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PageSpeed Insights
PageSpeed Insights
This site uses cookies from Google to deliver its services and to analyze traffic.
Report from Feb 16, 2025, 6:00:44 PM
Discover what your real users are experiencing
Core Web Vitals Assessment: Failed
Largest Contentful Paint (LCP)
2.6 s
Page LoadsGood (≤ 2.5 s)72%Needs Improvement (2.5 s - 4 s)16%Poor (> 4 s)11%75th Percentile - 2.6 sCore Web Vital
Interaction to Next Paint (INP)
281 ms
Page LoadsGood (≤ 200 ms)61%Needs Improvement (200 ms - 500 ms)28%Poor (> 500 ms)11%75th Percentile - 281 msCore Web Vital
Cumulative Layout Shift (CLS)
0.03
Page LoadsGood (≤ 0.1)86%Needs Improvement (0.1 - 0.25)9%Poor (> 0.25)5%75th Percentile - 0.03Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
2 s
Page LoadsGood (≤ 1.8 s)68%Needs Improvement (1.8 s - 3 s)22%Poor (> 3 s)10%75th Percentile - 2 s 
Time to First Byte (TTFB)
1.2 s
Page LoadsGood (≤ 0.8 s)54%Needs Improvement (0.8 s - 1.8 s)36%Poor (> 1.8 s)10%75th Percentile - 1.2 sExperimental
Latest 28-day collection period
Various mobile devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Core Web Vitals Assessment: Failed
Largest Contentful Paint (LCP)
2.6 s
Page LoadsGood (≤ 2.5 s)73%Needs Improvement (2.5 s - 4 s)20%Poor (> 4 s)7%75th Percentile - 2.6 sCore Web Vital
Interaction to Next Paint (INP)
335 ms
Page LoadsGood (≤ 200 ms)61%Needs Improvement (200 ms - 500 ms)22%Poor (> 500 ms)17%75th Percentile - 335 msCore Web Vital
Cumulative Layout Shift (CLS)
0
Page LoadsGood (≤ 0.1)92%Needs Improvement (0.1 - 0.25)6%Poor (> 0.25)2%75th Percentile - 0Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
1.8 s
Page LoadsGood (≤ 1.8 s)74%Needs Improvement (1.8 s - 3 s)18%Poor (> 3 s)8%75th Percentile - 1.8 s 
Time to First Byte (TTFB)
1.2 s
Page LoadsGood (≤ 0.8 s)48%Needs Improvement (0.8 s - 1.8 s)41%Poor (> 1.8 s)10%75th Percentile - 1.2 sExperimental
Latest 28-day collection period
Various mobile devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Diagnose performance issues
39 FCP+2LCP+4TBT+4CLS+25SI+4 Performance
Values are estimated and may vary. The performance score is calculated directly from these metrics.See calculator.
0–49 50–89 90–100
Final Screenshot
Metrics
First Contentful Paint
4.0 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric.
Largest Contentful Paint
5.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric
Total Blocking Time
1,550 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric.
Cumulative Layout Shift
0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more about the Cumulative Layout Shift metric.
Speed Index
6.5 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric.
  • Captured at Feb 16, 2025, 6:00 PM UTC
  • Emulated Moto G Power with Lighthouse 12.2.3
    Unthrottled CPU/Memory Power: 450 CPU throttling: 1.2x slowdown (Simulated) Screen emulation: 412x823, DPR 1.75 Axe version: 4.10.2
  • Single page session
    This data is taken from a single page session, as opposed to field data summarizing many sessions.
  • Initial page load
  • Slow 4G throttling
    Network throttling: 150 ms TCP RTT, 1,638.4 kb/s throughput (Simulated) Browser location: North America
  • Using HeadlessChromium 133.0.6943.53 with lr
    User agent (network): "Mozilla/5.0 (Linux; Android 11; moto g power (2022)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36"
Screenshot
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Show audits relevant to:
Diagnostics
Minimize main-thread work 7.4 s
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 workTBT
Category
Time Spent
Script Evaluation
4,864 ms
Style & Layout
973 ms
Other
575 ms
Garbage Collection
425 ms
Script Parsing & Compilation
297 ms
Rendering
144 ms
Parse HTML & CSS
106 ms
Reduce the impact of third-party code Third-party code blocked the main thread for 1,660 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading. Learn how to minimize third-party impact.TBT
Third-Party
Transfer Size
Main-Thread Blocking Time
Booking.com
content
4,490 KiB
1,119 ms
…js/client.cd422f95.js
(cf.bstatic.com)
277 KiB
946 ms
1 KiB
85 ms
2 KiB
36 ms
41 KiB
29 ms
2 KiB
13 ms
30 KiB
6 ms
158 KiB
1 ms
5 KiB
1 ms
9 KiB
0 ms
7 KiB
0 ms
8 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
7 KiB
0 ms
8 KiB
0 ms
201 KiB
0 ms
163 KiB
0 ms
143 KiB
0 ms
142 KiB
0 ms
140 KiB
0 ms
137 KiB
0 ms
132 KiB
0 ms
114 KiB
0 ms
93 KiB
0 ms
93 KiB
0 ms
87 KiB
0 ms
85 KiB
0 ms
85 KiB
0 ms
84 KiB
0 ms
75 KiB
0 ms
74 KiB
0 ms
70 KiB
0 ms
68 KiB
0 ms
65 KiB
0 ms
64 KiB
0 ms
62 KiB
0 ms
62 KiB
0 ms
53 KiB
0 ms
53 KiB
0 ms
50 KiB
0 ms
49 KiB
0 ms
48 KiB
0 ms
48 KiB
0 ms
45 KiB
0 ms
45 KiB
0 ms
42 KiB
0 ms
41 KiB
0 ms
41 KiB
0 ms
39 KiB
0 ms
39 KiB
0 ms
38 KiB
0 ms
37 KiB
0 ms
36 KiB
0 ms
33 KiB
0 ms
33 KiB
0 ms
33 KiB
0 ms
32 KiB
0 ms
31 KiB
0 ms
23 KiB
0 ms
22 KiB
0 ms
22 KiB
0 ms
21 KiB
0 ms
21 KiB
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20 KiB
0 ms
20 KiB
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19 KiB
0 ms
19 KiB
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19 KiB
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19 KiB
0 ms
18 KiB
0 ms
17 KiB
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17 KiB
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17 KiB
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17 KiB
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17 KiB
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17 KiB
0 ms
16 KiB
0 ms
16 KiB
0 ms
16 KiB
0 ms
15 KiB
0 ms
14 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
12 KiB
0 ms
12 KiB
0 ms
12 KiB
0 ms
11 KiB
0 ms
11 KiB
0 ms
11 KiB
0 ms
10 KiB
0 ms
10 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
6 KiB
0 ms
6 KiB
0 ms
6 KiB
0 ms
5 KiB
0 ms
5 KiB
0 ms
5 KiB
0 ms
4 KiB
0 ms
4 KiB
0 ms
4 KiB
0 ms
4 KiB
0 ms
4 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
…images-flags/Gb@3x.png
(t-cf.bstatic.com)
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
Google Tag Manager
tag-manager
847 KiB
203 ms
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
137 KiB
90 ms
/gtag/js?id=…
(www.googletagmanager.com)
127 KiB
51 ms
/gtag/destination?id=…
(www.googletagmanager.com)
106 KiB
22 ms
96 KiB
19 ms
/gtag/destination?id=…
(www.googletagmanager.com)
89 KiB
14 ms
/gtag/destination?id=…
(www.googletagmanager.com)
98 KiB
5 ms
/gtag/destination?id=…
(www.googletagmanager.com)
98 KiB
2 ms
2 KiB
0 ms
/gtag/destination?id=…
(www.googletagmanager.com)
95 KiB
0 ms
Google/Doubleclick Ads
ad
279 KiB
172 ms
…m202…/pubads_impl.js?cb=31090461
(securepubads.g.doubleclick.net)
161 KiB
172 ms
…topics/topics_frame.html
(securepubads.g.doubleclick.net)
29 KiB
0 ms
…js/gpt.js
(securepubads.g.doubleclick.net)
34 KiB
0 ms
…m202…/gpt
(securepubads.g.doubleclick.net)
24 KiB
0 ms
/bg/JE1ZY4u1f….js
(pagead2.googlesyndication.com)
21 KiB
0 ms
…html/container.html
(162235b002c87699a0fd52136696e2d7.safeframe.googlesyndication.com)
4 KiB
0 ms
/gampad/ads?pvsid=…
(securepubads.g.doubleclick.net)
1 KiB
0 ms
/gampad/ads?pvsid=…
(securepubads.g.doubleclick.net)
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
…conversion/988…?random=…
(pagead2.googlesyndication.com)
1 KiB
0 ms
/pagead/ping?e=4&d=ChCCAQ0I_…..
