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Audit Complete

Results for https://www.booking.com

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Netherlands Netherlands · Amsterdam Completed: Apr 4, 2026 16:39 UTC
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Mobile 375 × 812

Screenshot of the audited page (Mobile 375×812)

Desktop 1440 × 900

Screenshot of the audited page (Desktop 1440×900)
D67

Site Health

Score: 67 / 100

Based on 8 categories, 0 sections

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

Top Priorities (5)

1

Content-Security-Policy header is missing

Security › Security Headers
2

No Content-Security-Policy header found

Security › Content Security Policy
3

Page weighs 16.9 MB (5.2 MB transferred)

Performance › Page Weight Budget
4

No <main> landmark found

Accessibility › Landmark Structure
5

No favicon or icon links detected

Accessibility › Favicon & Branding
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[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.booking.com)](https://beavercheck.com/results/be6eb97a-65b7-4f68-9ca1-829bfaaea356)
<a href="https://beavercheck.com/results/be6eb97a-65b7-4f68-9ca1-829bfaaea356"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwww.booking.com" alt="BeaverCheck Score"></a>
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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

4
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

7.28 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

24.86 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

9.95 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.583

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

10.28 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

33.53 s

Detailed Report

Audit breakdown by category with detailed findings.

4

Performance

Insights

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

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

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

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

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
/design-assets/assets/v3.176.0/illustrations-traveller/Tr...0.0 ms18.8 KiB
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...604800.0 s176.9 KiB
xx.bstatic.com/psb/cross-sell/mobile/en-us_cross-sell.be2d261.js604800.0 s130.6 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Fr...0.0 ms10.9 KiB
/mobile/css/core_cloudfront_sd.iq_ltr/f870110eb8a677f2393...604800.0 s65.1 KiB
xx.bstatic.com/psb/cross-sell/mobile/cross-sell.6eb3225.css604800.0 s42.0 KiB
/mobile/js/lp_cloudfront_sd/86a3922ffbc29832892b2b55a9326...604800.0 s40.6 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Cu...0.0 ms4.0 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js86400.0 s8.8 KiB
/mobile/js/core-deps-inlinedet_cloudfront_sd/97754f5bf295...604800.0 s32.9 KiB
/mobile/js/app_cloudfront_sd/af798b02106f5d8e4bbd030df77b...604800.0 s23.3 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
cf.bstatic.com/mobile/js/index_cloudfront_sd.js604800.0 s8.1 KiB
/mobile/css/index_cloudfront_sd.iq_ltr/e9ec939a3d8a053780...604800.0 s7.2 KiB
/mobile/css/app_cloudfront_sd.iq_ltr/3b767179bdab20449f77...604800.0 s6.4 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 s2.8 KiB
/mobile/css/iq_m_type_overrides_cloudfront_sd.iq_ltr/cf62...604800.0 s2.6 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 s600 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.

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:0.582518] map[node:map[boundingRect:map[bottom:823 height:318 left:0 right:412 top:505 width:412] lhId:page-1-DIV nodeLabel:Manage cookie settings When you use Booking.com, we (Booking.com and our partn… path:3,HTML,1,BODY,95,DIV,1,DIV selector:body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk snippet:<div id="onetrust-banner-sdk" class="otFlat bottom vertical-align-content ot-buttons-fw" tabindex="0" role="region" aria-label="Cookie banner" style="bottom: 0px;"> type:node] score:0.190569 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:3516 height:60 left:16 right:76 top:3456 width:60] lhId:page-5-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:3424 height:2211 left:0 right:412 top:1213 width:412] lhId:page-4-DIV nodeLabel:Rent a car Hundreds of cars and 24/7 customer service Book a private airport ta… 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:0.177426 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:3516 height:60 left:16 right:76 top:3456 width:60] lhId:page-5-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:3424 height:2211 left:0 right:412 top:1213 width:412] lhId:page-4-DIV nodeLabel:Rent a car Hundreds of cars and 24/7 customer service Book a private airport ta… 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:0.177426] map[node:map[boundingRect:map[bottom:823 height:318 left:0 right:412 top:505 width:412] lhId:page-1-DIV nodeLabel:Manage cookie settings When you use Booking.com, we (Booking.com and our partn… path:3,HTML,1,BODY,95,DIV,1,DIV selector:body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk snippet:<div id="onetrust-banner-sdk" class="otFlat bottom vertical-align-content ot-buttons-fw" tabindex="0" role="region" aria-label="Cookie banner" style="bottom: 0px;"> type:node] score:0.012331] map[node:map[boundingRect:map[bottom:823 height:318 left:0 right:412 top:505 width:412] lhId:page-1-DIV nodeLabel:Manage cookie settings When you use Booking.com, we (Booking.com and our partn… path:3,HTML,1,BODY,95,DIV,1,DIV selector:body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk snippet:<div id="onetrust-banner-sdk" class="otFlat bottom vertical-align-content ot-buttons-fw" tabindex="0" role="region" aria-label="Cookie banner" style="bottom: 0px;"> type:node] score:0.005392]]

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.

