js/4d31cdd7.eda0a887.chunk.js66 ms62 ms1.5 ms
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js60 ms6.4 ms53 ms
/_/service_worker/63b0/sw_iframe.html?origin=https%3A%2F%...56 ms8.8 ms1.8 ms
www.booking.com/54 ms45 ms2.5 ms
ep2.adtrafficquality.google/sodar/sodar2.js53 ms45 ms3.1 ms
/mobile/js/lp_cloudfront_sd/86a3922ffbc29832892b2b55a9326...53 ms15 ms37 ms
/mobile/js/index_sync_cloudfront_sd/88bc7ac1e9176c48830e6...51 ms38 ms1.6 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation14.6 s
Other3.2 s
Script Parsing & Compilation2.4 s
Style & Layout1.8 s
Rendering633 ms
Garbage Collection476 ms
Parse HTML & CSS285 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js505.5 KiB
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...494.5 KiB
cf.bstatic.com/psb/capla/static/js/client.1572d987.js408.8 KiB
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js224.1 KiB
cf.bstatic.com/psb/capla/static/js/02d40367.f223b497.chunk.js223.3 KiB
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...191.4 KiB
/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31...187.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-5Q664QZ180.9 KiB
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js159.4 KiB
www.booking.com/?chal_t=1776359855151&force_referer=149.1 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div.f6e3a11b0d > div.f6e3a11b0d > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.f6e3a11b0d > picture.b7a691c583 > img.f6c12c77eb
/design-assets/assets/v3.176.0/illustrations-traveller/Ge...
Booking div.f6e3a11b0d > div > picture.b7a691c583 > img.f6c12c77eb
/mobile/images/gta/iphone_app_icon/6a9bd9ce320f24431aa007...
Booking div.f6e3a11b0d > div > picture.b7a691c583 > img.f6c12c77eb
/mobile/images/gta/iphone_app_icon/6a9bd9ce320f24431aa007...

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Document request latency
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 26 user timings
●Avoid long main-thread tasks 20 long tasks found
●Network Requests
●Network Round Trip Times 240 ms
●Server Backend Latencies 940 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 480 ms
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
94

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Book now, pay at the property div.aa225776f2 > div.f6e3a11b0d > div.b779265b5e > h3#:r1g:

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5
This property is part of our Preferred Partner Program. It's committed to provi… div.f6e3a11b0d > div.f6e3a11b0d > span.a297f43545 > span.de5b77f4e5

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html.has-js html.has-js

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Rent a car Hundreds of cars and 24/7 customer service div.csxp-component > div.csxp-component-layout-contained-list > div.csxp-element-wrapper > button.Actionable-module_root__gOqu6
Book an airport transfer A driver will be waiting to take you to your stay div.csxp-component > div.csxp-component-layout-contained-list > div.csxp-element-wrapper > button.Actionable-module_root__gOqu6
Book a flight Compare thousands of flights, all with no hidden fees div.csxp-component > div.csxp-component-layout-contained-list > div.csxp-element-wrapper > button.Actionable-module_root__gOqu6
Find things to do Instant confirmation, digital tickets, and verified customer … div.csxp-component > div.csxp-component-layout-contained-list > div.csxp-element-wrapper > button.Actionable-module_root__gOqu6
SGD Select your currency div.b7ef425131 > div.f6e3a11b0d > div.f6e3a11b0d > button.de576f5064
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
●`[role]`s are contained by their required parent element
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●Select elements have associated label elements.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
○`[accesskey]` values are unique
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817... line 42, col 26393
AttributionReporting
www.googletagmanager.com/gtag/destination?id=AW-988382855&cx=c&gtm=4e64f0 line 591, col 244

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.booking.com/favicon.ico
Failed to load resource: the server responded with a status of 404 ()
www.booking.com/?chal_t=1776359855151&force_referer=
Not signed in with the identity provider.