(pagead2.googlesyndication.com)
0 KiB
0 ms
0 KiB
0 ms
/ccm/collect?en=…
(pagead2.googlesyndication.com)
0 KiB
0 ms
awswaf.com
375 KiB
161 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
1 KiB
161 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
364 KiB
0 ms
…a18a4859af9c/telemetry
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
9 KiB
0 ms
…a18a4859af9c/verify
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
1 KiB
0 ms
adtrafficquality.google
26 KiB
0 ms
…232/runner.html
(ep2.adtrafficquality.google)
6 KiB
0 ms
13 KiB
0 ms
/sodar/sodar2.js
(ep2.adtrafficquality.google)
7 KiB
0 ms
/pagead/sodar?id=…
(ep1.adtrafficquality.google)
0 KiB
0 ms
/generate_204?uxgdRw
(ep2.adtrafficquality.google)
0 KiB
0 ms
Other Google APIs/SDKs
utility
89 KiB
0 ms
…api2/aframe
(www.google.com)
2 KiB
0 ms
/gsi/client
(accounts.google.com)
86 KiB
0 ms
/gsi/style
(accounts.google.com)
1 KiB
0 ms
Optanon
consent-provider
153 KiB
0 ms
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
109 KiB
0 ms
27 KiB
0 ms
8 KiB
0 ms
…assets/otCommonStyles.css
(cdn.cookielaw.org)
5 KiB
0 ms
3 KiB
0 ms
…geo/location
(geolocation.onetrust.com)
0 KiB
0 ms
Pinterest
social
30 KiB
0 ms
23 KiB
0 ms
/ct/core.js
(s.pinimg.com)
2 KiB
0 ms
/user/?tid=…
(ct.pinterest.com)
1 KiB
0 ms
/user/?event=…
(ct.pinterest.com)
1 KiB
0 ms
/v3/?event=…
(ct.pinterest.com)
1 KiB
0 ms
/ct.html
(ct.pinterest.com)
1 KiB
0 ms
/v3/?tid=…
(ct.pinterest.com)
1 KiB
0 ms
Google Analytics
analytics
30 KiB
0 ms
/analytics.js
(www.google-analytics.com)
21 KiB
0 ms
…ua/ec.js
(www.google-analytics.com)
2 KiB
0 ms
/j/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/j/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/g/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/g/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
Bing Ads
ad
16 KiB
0 ms
/bat.js
(bat.bing.com)
15 KiB
0 ms
…action/15005356.js
(bat.bing.com)
1 KiB
0 ms
/actionp/0?ti=…
(bat.bing.com)
0 KiB
0 ms
/actionp/0?ti=…
(bat.bing.com)
0 KiB
0 ms
/actionp/0?ti=…
(bat.bing.com)
0 KiB
0 ms
/actionp/0?ti=…
(bat.bing.com)
0 KiB
0 ms
Yahoo! JAPAN Ads
ad
11 KiB
0 ms
…cv/ytag.js
(s.yimg.jp)
11 KiB
0 ms
bing.net
3 KiB
0 ms
/action/0?ti=…
(bat.bing.net)
0 KiB
0 ms
/action/0?ti=…
(bat.bing.net)
0 KiB
0 ms
/action/0?ti=…
(bat.bing.net)
0 KiB
0 ms
/action/0?ti=…
(bat.bing.net)
0 KiB
0 ms
/action/0?ti=…
(bat.bing.net)
0 KiB
0 ms
/action/0?ti=…
(bat.bing.net)
0 KiB
0 ms
/actionp/0?ti=…
(bat.bing.net)
0 KiB
0 ms
google.com
2 KiB
0 ms
/about/enterprise/
(marketingplatform.google.com)
2 KiB
0 ms
RTB House AdPilot
ad
1 KiB
0 ms
/tags?type=…
(creativecdn.com)
1 KiB
0 ms
/tags?type=…
(creativecdn.com)
0 KiB
0 ms
Google AMP
analytics
1 KiB
0 ms
1 KiB
0 ms
Reduce JavaScript execution time 4.4 s
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.TBT
URL
Total CPU Time
Script Evaluation
Script Parse
Booking.com
content
3,334 ms
2,520 ms
44 ms
…js/client.cd422f95.js
(cf.bstatic.com)
2,767 ms
2,027 ms
23 ms
156 ms
144 ms
0 ms
93 ms
51 ms
6 ms
88 ms
74 ms
11 ms
87 ms
86 ms
0 ms
79 ms
75 ms
4 ms
63 ms
63 ms
0 ms
booking.com
1st party
986 ms
79 ms
22 ms
986 ms
79 ms
22 ms
Unattributable
846 ms
397 ms
0 ms
Unattributable
846 ms
397 ms
0 ms
Google Tag Manager
tag-manager
741 ms
678 ms
50 ms
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
265 ms
245 ms
12 ms
/gtag/js?id=…
(www.googletagmanager.com)
103 ms
96 ms
7 ms
/gtag/destination?id=…
(www.googletagmanager.com)
74 ms
68 ms
5 ms
71 ms
65 ms
5 ms
/gtag/destination?id=…
(www.googletagmanager.com)
66 ms
60 ms
6 ms
/gtag/destination?id=…
(www.googletagmanager.com)
57 ms
52 ms
5 ms
/gtag/destination?id=…
(www.googletagmanager.com)
54 ms
49 ms
5 ms
/gtag/destination?id=…
(www.googletagmanager.com)
50 ms
43 ms
7 ms
awswaf.com
425 ms
375 ms
22 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
425 ms
375 ms
22 ms
Google/Doubleclick Ads
ad
250 ms
226 ms
9 ms
…m202…/pubads_impl.js?cb=31090461
(securepubads.g.doubleclick.net)
250 ms
226 ms
9 ms
Largest Contentful Paint element 5,830 ms
This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint elementLCP
Element
Find your next stay
<h1 id="form_search_h1" class="b-no-tap-highlight " style="">
Phase
% of LCP
Timing
TTFB
10%
600 ms
Load Delay
0%
0 ms
Load Time
0%
0 ms
Render Delay
90%
5,230 ms
Eliminate render-blocking resources Potential savings of 870 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn how to eliminate render-blocking resources.LCPFCP
URL
Transfer Size
Potential Savings
Booking.com
content
37.4 KiB
450 ms
4.7 KiB
150 ms
32.8 KiB
300 ms
Avoid multiple page redirects Potential savings of 760 ms
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.LCPFCP
URL
Time Spent
booking.com
1st party
760 ms
760 ms
0 ms
Reduce unused JavaScript Potential savings of 1,835 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.LCPFCP
URL
Transfer Size
Potential Savings
Booking.com
content
1,557.7 KiB
1,025.0 KiB
200.5 KiB
188.9 KiB
156.9 KiB
122.6 KiB
…js/client.cd422f95.js
(cf.bstatic.com)
276.2 KiB
121.3 KiB
52.7 KiB
52.3 KiB
72.9 KiB
49.1 KiB
141.2 KiB
47.0 KiB
47.2 KiB
46.9 KiB
91.9 KiB
45.5 KiB
49.2 KiB
43.5 KiB
44.5 KiB
37.1 KiB
74.2 KiB
35.4 KiB
61.5 KiB
32.3 KiB
32.6 KiB
30.2 KiB
40.5 KiB
27.6 KiB
38.6 KiB
27.0 KiB
35.4 KiB
26.9 KiB
31.4 KiB
25.4 KiB
48.7 KiB
24.0 KiB
21.6 KiB
21.1 KiB
40.1 KiB
21.0 KiB
Google Tag Manager
tag-manager
836.6 KiB
403.1 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
93.8 KiB
57.6 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
96.9 KiB
57.2 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
96.9 KiB
57.2 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
104.6 KiB
51.6 KiB
/gtag/js?id=…
(www.googletagmanager.com)
125.5 KiB
51.2 KiB
95.4 KiB
46.5 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
87.8 KiB
43.6 KiB
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
135.6 KiB
38.2 KiB
awswaf.com
363.7 KiB
185.1 KiB
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
363.7 KiB
185.1 KiB
Google/Doubleclick Ads
ad
160.2 KiB
88.5 KiB
…m202…/pubads_impl.js?cb=31090461
(securepubads.g.doubleclick.net)
160.2 KiB
88.5 KiB
Optanon
consent-provider
108.2 KiB
70.8 KiB
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
108.2 KiB
70.8 KiB
Other Google APIs/SDKs
utility
84.9 KiB
62.9 KiB
/gsi/client
(accounts.google.com)
84.9 KiB
62.9 KiB
Reduce unused CSS Potential savings of 112 KiB
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.LCPFCP
URL
Transfer Size
Potential Savings
Booking.com
content
120.1 KiB
111.8 KiB
51.9 KiB
49.4 KiB
36.2 KiB
34.3 KiB
32.0 KiB
28.1 KiB
Avoid an excessive DOM size 3,628 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows. Learn how to avoid an excessive DOM size.TBT
Statistic
Element
Value
Total DOM Elements
3,628
Maximum DOM Depth
Exceptional
<div class="ac4a7896c7">
24
Maximum Child Elements
body#b2indexPage
<body id="b2indexPage" class="bookings2 index colada en b_lang_en new_cta not_webview supportsfixed seve…" data-bui-theme="traveller_ex-light">
142
Image elements do not have explicit width and height