URLEst Savings
t-cf.bstatic.com/design-assets/assets/v3.155.1/fonts-brand/BookingBold.woff45 ms

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.

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:42.44 source:map[column:952749 line:8 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.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:208.232 source:map[type:text value:[unattributed]]] map[reflowTime:29.827 source:map[column:181193 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js urlProvider:network]] map[reflowTime:12.613 source:map[column:21384 line:1 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/18cad957.6daa46db.chunk.js urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:267.493 label:Time to first byte subpart:timeToFirstByte] map[duration:3673.219 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-P
nodeLabel: When you use Booking.com, we (Booking.com and our partners), use the following …
path: 3,HTML,1,BODY,95,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,P
selector: div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text > p
snippet: <p>

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.

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.

URLTransfer SizeDuration
cf.bstatic.com/psb/capla/static/css/22e5ddc2.30126616.chunk.css4.9 KiB
cf.bstatic.com/psb/capla/static/css/18cad957.dbb1072a.chunk.css747 B
cf.bstatic.com/psb/capla/static/css/dc32f6b7.2e0b6b1e.chunk.css4.0 KiB
cf.bstatic.com/psb/capla/static/css/client.4dd9ab5f.css32.1 KiB171 ms
cf.bstatic.com/psb/capla/static/css/c10242aa.faa5c279.chunk.css923 B
cf.bstatic.com/psb/capla/static/css/75453889.58087283.chunk.css1.4 KiB
cf.bstatic.com/psb/capla/static/css/81da5f32.89ae8754.chunk.css3.1 KiB
cf.bstatic.com/psb/capla/static/css/b9a82cb8.28b83939.chunk.css3.0 KiB171 ms
cf.bstatic.com/psb/capla/static/css/c44295c5.11649901.chunk.css1.6 KiB
cdn.cookielaw.org/consent/3ea94870-d4b1-483a-b1d2-faf1d982bb31/OtAutoBlock.js3.5 KiB772 ms

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

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/square400/419372798.jpg?k=92a922970e4...44.0 KiB23.2 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/484071500.jpg?k=a248e8142ee...40.4 KiB19.6 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/763974157.jpg?k=fdb526bf4e7...39.7 KiB18.9 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/482212553.jpg?k=9b1c8bc413c...39.4 KiB18.6 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/city/263x210/976567.jpg?k=635ee7930208ee145...17.3 KiB8.3 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/231063000.jpg?k=c23df08eb9a...15.7 KiB8.2 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square400/583437335.jpg?k=8ed6a567a99...29.0 KiB8.2 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/263x210/976553.jpg?k=c0215ada9920c9777...16.9 KiB7.9 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/263x210/967483.jpg?k=724c4eb3a36de3ca8...16.2 KiB7.3 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/159072045.jpg?k=fdcb154f159...14.6 KiB7.1 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/square400/757520990.jpg?k=bd2b7c9dec9...27.5 KiB6.7 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/263x210/970081.jpg?k=8e9cc1455b67b63a6...15.5 KiB6.6 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/535448355.jpg?k=bbade08b595...13.5 KiB6.0 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/263x210/347307.jpg?k=93578765c78b0b79b...14.4 KiB5.4 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/263x210/724897.jpg?k=c6f6dc74d277c5adc...14.4 KiB5.4 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/115856740.jpg?k=f325b9c4c75...12.7 KiB5.2 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/726896209.jpg?k=fcba68e39b4...12.2 KiB4.7 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/263x210/976560.jpg?k=860549c314b03e11d...13.4 KiB4.4 KiB
div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/hotel/square240/485915270.jpg?k=59cfbd9dcea...11.8 KiB4.3 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.

TTI

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.

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

Estimated savings: 928 ms
URLTime Spent
www.booking.com/928 ms
www.booking.com/?chal_t=1775320711898&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

ElementLayout shift score
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.191
Rent a car Hundreds of cars and 24/7 customer service Book a private airport ta… div#main_container > div#main_content > div.tabbed-nav--content > div.css-loading-hidden
0.177
Rent a car Hundreds of cars and 24/7 customer service Book a private airport ta… div#main_container > div#main_content > div.tabbed-nav--content > div.css-loading-hidden
0.177
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.012
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.005
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.004
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.003
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.003
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.003
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.002
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.002
Manage cookie settings When you use Booking.com, we (Booking.com and our partn… body#b2indexPage > div#onetrust-consent-sdk > div#onetrust-banner-sdk
0.002

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.

Estimated savings: 240 ms 130.9 KiB
URLTransfer SizeEst Savings
/mobile/css/core_cloudfront_sd.iq_ltr/f870110eb8a677f2393...64.7 KiB62.2 KiB
xx.bstatic.com/psb/cross-sell/mobile/cross-sell.6eb3225.css41.5 KiB40.9 KiB
cf.bstatic.com/psb/capla/static/css/client.4dd9ab5f.css31.6 KiB27.8 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.