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...
cf.bstatic.com/psb/capla/static/js/remoteEntry.eeebe667.client.js/internal-static/capla/static/js/remoteEntry.eeebe667.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.e421bb9c.client.js/internal-static/capla/static/js/remoteEntry.e421bb9c.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.e31304c1.client.js/internal-static/capla/static/js/remoteEntry.e31304c1.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.e0e9c575.client.js/internal-static/capla/static/js/remoteEntry.e0e9c575.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.df4da086.client.js/internal-static/capla/static/js/remoteEntry.df4da086.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.ccaf8fc2.client.js/internal-static/capla/static/js/remoteEntry.ccaf8fc2.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.c51d0747.client.js/internal-static/capla/static/js/remoteEntry.c51d0747.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.a3b60682.client.js/internal-static/capla/static/js/remoteEntry.a3b60682.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.7e9c5ca6.client.js/internal-static/capla/static/js/remoteEntry.7e9c5ca6.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.78b14e1c.client.js/internal-static/capla/static/js/remoteEntry.78b14e1c.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.7082ab09.client.js/internal-static/capla/static/js/remoteEntry.7082ab09.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.659aef97.client.js/internal-static/capla/static/js/remoteEntry.659aef97.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.557a7391.client.js/internal-static/capla/static/js/remoteEntry.557a7391.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.4031bf54.client.js/internal-static/capla/static/js/remoteEntry.4031bf54.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.3f466b65.client.js/internal-static/capla/static/js/remoteEntry.3f466b65.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.1d233fe8.client.js/internal-static/capla/static/js/remoteEntry.1d233fe8.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.07146c47.client.js/internal-static/capla/static/js/remoteEntry.07146c47.cli...
/psb/capla/static/js/node_modules_bookingcom_bui-react_co.../internal-static/capla/static/js/node_modules_bookingcom_...
cf.bstatic.com/psb/capla/static/js/e3c2db23.9ee9611c.chunk.js/internal-static/capla/static/js/e3c2db23.9ee9611c.chunk....
cf.bstatic.com/psb/capla/static/js/dceb1327.9d726c05.chunk.js/internal-static/capla/static/js/dceb1327.9d726c05.chunk....
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js/internal-static/capla/static/js/dc32f6b7.6d16fe38.chunk....
cf.bstatic.com/psb/capla/static/js/da7ccad2.5cfbb0ea.chunk.js/internal-static/capla/static/js/da7ccad2.5cfbb0ea.chunk....
cf.bstatic.com/psb/capla/static/js/d453fd14.f746397a.chunk.js/internal-static/capla/static/js/d453fd14.f746397a.chunk....
cf.bstatic.com/psb/capla/static/js/d3416aac.9d174778.chunk.js/internal-static/capla/static/js/d3416aac.9d174778.chunk....
cf.bstatic.com/psb/capla/static/js/d09b480e.281670ce.chunk.js/internal-static/capla/static/js/d09b480e.281670ce.chunk....
cf.bstatic.com/psb/capla/static/js/client.1572d987.jsistatic.booking.com/internal-static/capla/static/js/client.1572d987.js.map
cf.bstatic.com/psb/capla/static/js/ca95e682.4fb3a165.chunk.js/internal-static/capla/static/js/ca95e682.4fb3a165.chunk....
cf.bstatic.com/psb/capla/static/js/c52402fc.e2f81692.chunk.js/internal-static/capla/static/js/c52402fc.e2f81692.chunk....
cf.bstatic.com/psb/capla/static/js/c44295c5.97f617f7.chunk.js/internal-static/capla/static/js/c44295c5.97f617f7.chunk....
cf.bstatic.com/psb/capla/static/js/c3922a16.1dd68bf0.chunk.js/internal-static/capla/static/js/c3922a16.1dd68bf0.chunk....
cf.bstatic.com/psb/capla/static/js/c10242aa.09f4d05a.chunk.js/internal-static/capla/static/js/c10242aa.09f4d05a.chunk....
cf.bstatic.com/psb/capla/static/js/b9a82cb8.3e27c878.chunk.js/internal-static/capla/static/js/b9a82cb8.3e27c878.chunk....
cf.bstatic.com/psb/capla/static/js/b0cc0785.c5747db8.chunk.js/internal-static/capla/static/js/b0cc0785.c5747db8.chunk....
cf.bstatic.com/psb/capla/static/js/ac3443c9.52570aea.chunk.js/internal-static/capla/static/js/ac3443c9.52570aea.chunk....
cf.bstatic.com/psb/capla/static/js/a2dc7d35.883ff4e3.chunk.js/internal-static/capla/static/js/a2dc7d35.883ff4e3.chunk....
cf.bstatic.com/psb/capla/static/js/9a3d71ce.c96b5413.chunk.js/internal-static/capla/static/js/9a3d71ce.c96b5413.chunk....
cf.bstatic.com/psb/capla/static/js/967ac2a3.bb9ff392.chunk.js/internal-static/capla/static/js/967ac2a3.bb9ff392.chunk....
cf.bstatic.com/psb/capla/static/js/8e69b76c.b60adba2.chunk.js/internal-static/capla/static/js/8e69b76c.b60adba2.chunk....
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js/internal-static/capla/static/js/81da5f32.6979dec3.chunk....
cf.bstatic.com/psb/capla/static/js/8067d7e4.cc24c312.chunk.js/internal-static/capla/static/js/8067d7e4.cc24c312.chunk....
cf.bstatic.com/psb/capla/static/js/7e8161ba.d0557374.chunk.js/internal-static/capla/static/js/7e8161ba.d0557374.chunk....
cf.bstatic.com/psb/capla/static/js/7c8fc42b.da6b8b76.chunk.js/internal-static/capla/static/js/7c8fc42b.da6b8b76.chunk....
cf.bstatic.com/psb/capla/static/js/797430b2.d826d081.chunk.js/internal-static/capla/static/js/797430b2.d826d081.chunk....
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●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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