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensionsCLS
URL
Booking.com
content
div.c82435a4b8 > a.a83ed08757 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/psb/capla/static/js/../../static/media/bh_aw_cpg_ma…" role="presentation" loading="lazy">
Serve images in next-gen formats Potential savings of 55 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. Learn more about modern image formats.LCPFCP
URL
Resource Size
Potential Savings
Booking.com
content
105.4 KiB
55.1 KiB
div.c82435a4b8 > a.a83ed08757 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/psb/capla/static/js/../../static/media/bh_aw_cpg_ma…" role="presentation" loading="lazy">
60.9 KiB
40.5 KiB
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f b1a5e281e7" src="https://t-cf.bstatic.com/design-assets/assets/v3.138.1/illustrations-trave…" srcset="https://t-cf.bstatic.com/design-assets/assets/v3.138.1/illustrations-trave…" alt="" role="presentation" loading="lazy">
44.5 KiB
14.6 KiB
Serve static assets with an efficient cache policy 82 resources found
A long cache lifetime can speed up repeat visits to your page. Learn more about efficient cache policies.
URL
Cache TTL
Transfer Size
Booking.com
content
2,698 KiB
None
45 KiB
None
42 KiB
None
19 KiB
None
11 KiB
None
4 KiB
…images-flags/Gb@3x.png
(t-cf.bstatic.com)
None
1 KiB
7d
93 KiB
7d
37 KiB
30d
163 KiB
30d
158 KiB
30d
143 KiB
30d
140 KiB
30d
137 KiB
30d
132 KiB
30d
114 KiB
30d
93 KiB
30d
87 KiB
30d
85 KiB
30d
85 KiB
30d
84 KiB
30d
70 KiB
30d
68 KiB
30d
65 KiB
30d
64 KiB
30d
53 KiB
30d
48 KiB
30d
41 KiB
30d
39 KiB
30d
31 KiB
30d
30 KiB
30d
21 KiB
30d
21 KiB
30d
20 KiB
30d
20 KiB
30d
19 KiB
30d
19 KiB
30d
18 KiB
30d
17 KiB
30d
17 KiB
30d
17 KiB
30d
17 KiB
30d
17 KiB
30d
17 KiB
30d
16 KiB
30d
16 KiB
30d
16 KiB
30d
15 KiB
30d
14 KiB
30d
13 KiB
30d
13 KiB
30d
13 KiB
30d
13 KiB
30d
13 KiB
30d
12 KiB
30d
11 KiB
30d
10 KiB
30d
10 KiB
30d
9 KiB
30d
9 KiB
30d
9 KiB
30d
8 KiB
30d
8 KiB
30d
7 KiB
30d
6 KiB
30d
6 KiB
30d
5 KiB
30d
5 KiB
30d
5 KiB
30d
4 KiB
30d
3 KiB
30d
3 KiB
30d
2 KiB
30d
2 KiB
30d
2 KiB
30d
1 KiB
Optanon
consent-provider
118 KiB
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
1d
109 KiB
1d
8 KiB
Pinterest
social
26 KiB
/ct/core.js
(s.pinimg.com)
2h
2 KiB
14d
23 KiB
Google Analytics
analytics
23 KiB
…ua/ec.js
(www.google-analytics.com)
1h
2 KiB
/analytics.js
(www.google-analytics.com)
2h
21 KiB
Yahoo! JAPAN Ads
ad
11 KiB
…cv/ytag.js
(s.yimg.jp)
10m
11 KiB
Ensure text remains visible during webfont load
Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading. Learn more about font-display.
URL
Potential Savings
Booking.com
content
10 ms
10 ms
Properly size images Potential savings of 1,259 KiB
Serve images that are appropriately-sized to save cellular data and improve load time. Learn how to size images.LCPFCP
URL
Resource Size
Potential Savings
Booking.com
content
1,702.5 KiB
1,259.1 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/154543781.webp?k=847…" alt="" role="presentation" loading="lazy">
162.9 KiB
131.3 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/283036728.webp?k=b86…" alt="" role="presentation" loading="lazy">
142.4 KiB
112.5 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/187855604.webp?k=0ab…" alt="" role="presentation" loading="lazy">
139.2 KiB
112.2 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/280950287.webp?k=d5b…" alt="" role="presentation" loading="lazy">
136.6 KiB
108.3 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/611064739.webp?k=4db…" alt="" role="presentation" loading="lazy">
131.4 KiB
99.2 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330218941.webp?k=6da89f…" role="presentation" loading="lazy">
113.8 KiB
76.7 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/132452060.webp?k=f9c…" alt="" role="presentation" loading="lazy">
83.6 KiB
66.3 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330242405.webp?k=12ed20…" role="presentation" loading="lazy">
92.4 KiB
62.3 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330217393.webp?k=f524b7…" role="presentation" loading="lazy">
86.9 KiB
58.5 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330243165.webp?k=041076…" role="presentation" loading="lazy">
84.3 KiB
56.8 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330238778.webp?k=291f84…" role="presentation" loading="lazy">
84.2 KiB
56.7 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/126764303.webp?k=46a…" alt="" role="presentation" loading="lazy">
69.5 KiB
54.8 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/hotel/max1024x768/178421525.webp?k=6c9…" alt="" role="presentation" loading="lazy">
67.7 KiB
54.1 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/329955964.webp?k=c59fc2…" role="presentation" loading="lazy">
64.3 KiB
43.3 KiB
div.c82435a4b8 > a.a83ed08757 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/psb/capla/static/js/../../static/media/bh_aw_cpg_ma…" role="presentation" loading="lazy">
60.9 KiB
43.2 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330221486.webp?k=772ce2…" role="presentation" loading="lazy">
63.4 KiB
42.7 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330218232.webp?k=33eb4e…" role="presentation" loading="lazy">
47.7 KiB
32.2 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330216085.webp?k=cda71e…" role="presentation" loading="lazy">
40.3 KiB
27.2 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/xphoto/490x871/330237911.webp?k=6c2cb2…" role="presentation" loading="lazy">
30.8 KiB
20.8 KiB
Defer offscreen images Potential savings of 5 KiB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive. Learn how to defer offscreen images.LCPFCP
URL
Resource Size
Potential Savings
Booking.com
content
5.1 KiB
5.1 KiB
Booking
<img src="https://cf.bstatic.com/mobile/images/gta/booking-app-logo-128/8c0a29a0f865…" alt="Booking">
5.1 KiB
5.1 KiB
Avoid serving legacy JavaScript to modern browsers Potential savings of 16 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn how to use modern JavaScriptLCPFCP
URL
Potential Savings
Booking.com
content
8.8 KiB
8.7 KiB
@babel/plugin-transform-classes
Object.entries
Array.prototype.find
0.0 KiB
@babel/plugin-transform-classes
…js/client.cd422f95.js
(cf.bstatic.com)
0.0 KiB
@babel/plugin-transform-classes
Optanon
consent-provider
6.9 KiB
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
6.9 KiB
Array.prototype.fill
Avoid enormous network payloads Total size was 6,622 KiB
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
URL
Transfer Size
Booking.com
content
1,224.0 KiB
…js/client.cd422f95.js
(cf.bstatic.com)
277.0 KiB
201.3 KiB
163.4 KiB
157.8 KiB
142.9 KiB
142.0 KiB
139.7 KiB
awswaf.com
364.4 KiB
…a18a4859af9c/challenge.js
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
364.4 KiB
Google/Doubleclick Ads
ad
161.0 KiB
…m202…/pubads_impl.js?cb=31090461
(securepubads.g.doubleclick.net)
161.0 KiB
booking.com
1st party
139.5 KiB
139.5 KiB
Avoid long main-thread tasks 20 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay. Learn how to avoid long main-thread tasksTBT