Estimated savings: 6.2 s 1.9 MiB
URLTransfer SizeEst Savings
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js494.8 KiB290.9 KiB
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...494.6 KiB247.5 KiB
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js223.8 KiB199.6 KiB
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js408.0 KiB178.1 KiB
cf.bstatic.com/psb/capla/static/js/02d40367.dbdf1114.chunk.js222.2 KiB154.6 KiB
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...176.4 KiB136.6 KiB
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js122.3 KiB110.6 KiB
/pagead/managed/js/gpt/m202604010101/pubads_impl.js?cb=31...182.4 KiB105.2 KiB
cf.bstatic.com/psb/capla/static/js/dceb1327.c26ff665.chunk.js121.2 KiB77.8 KiB
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js158.9 KiB75.5 KiB
accounts.google.com/gsi/client92.7 KiB69.5 KiB
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js114.3 KiB68.8 KiB
xx.bstatic.com/psb/cross-sell/mobile/en-us_cross-sell.be2d261.js130.1 KiB62.9 KiB
cf.bstatic.com/psb/capla/static/js/22e5ddc2.9484dedc.chunk.js138.8 KiB41.3 KiB
cf.bstatic.com/psb/capla/static/js/ac3443c9.52570aea.chunk.js68.8 KiB33.5 KiB
cf.bstatic.com/psb/capla/static/js/b9a82cb8.3e27c878.chunk.js37.3 KiB32.6 KiB
/mobile/js/lp_cloudfront_sd/86a3922ffbc29832892b2b55a9326...40.1 KiB27.5 KiB
cf.bstatic.com/psb/capla/static/js/8067d7e4.cc24c312.chunk.js25.3 KiB24.7 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.

URLTotal CPU TimeScript EvaluationScript Parse
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js9.1 s7.4 s281 ms
Unattributable4.9 s2.6 s0.0 ms
www.booking.com/?chal_t=1775320711898&force_referer=4.1 s374 ms139 ms
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js1.8 s1.5 s238 ms
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...1.4 s1.0 s267 ms
cf.bstatic.com/psb/capla/static/js/c10242aa.4df8644d.chunk.js1.2 s1.1 s3.5 ms
cf.bstatic.com/psb/capla/static/js/remoteEntry.e4dedb9e.client.js746 ms741 ms3.8 ms
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...668 ms461 ms141 ms
/pagead/managed/js/gpt/m202604010101/pubads_impl.js?cb=31...387 ms252 ms96 ms
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js366 ms182 ms95 ms
xx.bstatic.com/psb/cross-sell/mobile/en-us_cross-sell.be2d261.js268 ms182 ms82 ms
cf.bstatic.com/psb/capla/static/js/02d40367.dbdf1114.chunk.js231 ms6.2 ms223 ms
cdn.cookielaw.org/consent/3ea94870-d4b1-483a-b1d2-faf1d982bb31/OtAutoBlock.js215 ms180 ms2.2 ms
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js169 ms41 ms117 ms
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js165 ms6.5 ms158 ms
/mobile/js/core-deps-inlinedet_cloudfront_sd/97754f5bf295...148 ms120 ms19 ms
accounts.google.com/gsi/client144 ms99 ms43 ms
pagead2.googlesyndication.com/tag/js/gpt.js139 ms121 ms17 ms
cf.bstatic.com/psb/capla/static/js/22e5ddc2.9484dedc.chunk.js131 ms2.8 ms128 ms
cf.bstatic.com/psb/capla/static/js/dceb1327.c26ff665.chunk.js113 ms4.0 ms108 ms
cf.bstatic.com/psb/capla/static/js/7c8fc42b.da6b8b76.chunk.js112 ms107 ms3.0 ms
ep2.adtrafficquality.google/sodar/sodar2.js93 ms83 ms5.1 ms
/mobile/js/lp_cloudfront_sd/86a3922ffbc29832892b2b55a9326...91 ms27 ms64 ms
cf.bstatic.com/psb/capla/static/js/ac3443c9.52570aea.chunk.js82 ms15 ms65 ms
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js78 ms9.4 ms67 ms
www.booking.com/75 ms61 ms6.0 ms
cf.bstatic.com/psb/capla/static/js/0ccbe2db.9dfd90a2.chunk.js59 ms45 ms11 ms
cdn.cookielaw.org/scripttemplates/otSDKStub.js58 ms39 ms6.5 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

CategoryTime Spent
Script Evaluation17.2 s
Other3.8 s
Script Parsing & Compilation2.8 s
Style & Layout2.8 s
Rendering822 ms
Garbage Collection554 ms
Parse HTML & CSS332 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

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.