URL
Start Time
Duration
Booking.com
content
1,687 ms
…js/client.cd422f95.js
(cf.bstatic.com)
30,166 ms
259 ms
…js/client.cd422f95.js
(cf.bstatic.com)
15,016 ms
232 ms
…js/client.cd422f95.js
(cf.bstatic.com)
33,542 ms
226 ms
…js/client.cd422f95.js
(cf.bstatic.com)
15,316 ms
201 ms
17,416 ms
144 ms
…js/client.cd422f95.js
(cf.bstatic.com)
15,517 ms
133 ms
18,379 ms
86 ms
…js/client.cd422f95.js
(cf.bstatic.com)
11,293 ms
86 ms
…js/client.cd422f95.js
(cf.bstatic.com)
33,810 ms
84 ms
19,816 ms
79 ms
…js/client.cd422f95.js
(cf.bstatic.com)
11,510 ms
79 ms
…js/client.cd422f95.js
(cf.bstatic.com)
29,266 ms
78 ms
booking.com
1st party
381 ms
1,284 ms
116 ms
1,400 ms
93 ms
1,008 ms
92 ms
1,204 ms
80 ms
Google Tag Manager
tag-manager
241 ms
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
18,946 ms
140 ms
/gtag/js?id=…
(www.googletagmanager.com)
23,586 ms
101 ms
Google/Doubleclick Ads
ad
222 ms
…m202…/pubads_impl.js?cb=31090461
(securepubads.g.doubleclick.net)
30,449 ms
222 ms
awswaf.com
211 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
16,044 ms
211 ms
Initial server response time was short Root document took 320 ms
Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.LCPFCP
URL
Time Spent
booking.com
1st party
320 ms
320 ms
User Timing marks and measures 14 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences. Learn more about User Timing marks.
Name
Type
Start Time
Duration
b-stylesheets
Measure
0.00 ms
862.40 ms
b-fold
Measure
0.00 ms
980.40 ms
b-pre-scripts
Measure
0.00 ms
987.50 ms
b-post-scripts
Measure
0.00 ms
1,146.90 ms
TARGETING_PARAMETERS_LATENCY
Measure
3,263.36 ms
1,075.03 ms
TARGETING_PARAMETERS_LATENCY
Measure
3,263.36 ms
1,078.47 ms
REMOTE_TARGETING_REQUESTED
Mark
3,236.88 ms
AD_COMPONENT_CREATED
Mark
3,237.86 ms
REMOTE_TARGETING_REQUESTED
Mark
3,263.36 ms
AD_COMPONENT_CREATED
Mark
3,263.56 ms
REMOTE_TARGETING_SUCCESS
Mark
4,338.38 ms
REMOTE_TARGETING_SUCCESS
Mark
4,341.83 ms
AD_SLOT_REQUESTED
Mark
5,409.12 ms
AD_SLOT_REQUESTED
Mark
5,411.81 ms
Avoid non-composited animations 30 animated elements found
Animations which are not composited can be janky and increase CLS. Learn how to avoid non-composited animationsCLS
Element
Name
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
Avoid chaining critical requests 9 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. Learn how to avoid chaining critical requests.
Maximum critical path latency: 965.88 ms
Initial Navigation
- 15.468 ms, 4.69 KiB
- 12.958 ms, 41.74 KiB
- 15.201 ms, 2.86 KiB
- 15.728 ms, 1.38 KiB
- 15.292 ms, 1.29 KiB
- 16.235 ms, 3.03 KiB
- 15.709 ms, 3.13 KiB
- 16.869 ms, 5.41 KiB
- 14.65 ms, 1.97 KiB
More information about the performance of your application. These numbers don't directly affect the Performance score.
Passed audits (14)
Show Hide
Minify CSS
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.LCPFCP
Minify JavaScript
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.LCPFCP
Efficiently encode images
Optimized images load faster and consume less cellular data. Learn how to efficiently encode images.LCPFCP
Enable text compression
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes. Learn more about text compression.LCPFCP
Preconnect to required origins
Consider adding preconnect or dns-prefetch resource hints to establish early connections to important third-party origins. Learn how to preconnect to required origins.LCPFCP
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. Consider using MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save network bytes. Learn more about efficient video formatsLCPFCP
Remove duplicate modules in JavaScript bundles
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity. LCPFCP
Preload Largest Contentful Paint image
If the LCP element is dynamically added to the page, you should preload the image in order to improve LCP. Learn more about preloading LCP elements.LCP
Lazy load third-party resources with facades
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade.TBT
Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint. Learn more about optimal lazy loading.LCP
Avoid large layout shifts
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 CLSCLS
Uses passive listeners to improve scrolling performance
Consider marking your touch and wheel event listeners as passive to improve your page's scroll performance. Learn more about adopting passive event listeners.
Avoids document.write()
For users on slow connections, external scripts dynamically injected via document.write() can delay page load by tens of seconds. Learn how to avoid document.write().
Has a <meta name="viewport"> tag with width or initial-scale
A <meta name="viewport"> not only optimizes your app for mobile screen sizes, but also prevents a 300 millisecond delay to user input. Learn more about using the viewport meta tag.
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.
ARIA
[aria-*] attributes do not match their roles
Each ARIA role supports a specific subset of aria-* attributes. Mismatching these invalidates the aria-* attributes. Learn how to match ARIA attributes to their roles.
Failing Elements
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
[aria-*] attributes do not have valid values
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.
Failing Elements
Romance
<button id="ROMANCE-tab-trigger" data-testid="webcore-filter-carousel-tab-trigger" role="tab" aria-current="page" aria-selected="true" aria-controls="ROMANCE" tabindex="0" type="button" class="a83ed08757 f3441ccb97 ec66406250">
Uses ARIA roles on incompatible elements
Many HTML elements can only be assigned certain ARIA roles. Using ARIA roles where they are not allowed can interfere with the accessibility of the web page. Learn more about ARIA roles.
Failing Elements
Check-in date Sun 16 Feb 2025 Check-out date Mon 17 Feb 2025 Adults 1 2 3 4 5 6…
<form class="b942c4707a a7ab5b4be2" action="https://www.booking.com/searchresults.en-gb.html" method="GET" role="region" aria-label="Search properties" id=":r8:">
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Navigation
Heading elements are not in a sequentially-descending order
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
<h3 id=":rm:" class="e1eebb6a1e e0a7dcceb5">
These are opportunities to improve keyboard navigation in your application.
Additional items to manually check (10)
Show Hide
Interactive controls are keyboard focusable
Custom interactive controls are keyboard focusable and display a focus indicator. Learn how to make custom controls focusable.
Interactive elements indicate their purpose and state
Interactive elements, such as links and buttons, should indicate their state and be distinguishable from non-interactive elements. Learn how to decorate interactive elements with affordance hints.
The page has a logical tab order
Tabbing through the page follows the visual layout. Users cannot focus elements that are offscreen. Learn more about logical tab ordering.