URLTransfer Size
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...495.3 KiB
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js495.2 KiB
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js408.5 KiB
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js224.3 KiB
cf.bstatic.com/psb/capla/static/js/02d40367.dbdf1114.chunk.js222.7 KiB
/pagead/managed/js/gpt/m202604010101/pubads_impl.js?cb=31...182.4 KiB
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817...176.9 KiB
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js159.4 KiB
www.booking.com/?chal_t=1775320711898&force_referer=149.3 KiB
cf.bstatic.com/psb/capla/static/js/22e5ddc2.9484dedc.chunk.js139.3 KiB

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

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
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 11 user timings
●Avoid long main-thread tasks 20 long tasks found
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 140 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 260 ms
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
96

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.

Failing Elements
Book now, pay at the property div.aa225776f2 > div.f6e3a11b0d > div.b779265b5e > h3#:r1j:

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.

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
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

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.

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 a private airport taxi 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
Utrecht 46 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Amersfoort 56 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Apeldoorn 91 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Arnhem 97 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Zwolle 98 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Leeuwarden 118 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Eindhoven 120 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Emmen 158 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Groningen 158 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
Maastricht 185 km away div#:r1u: > div#:r21: > div.ee4cb4021c > a.de576f5064
EUR 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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[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
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
○`[accesskey]` values are unique
○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.
○Identical links have the same purpose.
○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.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
/mobile/js/core_cloudfront_sd/89ab0674156f2cd6570d3aef817... line 42, col 26393

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

SourceDescription
www.booking.com/favicon.ico
Failed to load resource: the server responded with a status of 404 ()
www.booking.com/?chal_t=1775320711898&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.

URLMap URL
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...
cf.bstatic.com/psb/capla/static/js/remoteEntry.e4dedb9e.client.js/internal-static/capla/static/js/remoteEntry.e4dedb9e.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.e07cadeb.client.js/internal-static/capla/static/js/remoteEntry.e07cadeb.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.d7514a06.client.js/internal-static/capla/static/js/remoteEntry.d7514a06.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.b509c1ee.client.js/internal-static/capla/static/js/remoteEntry.b509c1ee.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.ac1c3fc3.client.js/internal-static/capla/static/js/remoteEntry.ac1c3fc3.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.9fd8d3e9.client.js/internal-static/capla/static/js/remoteEntry.9fd8d3e9.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.998ad7c3.client.js/internal-static/capla/static/js/remoteEntry.998ad7c3.cli...
cf.bstatic.com/psb/capla/static/js/remoteEntry.918e2282.client.js/internal-static/capla/static/js/remoteEntry.918e2282.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.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...
/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/e3c2db23.97b4452d.chunk.js/internal-static/capla/static/js/e3c2db23.97b4452d.chunk....
cf.bstatic.com/psb/capla/static/js/dceb1327.c26ff665.chunk.js/internal-static/capla/static/js/dceb1327.c26ff665.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/dbb49855.dc37a44a.chunk.js/internal-static/capla/static/js/dbb49855.dc37a44a.chunk....
cf.bstatic.com/psb/capla/static/js/da7ccad2.e37427ad.chunk.js/internal-static/capla/static/js/da7ccad2.e37427ad.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.d62c3905.chunk.js/internal-static/capla/static/js/d3416aac.d62c3905.chunk....
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.jsistatic.booking.com/internal-static/capla/static/js/client.b20bbad3.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/c44295c5.0cc14364.chunk.js/internal-static/capla/static/js/c44295c5.0cc14364.chunk....
cf.bstatic.com/psb/capla/static/js/c3922a16.ccdf6ce0.chunk.js/internal-static/capla/static/js/c3922a16.ccdf6ce0.chunk....
cf.bstatic.com/psb/capla/static/js/c10242aa.4df8644d.chunk.js/internal-static/capla/static/js/c10242aa.4df8644d.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/9a3d71ce.b0815ac4.chunk.js/internal-static/capla/static/js/9a3d71ce.b0815ac4.chunk....
cf.bstatic.com/psb/capla/static/js/967ac2a3.9dfaecd2.chunk.js/internal-static/capla/static/js/967ac2a3.9dfaecd2.chunk....
cf.bstatic.com/psb/capla/static/js/8e69b76c.fd58d443.chunk.js/internal-static/capla/static/js/8e69b76c.fd58d443.chunk....
cf.bstatic.com/psb/capla/static/js/8aa49fb3.084b7383.chunk.js/internal-static/capla/static/js/8aa49fb3.084b7383.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.84a13cf5.chunk.js/internal-static/capla/static/js/7e8161ba.84a13cf5.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....
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js/internal-static/capla/static/js/782ad794.ea2f5e5f.chunk....
cf.bstatic.com/psb/capla/static/js/776687d9.9611196a.chunk.js/internal-static/capla/static/js/776687d9.9611196a.chunk....
cf.bstatic.com/psb/capla/static/js/75453889.96234075.chunk.js/internal-static/capla/static/js/75453889.96234075.chunk....
cf.bstatic.com/psb/capla/static/js/6f2ed949.9b89276d.chunk.js/internal-static/capla/static/js/6f2ed949.9b89276d.chunk....
cf.bstatic.com/psb/capla/static/js/68dc9f6c.d03d3515.chunk.js/internal-static/capla/static/js/68dc9f6c.d03d3515.chunk....
cf.bstatic.com/psb/capla/static/js/5aeeadf2.2c82954d.chunk.js/internal-static/capla/static/js/5aeeadf2.2c82954d.chunk....
cf.bstatic.com/psb/capla/static/js/58c58ec7.a6073bd7.chunk.js/internal-static/capla/static/js/58c58ec7.a6073bd7.chunk....
cf.bstatic.com/psb/capla/static/js/5115337f.ed71eaa8.chunk.js/internal-static/capla/static/js/5115337f.ed71eaa8.chunk....
cf.bstatic.com/psb/capla/static/js/4bd23c76.3322fd14.chunk.js/internal-static/capla/static/js/4bd23c76.3322fd14.chunk....
cf.bstatic.com/psb/capla/static/js/4a89d2db.5245783d.chunk.js/internal-static/capla/static/js/4a89d2db.5245783d.chunk....
cf.bstatic.com/psb/capla/static/js/4a89d2db.5245783d.chunk.js/internal-static/capla/static/js/4a89d2db.5245783d.chunk....
cf.bstatic.com/psb/capla/static/js/3c74eed1.fe878dcd.chunk.js/internal-static/capla/static/js/3c74eed1.fe878dcd.chunk....
cf.bstatic.com/psb/capla/static/js/3b87e4b5.643537f7.chunk.js/internal-static/capla/static/js/3b87e4b5.643537f7.chunk....
cf.bstatic.com/psb/capla/static/js/36086793.b1610857.chunk.js/internal-static/capla/static/js/36086793.b1610857.chunk....
cf.bstatic.com/psb/capla/static/js/349461af.a5b3694d.chunk.js/internal-static/capla/static/js/349461af.a5b3694d.chunk....
cf.bstatic.com/psb/capla/static/js/31e40d2f.9157a0b3.chunk.js/internal-static/capla/static/js/31e40d2f.9157a0b3.chunk....
cf.bstatic.com/psb/capla/static/js/2d3eab5a.5431a1f9.chunk.js/internal-static/capla/static/js/2d3eab5a.5431a1f9.chunk....
cf.bstatic.com/psb/capla/static/js/2aa64dbf.61d2333a.chunk.js/internal-static/capla/static/js/2aa64dbf.61d2333a.chunk....
cf.bstatic.com/psb/capla/static/js/27bbaa9c.7d3741f1.chunk.js/internal-static/capla/static/js/27bbaa9c.7d3741f1.chunk....
cf.bstatic.com/psb/capla/static/js/22e5ddc2.9484dedc.chunk.js/internal-static/capla/static/js/22e5ddc2.9484dedc.chunk....
cf.bstatic.com/psb/capla/static/js/1d87ea19.ccb49a50.chunk.js/internal-static/capla/static/js/1d87ea19.ccb49a50.chunk....
cf.bstatic.com/psb/capla/static/js/1cd7d89c.f5a49457.chunk.js/internal-static/capla/static/js/1cd7d89c.f5a49457.chunk....
cf.bstatic.com/psb/capla/static/js/18cad957.6daa46db.chunk.js/internal-static/capla/static/js/18cad957.6daa46db.chunk....
cf.bstatic.com/psb/capla/static/js/0ccbe2db.9dfd90a2.chunk.js/internal-static/capla/static/js/0ccbe2db.9dfd90a2.chunk....
cf.bstatic.com/psb/capla/static/js/0c57ed87.d7744771.chunk.js/internal-static/capla/static/js/0c57ed87.d7744771.chunk....
cf.bstatic.com/psb/capla/static/js/0a098284.8e6bee2d.chunk.js/internal-static/capla/static/js/0a098284.8e6bee2d.chunk....
cf.bstatic.com/psb/capla/static/js/09fb2abd.531fc132.chunk.js/internal-static/capla/static/js/09fb2abd.531fc132.chunk....
cf.bstatic.com/psb/capla/static/js/02d40367.dbdf1114.chunk.js/internal-static/capla/static/js/02d40367.dbdf1114.chunk....
●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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

28
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.75 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

5.93 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.66 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.098

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.30 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

6.59 s

Detailed Report

Audit breakdown by category with detailed findings.

28

Performance

Insights

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

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

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

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

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 ms19.0 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Tr...0.0 ms18.8 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Fr...0.0 ms10.9 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Re...0.0 ms5.6 KiB
bstatic.com/libs/google-one-tap/0.8.0/google-one-tap.min.js0.0 ms4.1 KiB
/design-assets/assets/v3.176.0/illustrations-traveller/Cu...0.0 ms4.0 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js86400.0 s9.1 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

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.