Visual order on the page follows DOM order
DOM order matches the visual order, improving navigation for assistive technology. Learn more about DOM and visual ordering.
User focus is not accidentally trapped in a region
A user can tab into and out of any control or region without accidentally trapping their focus. Learn how to avoid focus traps.
The user's focus is directed to new content added to the page
If new content, such as a dialog, is added to the page, the user's focus is directed to it. Learn how to direct focus to new content.
HTML5 landmark elements are used to improve navigation
Landmark elements (<main>, <nav>, etc.) are used to improve the keyboard navigation of the page for assistive technology. Learn more about landmark elements.
Offscreen content is hidden from assistive technology
Offscreen content is hidden with display: none or aria-hidden=true. Learn how to properly hide offscreen content.
Custom controls have associated labels
Custom interactive controls have associated labels, provided by aria-label or aria-labelledby. Learn more about custom controls and labels.
Custom controls have ARIA roles
Custom interactive controls have appropriate ARIA roles. Learn how to add roles to custom controls.
These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Passed audits (26)
Show Hide
[aria-hidden="true"] is not present on the document <body>
Assistive technologies, like screen readers, work inconsistently when aria-hidden="true" is set on the document <body>. Learn how aria-hidden affects the document body.
[role]s have all required [aria-*] attributes
Some ARIA roles have required attributes that describe the state of the element to screen readers. Learn more about roles and required attributes.
Elements with an ARIA [role] that require children to contain a specific [role] have all required children.
Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.
[role]s are contained by their required parent element
Some ARIA child roles must be contained by specific parent roles to properly perform their intended accessibility functions. Learn more about ARIA roles and required parent element.
[aria-*] attributes are valid and not misspelled
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid names. Learn more about valid ARIA attributes.
Buttons have an accessible name
When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.
Image elements have [alt] attributes
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the alt attribute.
[user-scalable="no"] is not used in the <meta name="viewport"> element and the [maximum-scale] attribute is not less than 5.
Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.
button, link, and menuitem elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to make command elements more accessible.
ARIA attributes are used as specified for the element's role
Some ARIA attributes are only allowed on an element under certain conditions. Learn more about conditional ARIA attributes.
[aria-hidden="true"] elements do not contain focusable descendents
Focusable descendents within an [aria-hidden="true"] element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how aria-hidden affects focusable elements.
Elements use only permitted ARIA attributes
Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.
[role] values are valid
ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.
Background and foreground colors have a sufficient contrast ratio
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Document has a <title> element
The title gives screen reader users an overview of the page, and search engine users rely on it heavily to determine if a page is relevant to their search. Learn more about document titles.
<html> element has a [lang] attribute
If a page doesn't specify a lang attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the lang attribute.
<html> element has a valid value for its [lang] attribute
Specifying a valid BCP 47 language helps screen readers announce text properly. Learn how to use the lang attribute.
Form elements have associated labels
Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.
Lists contain only <li> elements and script supporting elements (<script> and <template>).
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
List items (<li>) are contained within <ul>, <ol> or <menu> parent elements
Screen readers require list items (<li>) to be contained within a parent <ul>, <ol> or <menu> to be announced properly. Learn more about proper list structure.
Select elements have associated label elements.
Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the select element.
No element has a [tabindex] value greater than 0
A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the tabindex attribute.
Touch targets have sufficient size and spacing.
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.
Deprecated ARIA roles were not used
Deprecated ARIA roles may not be processed correctly by assistive technology. Learn more about deprecated ARIA roles.
Image elements do not have [alt] attributes that are redundant text.
Informative elements should aim for short, descriptive alternative text. Alternative text that is exactly the same as the text adjacent to the link or image is potentially confusing for screen reader users, because the text will be read twice. Learn more about the alt attribute.
Not applicable (27)
Show Hide
[accesskey] values are unique
Access keys let users quickly focus a part of the page. For proper navigation, each access key must be unique. Learn more about access keys.
Elements with role="dialog" or role="alertdialog" have accessible names.
ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.
ARIA input fields have accessible names
When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.
ARIA meter elements have accessible names
When a meter element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to name meter elements.
ARIA progressbar elements have accessible names
When a progressbar element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to label progressbar elements.
Elements with the role=text attribute do not have focusable descendents.
Adding role=text around a text node split by markup enables VoiceOver to treat it as one phrase, but the element's focusable descendents will not be announced. Learn more about the role=text attribute.
ARIA toggle fields have accessible names
When a toggle field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about toggle fields.
ARIA tooltip elements have accessible names
When a tooltip element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to name tooltip elements.
ARIA treeitem elements have accessible names
When a treeitem element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about labeling treeitem elements.
The page contains a heading, skip link, or landmark region
Adding ways to bypass repetitive content lets keyboard users navigate the page more efficiently. Learn more about bypass blocks.
<dl>'s contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
When definition lists are not properly marked up, screen readers may produce confusing or inaccurate output. Learn how to structure definition lists correctly.
Definition list items are wrapped in <dl> elements
Definition list items (<dt> and <dd>) must be wrapped in a parent <dl> element to ensure that screen readers can properly announce them. Learn how to structure definition lists correctly.
ARIA IDs are unique
The value of an ARIA ID must be unique to prevent other instances from being overlooked by assistive technologies. Learn how to fix duplicate ARIA IDs.
No form fields have multiple labels
Form fields with multiple labels can be confusingly announced by assistive technologies like screen readers which use either the first, the last, or all of the labels. Learn how to use form labels.
<frame> or <iframe> elements have a title
Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.
<html> element has an [xml:lang] attribute with the same base language as the [lang] attribute.
If the webpage does not specify a consistent language, then the screen reader might not announce the page's text correctly. Learn more about the lang attribute.
Input buttons have discernible text.
Adding discernable and accessible text to input buttons may help screen reader users understand the purpose of the input button. Learn more about input buttons.
<input type="image"> elements have [alt] text
When an image is being used as an <input> button, providing alternative text can help screen reader users understand the purpose of the button. Learn about input image alt text.
The document does not use <meta http-equiv="refresh">
Users do not expect a page to refresh automatically, and doing so will move focus back to the top of the page. This may create a frustrating or confusing experience. Learn more about the refresh meta tag.
<object> elements have alternate text
Screen readers cannot translate non-text content. Adding alternate text to <object> elements helps screen readers convey meaning to users. Learn more about alt text for object elements.
Tables have different content in the summary attribute and <caption>.
The summary attribute should describe the table structure, while <caption> should have the onscreen title. Accurate table mark-up helps users of screen readers. Learn more about summary and caption.
Cells in a <table> element that use the [headers] attribute refer to table cells within the same table.
Screen readers have features to make navigating tables easier. Ensuring <td> cells using the [headers] attribute only refer to other cells in the same table may improve the experience for screen reader users. Learn more about the headers attribute.
<th> elements and elements with [role="columnheader"/"rowheader"] have data cells they describe.
Screen readers have features to make navigating tables easier. Ensuring table headers always refer to some set of cells may improve the experience for screen reader users. Learn more about table headers.
[lang] attributes have a valid value
Specifying a valid BCP 47 language on elements helps ensure that text is pronounced correctly by a screen reader. Learn how to use the lang attribute.
<video> elements contain a <track> element with [kind="captions"]
When a video provides a caption it is easier for deaf and hearing impaired users to access its information. Learn more about video captions.
General
Uses deprecated APIs 1 warning found
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Deprecation / Warning
Source
Booking.com
content
UnloadHandler
Browser errors were logged to the console
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
Source
Description
Other Google APIs/SDKs
utility
/gsi/client:71:488
(accounts.google.com)
[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.