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:68.352 source:map[column:952749 line:8 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.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:260.114 source:map[type:text value:[unattributed]]] map[reflowTime:1.119 source:map[column:181193 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js urlProvider:network]] map[reflowTime:1.725 source:map[column:380865 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js urlProvider:network]] map[reflowTime:26.503 source:map[column:382501 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js urlProvider:network]] map[reflowTime:1.449 source:map[column:214928 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js urlProvider:network]] map[reflowTime:37.556 source:map[column:224318 line:7 type:source-location url:https://cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:585.542 label:Time to first byte subpart:timeToFirstByte] map[duration:5385.354 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-P
nodeLabel: When you use Booking.com, we (Booking.com and our partners), use the following …
path: 1,HTML,1,BODY,60,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,P
selector: div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text > p
snippet: <p>

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.

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

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

URLResource SizeEst Savings
div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/600x600/977262.jpg?k=2b852648c76ccaff8...101.6 KiB72.3 KiB
div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/600x600/976525.jpg?k=28ab37ad52e0b672e...79.3 KiB58.6 KiB
div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/600x600/968210.jpg?k=cfa9bb22d18a0a3c7...75.9 KiB55.2 KiB
div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/600x600/999940.jpg?k=b6b68c8eac202b494...75.9 KiB46.6 KiB
div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb div.e6fe25fa54 > div.cfbcaf5985 > picture.b7a691c583 > img.f6c12c77eb
/xdata/images/city/600x600/977242.jpg?k=72bfe23a6d7a496e0...41.7 KiB22.0 KiB
div.f6e3a11b0d > div.c3bdfd4ac2 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.c3bdfd4ac2 > picture.b7a691c583 > img.f6c12c77eb
/design-assets/assets/v3.176.0/illustrations-traveller/Tr...18.2 KiB17.7 KiB
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...18.4 KiB16.9 KiB
div.f6e3a11b0d > div.c3bdfd4ac2 > picture.b7a691c583 > img.f6c12c77eb div.f6e3a11b0d > div.c3bdfd4ac2 > picture.b7a691c583 > img.f6c12c77eb
/design-assets/assets/v3.176.0/illustrations-traveller/Fr...10.3 KiB6.8 KiB

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.

URLTransfer SizeDuration
cf.bstatic.com/psb/capla/static/css/36a3a7eb.b8b054be.chunk.css1.5 KiB
cf.bstatic.com/psb/capla/static/css/2bda684b.5ede15fb.chunk.css734 B
cf.bstatic.com/psb/capla/static/css/ca95e682.b48e0f75.chunk.css1.0 KiB
cf.bstatic.com/psb/capla/static/css/9a3d71ce.73fde67d.chunk.css1.4 KiB
cf.bstatic.com/psb/capla/static/css/38055147.ba0a9427.chunk.css1.5 KiB
cf.bstatic.com/psb/capla/static/css/09fb2abd.275826ae.chunk.css883 B
cf.bstatic.com/psb/capla/static/css/8067d7e4.dbb1072a.chunk.css746 B
cf.bstatic.com/psb/capla/static/css/18cad957.dbb1072a.chunk.css744 B
cf.bstatic.com/psb/capla/static/css/2ab355fc.6cc431cc.chunk.css1.0 KiB
cf.bstatic.com/psb/capla/static/css/81da5f32.89ae8754.chunk.css3.1 KiB
cf.bstatic.com/psb/capla/static/css/b9a82cb8.28b83939.chunk.css3.0 KiB
cf.bstatic.com/psb/capla/static/css/dc32f6b7.2e0b6b1e.chunk.css4.0 KiB
cf.bstatic.com/psb/capla/static/css/782ad794.af081227.chunk.css1.3 KiB
cf.bstatic.com/psb/capla/static/css/31e40d2f.1e84e7a6.chunk.css1.1 KiB
cf.bstatic.com/psb/capla/static/css/dceb1327.db0950d9.chunk.css3.8 KiB
cf.bstatic.com/psb/capla/static/css/7e8161ba.cdb36326.chunk.css1.5 KiB
cf.bstatic.com/psb/capla/static/css/27bbaa9c.e65278ae.chunk.css1.0 KiB
cf.bstatic.com/psb/capla/static/css/0d919837.59e18d47.chunk.css6.6 KiB
cf.bstatic.com/psb/capla/static/css/0fdff3cd.2d5a1a4b.chunk.css835 B
cf.bstatic.com/psb/capla/static/css/1d87ea19.fb53800c.chunk.css1.1 KiB
cf.bstatic.com/psb/capla/static/css/c2edf532.4b5a0e7f.chunk.css2.9 KiB61 ms
cf.bstatic.com/psb/capla/static/css/12888182.7b57f4b9.chunk.css1.9 KiB
cf.bstatic.com/psb/capla/static/css/ba07265b.4eea9547.chunk.css903 B
cf.bstatic.com/psb/capla/static/css/967ac2a3.7b8bcbee.chunk.css812 B
cf.bstatic.com/psb/capla/static/css/31b24ea7.7433a648.chunk.css898 B
cf.bstatic.com/psb/capla/static/css/6e9462b2.58087283.chunk.css1.4 KiB
cf.bstatic.com/psb/capla/static/css/client.4dd9ab5f.css32.1 KiB438 ms
cf.bstatic.com/psb/capla/static/css/c43f530f.6af8176f.chunk.css3.4 KiB
cdn.cookielaw.org/consent/3ea94870-d4b1-483a-b1d2-faf1d982bb31/OtAutoBlock.js3.5 KiB220 ms