Booking.com
content
Listener added for a 'DOMNodeInserted' mutation event. Support for this event type has been removed, and this event will no longer be fired. See https://chromestatus.com/feature/5083947249172480 for more information.
booking.com
1st party
Refused to execute script from 'https://pagead2.googlesyndication.com/pagead/conversion/988382855/?random=1739728851128&cv=11&fst=1739728851128&bg=ffffff&guid=ON&async=1&gtm=45be52d0v875529256z879615461za201zb9170518037&gcs=G100&gcd=13q3q3q3u5l1&dma_cps=-&dma=0&tag_exp=102067808~102482433~102539968~102558064~102587591~102605417~102640600~102658452&u_w=412&u_h=823&url=https%3A%2F%2Fwww.booking.com%2Findex.en-gb.html%3Flabel%3Dgen173nr-1BCAEoggI46AdIM1gEaJUCiAECmAEJuAEJyAER2AEB6AEBiAIBqAIDuALPz8i9BsACAdICJDU0ZmRiOWQ1LTA0MDAtNDc3Yy05YWY4LWJ...eACAQ%26sid%3Dbbe2f1da7169a1a2b29939e59c8a28df%26keep_landing%3D1%26sb_price_type%3Dtotal%26&label=ZgWTCPidsIkYEIeNptcD&hn=www.googleadservices.com&frm=0&tiba=Booking.com%20%7C%20Official%20site%20%7C%20The%20best%20hotels%2C%20flights%2C%20car%20rentals%20%26%20accommodations&value=0&bttype=purchase&npa=1&pscdl=denied&uaa=&uab=64&uafvl=Not(A%253ABrand%3B99.0.0.0%7CHeadlessChrome%3B133.0.6943.53%7CChromium%3B133.0.6943.53&uamb=1&uam=moto%20g%20power%20(2022)&uap=Android&uapv=11.0&uaw=0&fdr=Cw&rfmt=3&fmt=4' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.
The fetch of the config file resulted in a network error: ERR_NAME_NOT_RESOLVED
The provider's FedCM config file fetch resulted in an error response code.
Detected JavaScript libraries
All front-end JavaScript libraries detected on the page. Learn more about this JavaScript library detection diagnostic audit.
Name
Version
jQuery
2.2.4
Preact
10
Lo-Dash
4.17.21
Trust and Safety
Ensure CSP is effective against XSS attacks
A strong Content Security Policy (CSP) significantly reduces the risk of cross-site scripting (XSS) attacks. Learn how to use a CSP to prevent XSS
Description
Directive
Severity
No CSP found in enforcement mode
High
Passed audits (13)
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Uses HTTPS
All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.
Avoids third-party cookies
Chrome is moving towards a new experience that allows users to choose to browse without third-party cookies. Learn more about third-party cookies.
Allows users to paste into input fields
Preventing input pasting is a bad practice for the UX, and weakens security by blocking password managers.Learn more about user-friendly input fields.
Avoids requesting the geolocation permission on page load
Users are mistrustful of or confused by sites that request their location without context. Consider tying the request to a user action instead. Learn more about the geolocation permission.
Avoids requesting the notification permission on page load
Users are mistrustful of or confused by sites that request to send notifications without context. Consider tying the request to user gestures instead. Learn more about responsibly getting permission for notifications.
Displays images with correct aspect ratio
Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.
Serves images with appropriate resolution
Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.
Has a <meta name="viewport"> tag with width or initial-scale
A <meta name="viewport"> not only optimizes your app for mobile screen sizes, but also prevents a 300 millisecond delay to user input. Learn more about using the viewport meta tag.
Document uses legible font sizes 93.91% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px. Learn more about legible font sizes.
Source
Selector
% of Page Text
Font Size
Booking.com
content
.c8079eaf8c
5.55%
10px
Unattributable
Add'l illegible text
0.54%
< 12px
Legible text
93.91%
≥ 12px
Page has the HTML doctype
Specifying a doctype prevents the browser from switching to quirks-mode. Learn more about the doctype declaration.
Properly defines charset
A character encoding declaration is required. It can be done with a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header. Learn more about declaring the character encoding.
No issues in the Issues panel in Chrome Devtools
Issues logged to the Issues panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Page has valid source maps
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.
URL
Map URL
Booking.com
content
TypeError: Failed to fetch
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…js/client.cd422f95.js
(cf.bstatic.com)
…js/client.cd422f95.js.map
(istatic.booking.com)
TypeError: Failed to fetch
TypeError: Failed to fetch
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Google/Doubleclick Ads
ad
/bg/JE1ZY4u1f….js
(pagead2.googlesyndication.com)
Not applicable (1)
Show Hide
Redirects HTTP traffic to HTTPS
Make sure that you redirect all HTTP traffic to HTTPS in order to enable secure web features for all your users. Learn more.
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.
Additional items to manually check (1)
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Structured data is valid
Run these additional validators on your site to check additional SEO best practices.
Passed audits (10)
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Page isn’t blocked from indexing
Search engines are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.
Document has a <title> element
The title gives screen reader users an overview of the page, and search engine users rely on it heavily to determine if a page is relevant to their search. Learn more about document titles.
Document has a meta description
Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.
Page has successful HTTP status code
Pages with unsuccessful HTTP status codes may not be indexed properly. Learn more about HTTP status codes.
Links are crawlable
Search engines may use href attributes on links to crawl websites. Ensure that the href attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable
robots.txt is valid
If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.
Image elements have [alt] attributes
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the alt attribute.
Document has a valid hreflang
hreflang links tell search engines what version of a page they should list in search results for a given language or region. Learn more about hreflang.
Document has a valid rel=canonical
Canonical links suggest which URL to show in search results. Learn more about canonical links.
Discover what your real users are experiencing
Core Web Vitals Assessment: Failed
Largest Contentful Paint (LCP)
2.8 s
Page LoadsGood (≤ 2.5 s)66%Needs Improvement (2.5 s - 4 s)24%Poor (> 4 s)10%75th Percentile - 2.8 sCore Web Vital
Interaction to Next Paint (INP)
140 ms
Page LoadsGood (≤ 200 ms)82%Needs Improvement (200 ms - 500 ms)11%Poor (> 500 ms)7%75th Percentile - 140 msCore Web Vital
Cumulative Layout Shift (CLS)
0.09
Page LoadsGood (≤ 0.1)77%Needs Improvement (0.1 - 0.25)20%Poor (> 0.25)3%75th Percentile - 0.09Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
2.5 s
Page LoadsGood (≤ 1.8 s)47%Needs Improvement (1.8 s - 3 s)39%Poor (> 3 s)14%75th Percentile - 2.5 s 
Time to First Byte (TTFB)
1.6 s
Page LoadsGood (≤ 0.8 s)37%Needs Improvement (0.8 s - 1.8 s)46%Poor (> 1.8 s)17%75th Percentile - 1.6 sExperimental
Latest 28-day collection period
Various desktop devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Core Web Vitals Assessment: Failed
Largest Contentful Paint (LCP)
3 s
Page LoadsGood (≤ 2.5 s)57%Needs Improvement (2.5 s - 4 s)34%Poor (> 4 s)10%75th Percentile - 3 sCore Web Vital
Interaction to Next Paint (INP)
180 ms
Page LoadsGood (≤ 200 ms)78%Needs Improvement (200 ms - 500 ms)15%Poor (> 500 ms)7%75th Percentile - 180 msCore Web Vital
Cumulative Layout Shift (CLS)
0.05
Page LoadsGood (≤ 0.1)86%Needs Improvement (0.1 - 0.25)10%Poor (> 0.25)4%75th Percentile - 0.05Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
2.7 s
Page LoadsGood (≤ 1.8 s)28%Needs Improvement (1.8 s - 3 s)55%Poor (> 3 s)18%75th Percentile - 2.7 s 
Time to First Byte (TTFB)
1.4 s
Page LoadsGood (≤ 0.8 s)34%Needs Improvement (0.8 s - 1.8 s)53%Poor (> 1.8 s)12%75th Percentile - 1.4 sExperimental
Latest 28-day collection period
Various desktop devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Diagnose performance issues
33 FCP+9LCP+13TBT+0CLS+7SI+4 Performance
Values are estimated and may vary. The performance score is calculated directly from these metrics.See calculator.
0–49 50–89 90–100
Final Screenshot
Metrics
First Contentful Paint
0.9 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric.
Largest Contentful Paint
2.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric
Total Blocking Time
1,690 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric.
Cumulative Layout Shift
0.371
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more about the Cumulative Layout Shift metric.
Speed Index
2.6 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric.