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

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

Estimated savings: 440 ms
URLTime Spent
www.booking.com/440 ms
www.booking.com/?chal_t=1775320755150&force_referer=0.0 ms

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.

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.

TTI

Diagnostics

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

Estimated savings: 700 ms 1.5 MiB
URLTransfer SizeEst Savings
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js505.7 KiB299.9 KiB
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js223.8 KiB195.9 KiB
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js408.0 KiB176.3 KiB
cf.bstatic.com/psb/capla/static/js/c43f530f.ac8c6c17.chunk.js222.0 KiB169.2 KiB
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js158.9 KiB128.4 KiB
/pagead/managed/js/gpt/m202604020101/pubads_impl.js?cb=31...182.6 KiB103.8 KiB
cf.bstatic.com/psb/capla/static/js/dceb1327.c26ff665.chunk.js121.2 KiB77.8 KiB
accounts.google.com/gsi/client92.7 KiB70.5 KiB
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js122.3 KiB69.4 KiB
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js114.3 KiB68.8 KiB
cf.bstatic.com/psb/capla/static/js/c2edf532.72ade7a4.chunk.js55.8 KiB41.2 KiB
cf.bstatic.com/psb/capla/static/js/0d919837.6d744df1.chunk.js126.5 KiB38.7 KiB
cf.bstatic.com/psb/capla/static/js/b9a82cb8.3e27c878.chunk.js37.3 KiB32.6 KiB
cf.bstatic.com/psb/capla/static/js/18cad957.6daa46db.chunk.js25.3 KiB24.8 KiB
cf.bstatic.com/psb/capla/static/js/12888182.3e8e7acb.chunk.js25.3 KiB21.0 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.

URLTotal CPU TimeScript EvaluationScript Parse
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js2.4 s1.9 s92 ms
www.booking.com/?chal_t=1775320755150&force_referer=821 ms56 ms3.3 ms
Unattributable646 ms150 ms0.0 ms
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js402 ms342 ms57 ms
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...391 ms271 ms60 ms
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js324 ms258 ms59 ms
cf.bstatic.com/psb/capla/static/js/remoteEntry.e4dedb9e.client.js175 ms167 ms1.3 ms
/pagead/managed/js/gpt/m202604020101/pubads_impl.js?cb=31...168 ms108 ms32 ms
/psb/capla/static/js/node_modules_bookingcom_bui-react_co...145 ms143 ms0.2 ms
cf.bstatic.com/psb/capla/static/js/36086793.b1610857.chunk.js119 ms103 ms0.5 ms
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js91 ms42 ms21 ms
accounts.google.com/gsi/client54 ms36 ms17 ms
cf.bstatic.com/psb/capla/static/js/c43f530f.ac8c6c17.chunk.js52 ms1.0 ms51 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

CategoryTime Spent
Script Evaluation3.8 s
Other869 ms
Style & Layout632 ms
Script Parsing & Compilation600 ms
Rendering172 ms
Garbage Collection131 ms
Parse HTML & CSS79 ms

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.

Estimated savings: 0.0 ms 26.0 KiB
URLTransfer SizeEst Savings
cf.bstatic.com/psb/capla/static/css/client.4dd9ab5f.css31.6 KiB26.0 KiB

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

URLTransfer Size
/__challenge_h78IRKX3kpQxScCExxShBNwRUlb/d8c14d4960ca/a18...506.4 KiB
d8c14d4960ca.edge.sdk.awswaf.com/d8c14d4960ca/a18a4859af9c/challenge.js506.1 KiB
cf.bstatic.com/psb/capla/static/js/client.b20bbad3.js408.5 KiB
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js224.3 KiB
cf.bstatic.com/psb/capla/static/js/c43f530f.ac8c6c17.chunk.js222.5 KiB
/pagead/managed/js/gpt/m202604020101/pubads_impl.js?cb=31...182.6 KiB
cf.bstatic.com/psb/capla/static/js/dc32f6b7.6d16fe38.chunk.js159.4 KiB
cf.bstatic.com/psb/capla/static/js/0d919837.6d744df1.chunk.js127.0 KiB
cf.bstatic.com/psb/capla/static/js/81da5f32.6979dec3.chunk.js122.8 KiB
cf.bstatic.com/psb/capla/static/js/dceb1327.c26ff665.chunk.js121.6 KiB

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

●Layout shift culprits
●Document request latency
●Optimize DOM size
●Font display
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 6 user timings
●Avoid long main-thread tasks 19 long tasks found
●Avoid non-composited animations 1 animated element found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 160 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 580 ms
●Avoid large layout shifts 14 layout shifts found
○INP breakdown
○LCP request discovery
100

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.

○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
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[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
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○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.
○Image elements have `[alt]` attributes
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○Links are distinguishable without relying on color.
○Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
○List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○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.
96

Best Practices

General

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

SourceDescription
www.booking.com/favicon.ico
Failed to load resource: the server responded with a status of 404 ()
www.booking.com/?chal_t=1775320755150&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.

URLMap URL
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cf.bstatic.com/psb/capla/static/js/remoteEntry.e4dedb9e.client.js/internal-static/capla/static/js/remoteEntry.e4dedb9e.cli...
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cf.bstatic.com/psb/capla/static/js/remoteEntry.9fd8d3e9.client.js/internal-static/capla/static/js/remoteEntry.9fd8d3e9.cli...
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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...
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cf.bstatic.com/psb/capla/static/js/client.b20bbad3.jsistatic.booking.com/internal-static/capla/static/js/client.b20bbad3.js.map
cf.bstatic.com/psb/capla/static/js/cfaf9a2b.10abc7e0.chunk.js/internal-static/capla/static/js/cfaf9a2b.10abc7e0.chunk....
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/c43f530f.ac8c6c17.chunk.js/internal-static/capla/static/js/c43f530f.ac8c6c17.chunk....
cf.bstatic.com/psb/capla/static/js/c2edf532.72ade7a4.chunk.js/internal-static/capla/static/js/c2edf532.72ade7a4.chunk....
cf.bstatic.com/psb/capla/static/js/ba07265b.fbd3d648.chunk.js/internal-static/capla/static/js/ba07265b.fbd3d648.chunk....
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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/79628b93.471815c3.chunk.js/internal-static/capla/static/js/79628b93.471815c3.chunk....
cf.bstatic.com/psb/capla/static/js/782ad794.ea2f5e5f.chunk.js/internal-static/capla/static/js/782ad794.ea2f5e5f.chunk....
cf.bstatic.com/psb/capla/static/js/6e9462b2.ad5ce518.chunk.js/internal-static/capla/static/js/6e9462b2.ad5ce518.chunk....
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cf.bstatic.com/psb/capla/static/js/5115337f.ed71eaa8.chunk.js/internal-static/capla/static/js/5115337f.ed71eaa8.chunk....
cf.bstatic.com/psb/capla/static/js/4bd23c76.3322fd14.chunk.js/internal-static/capla/static/js/4bd23c76.3322fd14.chunk....
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cf.bstatic.com/psb/capla/static/js/3c74eed1.fe878dcd.chunk.js/internal-static/capla/static/js/3c74eed1.fe878dcd.chunk....
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cf.bstatic.com/psb/capla/static/js/31e40d2f.9157a0b3.chunk.js/internal-static/capla/static/js/31e40d2f.9157a0b3.chunk....
cf.bstatic.com/psb/capla/static/js/31b24ea7.e59cd291.chunk.js/internal-static/capla/static/js/31b24ea7.e59cd291.chunk....
cf.bstatic.com/psb/capla/static/js/2bda684b.81c37d52.chunk.js/internal-static/capla/static/js/2bda684b.81c37d52.chunk....
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cf.bstatic.com/psb/capla/static/js/1d87ea19.ccb49a50.chunk.js/internal-static/capla/static/js/1d87ea19.ccb49a50.chunk....
cf.bstatic.com/psb/capla/static/js/18cad957.6daa46db.chunk.js/internal-static/capla/static/js/18cad957.6daa46db.chunk....
cf.bstatic.com/psb/capla/static/js/15334676.b1e91b19.chunk.js/internal-static/capla/static/js/15334676.b1e91b19.chunk....
cf.bstatic.com/psb/capla/static/js/12888182.3e8e7acb.chunk.js/internal-static/capla/static/js/12888182.3e8e7acb.chunk....
cf.bstatic.com/psb/capla/static/js/0fdff3cd.91d30e8b.chunk.js/internal-static/capla/static/js/0fdff3cd.91d30e8b.chunk....
cf.bstatic.com/psb/capla/static/js/0d919837.6d744df1.chunk.js/internal-static/capla/static/js/0d919837.6d744df1.chunk....
cf.bstatic.com/psb/capla/static/js/0a098284.8e6bee2d.chunk.js/internal-static/capla/static/js/0a098284.8e6bee2d.chunk....
cf.bstatic.com/psb/capla/static/js/09fb2abd.531fc132.chunk.js/internal-static/capla/static/js/09fb2abd.531fc132.chunk....
●Uses HTTPS
●Avoids deprecated APIs
●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
●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
○Ensure proper origin isolation with COOP
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
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○Image elements have `[alt]` attributes

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