  • Captured at Feb 16, 2025, 6:00 PM UTC
  • Emulated Desktop with Lighthouse 12.2.3
    Unthrottled CPU/Memory Power: 474 CPU throttling: 1x slowdown (Simulated) Screen emulation: 1350x940, DPR 1 Axe version: 4.10.2
  • Single page session
    This data is taken from a single page session, as opposed to field data summarizing many sessions.
  • Initial page load
  • Custom throttling
    Network throttling: 40 ms TCP RTT, 10,240 kb/s throughput (Simulated) Browser location: North America
  • Using HeadlessChromium 133.0.6943.53 with lr
    User agent (network): "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36"
Screenshot
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Show audits relevant to:
Diagnostics
Avoid large layout shifts 14 layout shifts found
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 CLSCLS
Element
Layout shift score
Offers Promotions, deals and special offers for you Save on stays worldwide Sta…
<div id="basiclayout" class="basiclayout_pe">
0.218
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f b1a5e281e7" src="https://t-cf.bstatic.com/design-assets/assets/v3.138.1/illustrations-trave…" srcset="https://t-cf.bstatic.com/design-assets/assets/v3.138.1/illustrations-trave…" alt="" role="presentation" loading="lazy">
Media element lacking an explicit size
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
Offers Promotions, deals and special offers for you Save on stays worldwide Sta…
<div id="basiclayout" class="basiclayout_pe">
0.152
a.a83ed08757 > div.a0670806ef > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://q-xx.bstatic.com/psb/capla/static/media/bh_aw_cpg_main_image.b4347…" role="presentation" loading="lazy">
Media element lacking an explicit size
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
::after
<::after>
0.001
::after
<::after>
0.001
::after
<::after>
0.001
::after
<::after>
0.000
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
::after
<::after>
0.000
::after
<::after>
0.000
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
A late network request adjusted the page layout
::after
<::after>
0.000
::after
<::after>
0.000
A late network request adjusted the page layout
::after
<::after>
0.000
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f ba6d792fd4" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAolBM…" alt="" role="presentation" loading="lazy">
Media element lacking an explicit size
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f ba6d792fd4" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAolBM…" alt="" role="presentation" loading="lazy">
Media element lacking an explicit size
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f ba6d792fd4" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAolBM…" alt="" role="presentation" loading="lazy">
Media element lacking an explicit size
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f ba6d792fd4" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAolBM…" alt="" role="presentation" loading="lazy">
Media element lacking an explicit size
div.c624d7469d > div.c624d7469d > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f ba6d792fd4" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAclBM…" alt="" role="presentation" loading="lazy">
Media element lacking an explicit size
::after
<::after>
0.000
::after
<::after>
0.000
/gsi/style
(accounts.google.com)
A late network request adjusted the page layout
::after
<::after>
0.000
/gsi/style
(accounts.google.com)
A late network request adjusted the page layout
Minimize main-thread work 8.3 s
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 workTBT
Category
Time Spent
Script Evaluation
5,008 ms
Style & Layout
1,533 ms
Other
821 ms
Script Parsing & Compilation
280 ms
Garbage Collection
276 ms
Rendering
215 ms
Parse HTML & CSS
119 ms
Reduce the impact of third-party code Third-party code blocked the main thread for 1,780 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading. Learn how to minimize third-party impact.TBT
Third-Party
Transfer Size
Main-Thread Blocking Time
Booking.com
content
4,229 KiB
1,285 ms
…js/client.cd422f95.js
(cf.bstatic.com)
277 KiB
1,039 ms
54 KiB
152 ms
41 KiB
62 ms
1 KiB
21 ms
2 KiB
10 ms
2 KiB
0 ms
9 KiB
0 ms
8 KiB
0 ms
201 KiB
0 ms
141 KiB
0 ms
115 KiB
0 ms
112 KiB
0 ms
101 KiB
0 ms
91 KiB
0 ms
89 KiB
0 ms
85 KiB
0 ms
77 KiB
0 ms
77 KiB
0 ms
75 KiB
0 ms
74 KiB
0 ms
72 KiB
0 ms
70 KiB
0 ms
66 KiB
0 ms
65 KiB
0 ms
64 KiB
0 ms
62 KiB
0 ms
62 KiB
0 ms
62 KiB
0 ms
61 KiB
0 ms
60 KiB
0 ms
58 KiB
0 ms
53 KiB
0 ms
53 KiB
0 ms
52 KiB
0 ms
50 KiB
0 ms
50 KiB
0 ms
50 KiB
0 ms
49 KiB
0 ms
48 KiB
0 ms
47 KiB
0 ms
46 KiB
0 ms
45 KiB
0 ms
42 KiB
0 ms
41 KiB
0 ms
41 KiB
0 ms
40 KiB
0 ms
40 KiB
0 ms
37 KiB
0 ms
36 KiB
0 ms
33 KiB
0 ms
33 KiB
0 ms
33 KiB
0 ms
33 KiB
0 ms
32 KiB
0 ms
32 KiB
0 ms
31 KiB
0 ms
29 KiB
0 ms
27 KiB
0 ms
25 KiB
0 ms
23 KiB
0 ms
22 KiB
0 ms
22 KiB
0 ms
21 KiB
0 ms
21 KiB
0 ms
20 KiB
0 ms
20 KiB
0 ms
19 KiB
0 ms
19 KiB
0 ms
19 KiB
0 ms
18 KiB
0 ms
17 KiB
0 ms
16 KiB
0 ms
16 KiB
0 ms
16 KiB
0 ms
15 KiB
0 ms
14 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
13 KiB
0 ms
12 KiB
0 ms
12 KiB
0 ms
12 KiB
0 ms
12 KiB
0 ms
11 KiB
0 ms
11 KiB
0 ms
11 KiB
0 ms
10 KiB
0 ms
10 KiB
0 ms
10 KiB
0 ms
10 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
9 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
8 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
7 KiB
0 ms
6 KiB
0 ms
6 KiB
0 ms
5 KiB
0 ms
5 KiB
0 ms
4 KiB
0 ms
4 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
3 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
…print/0cc4ce4….css
(cf.bstatic.com)
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
2 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
…images-flags/Gb@3x.png
(t-cf.bstatic.com)
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
Google Tag Manager
tag-manager
848 KiB
322 ms
/gtag/js?id=…
(www.googletagmanager.com)
127 KiB
101 ms
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
137 KiB
88 ms
/gtag/destination?id=…
(www.googletagmanager.com)
106 KiB
40 ms
/gtag/destination?id=…
(www.googletagmanager.com)
98 KiB
27 ms
/gtag/destination?id=…
(www.googletagmanager.com)
98 KiB
22 ms
94 KiB
17 ms
/gtag/destination?id=…
(www.googletagmanager.com)
89 KiB
14 ms
/gtag/destination?id=…
(www.googletagmanager.com)
95 KiB
13 ms
2 KiB
0 ms
/a?id=…
(www.googletagmanager.com)
1 KiB
0 ms
/a?id=…
(www.googletagmanager.com)
1 KiB
0 ms
/a?id=…
(www.googletagmanager.com)
1 KiB
0 ms
/a?id=…
(www.googletagmanager.com)
1 KiB
0 ms
/a?id=…
(www.googletagmanager.com)
1 KiB
0 ms
/a?id=…
(www.googletagmanager.com)
1 KiB
0 ms
awswaf.com
375 KiB
123 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
1 KiB
123 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
364 KiB
0 ms
…a18a4859af9c/telemetry
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
9 KiB
0 ms
…a18a4859af9c/verify
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
1 KiB
0 ms
Google/Doubleclick Ads
ad
315 KiB
54 ms
…m202…/pubads_impl.js?cb=31090462
(securepubads.g.doubleclick.net)
161 KiB
54 ms
…js/gpt.js
(securepubads.g.doubleclick.net)
34 KiB
0 ms
…topics/topics_frame.html
(securepubads.g.doubleclick.net)
29 KiB
0 ms
…m202…/gpt
(securepubads.g.doubleclick.net)
24 KiB
0 ms
/bg/bHuCxueCF….js
(pagead2.googlesyndication.com)
21 KiB
0 ms
…html/container.html
(e7e7573d93e3e3983eea43cc008380c8.safeframe.googlesyndication.com)
4 KiB
0 ms
…conversion/988…?random=…
(www.googleadservices.com)
3 KiB
0 ms
…viewthrou…/106…?random=…
(googleads.g.doubleclick.net)
3 KiB
0 ms
…viewthrou…/988…?random=…
(googleads.g.doubleclick.net)
3 KiB
0 ms
…viewthrou…/973…?random=…
(googleads.g.doubleclick.net)
3 KiB
0 ms
…viewthrou…/973…?random=…
(googleads.g.doubleclick.net)
3 KiB
0 ms
…viewthrou…/975…?random=…
(googleads.g.doubleclick.net)
3 KiB
0 ms
…viewthrou…/975…?random=…
(googleads.g.doubleclick.net)
3 KiB
0 ms
2 KiB
0 ms
…viewthrou…/988…?random=…
(googleads.g.doubleclick.net)
2 KiB
0 ms
2 KiB
0 ms
1 KiB
0 ms
/gampad/ads?pvsid=…
(securepubads.g.doubleclick.net)
1 KiB
0 ms
/gampad/ads?pvsid=…
(securepubads.g.doubleclick.net)
1 KiB
0 ms
1 KiB
0 ms
/j/collect?t=…
(stats.g.doubleclick.net)
1 KiB
0 ms
…ga/rul?tid=…
(td.doubleclick.net)
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
…rul/106…?random=…
(td.doubleclick.net)
1 KiB
0 ms
…rul/975…?random=…
(td.doubleclick.net)
1 KiB
0 ms
…rul/975…?random=…
(td.doubleclick.net)
1 KiB
0 ms
…rul/973…?random=…
(td.doubleclick.net)
1 KiB
0 ms
…rul/973…?random=…
(td.doubleclick.net)
1 KiB
0 ms
…rul/988…?random=…
(td.doubleclick.net)
1 KiB
0 ms
…rul/988…?random=…
(td.doubleclick.net)
1 KiB
0 ms
1 KiB
0 ms
0 KiB
0 ms
0 KiB
0 ms
/g/collect?v=…
(stats.g.doubleclick.net)
0 KiB
0 ms
adtrafficquality.google
26 KiB
0 ms
…232/runner.html
(ep2.adtrafficquality.google)
6 KiB
0 ms
13 KiB
0 ms
/sodar/sodar2.js
(ep2.adtrafficquality.google)
7 KiB
0 ms
/pagead/sodar?id=…
(ep1.adtrafficquality.google)
0 KiB
0 ms
/generate_204?aPWdfg
(ep2.adtrafficquality.google)
0 KiB
0 ms
Other Google APIs/SDKs
utility
93 KiB
0 ms
…api2/aframe
(www.google.com)
2 KiB
0 ms
/gsi/client
(accounts.google.com)
86 KiB
0 ms
/gsi/style
(accounts.google.com)
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
1 KiB
0 ms
/ccm/collect?en=…
(www.google.com)
0 KiB
0 ms
Optanon
consent-provider
153 KiB
0 ms
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
109 KiB
0 ms
27 KiB
0 ms
8 KiB
0 ms
…assets/otCommonStyles.css
(cdn.cookielaw.org)
5 KiB
0 ms
3 KiB
0 ms
…geo/location
(geolocation.onetrust.com)
0 KiB
0 ms
Pinterest
social
30 KiB
0 ms
23 KiB
0 ms
/ct/core.js
(s.pinimg.com)
2 KiB
0 ms
/v3/?event=…
(ct.pinterest.com)
1 KiB
0 ms
/user/?tid=…
(ct.pinterest.com)
1 KiB
0 ms
/user/?event=…
(ct.pinterest.com)
1 KiB
0 ms
/ct.html
(ct.pinterest.com)
1 KiB
0 ms
/v3/?tid=…
(ct.pinterest.com)
1 KiB
0 ms
Google Analytics
analytics
25 KiB
0 ms
/analytics.js
(www.google-analytics.com)
21 KiB
0 ms
…ua/ec.js
(www.google-analytics.com)
2 KiB
0 ms
/j/collect?v=…
(www.google-analytics.com)
1 KiB
0 ms
/g/collect?v=…
(analytics.google.com)
1 KiB
0 ms
Bing Ads
ad
21 KiB
0 ms
/bat.js
(bat.bing.com)
15 KiB
0 ms
/action/0?ti=…
(bat.bing.com)
1 KiB
0 ms
/action/0?ti=…
(bat.bing.com)
1 KiB
0 ms
/action/0?ti=…
(bat.bing.com)
1 KiB
0 ms
/action/0?ti=…
(bat.bing.com)
1 KiB
0 ms
/action/0?ti=…
(bat.bing.com)
1 KiB
0 ms
/action/0?ti=…
(bat.bing.com)
1 KiB
0 ms
…action/15005356.js
(bat.bing.com)
1 KiB
0 ms
/actionp/0?ti=…
(bat.bing.com)
0 KiB
0 ms
/actionp/0?ti=…
(bat.bing.com)
0 KiB
0 ms
Yahoo! JAPAN Ads
ad
11 KiB
0 ms
…cv/ytag.js
(s.yimg.jp)
11 KiB
0 ms
google.com
2 KiB
0 ms
/about/enterprise/
(marketingplatform.google.com)
2 KiB
0 ms
RTB House AdPilot
ad
1 KiB
0 ms
/tags?type=…
(creativecdn.com)
1 KiB
0 ms
/tags?type=…
(creativecdn.com)
0 KiB
0 ms
Reduce JavaScript execution time 4.5 s
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.TBT
URL
Total CPU Time
Script Evaluation
Script Parse
Booking.com
content
4,138 ms
3,011 ms
40 ms
…js/client.cd422f95.js
(cf.bstatic.com)
3,464 ms
2,372 ms
23 ms
214 ms
202 ms
5 ms
115 ms
111 ms
0 ms
112 ms
108 ms
3 ms
103 ms
88 ms
9 ms
71 ms
71 ms
0 ms
60 ms
60 ms
0 ms
booking.com
1st party
1,352 ms
55 ms
20 ms
1,352 ms
55 ms
20 ms
Google Tag Manager
tag-manager
849 ms
784 ms
45 ms
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
249 ms
231 ms
9 ms
/gtag/js?id=…
(www.googletagmanager.com)
155 ms
147 ms
6 ms
/gtag/destination?id=…
(www.googletagmanager.com)
92 ms
84 ms
6 ms
/gtag/destination?id=…
(www.googletagmanager.com)
79 ms
73 ms
5 ms
/gtag/destination?id=…
(www.googletagmanager.com)
74 ms
68 ms
4 ms
68 ms
64 ms
4 ms
/gtag/destination?id=…
(www.googletagmanager.com)
66 ms
61 ms
4 ms
/gtag/destination?id=…
(www.googletagmanager.com)
65 ms
57 ms
7 ms
Unattributable
664 ms
184 ms
0 ms
Unattributable
664 ms
184 ms
0 ms
awswaf.com
329 ms
290 ms
18 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
329 ms
290 ms
18 ms
Google/Doubleclick Ads
ad
124 ms
88 ms
8 ms
…m202…/pubads_impl.js?cb=31090462
(securepubads.g.doubleclick.net)
124 ms
88 ms
8 ms
Largest Contentful Paint element 2,360 ms
This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint elementLCP
Element
Find deals for any season
<span data-testid="herobanner-title1" class="f49c3e3e97 fb4fcd9c72 b940d0c9d3">
Phase
% of LCP
Timing
TTFB
9%
220 ms
Load Delay
0%
0 ms
Load Time
0%
0 ms
Render Delay
91%
2,140 ms
Avoid multiple page redirects Potential savings of 220 ms
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.LCPFCP
URL
Time Spent
booking.com
1st party
220 ms
220 ms
0 ms
Reduce unused JavaScript Potential savings of 2,032 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.LCPFCP
URL
Transfer Size
Potential Savings
Booking.com
content
1,739.2 KiB
1,252.3 KiB
200.5 KiB
188.8 KiB
…js/client.cd422f95.js
(cf.bstatic.com)
276.2 KiB
123.9 KiB
140.4 KiB
108.7 KiB
110.7 KiB
101.2 KiB
61.5 KiB
59.3 KiB
64.5 KiB
56.0 KiB
52.4 KiB
52.2 KiB
52.4 KiB
52.2 KiB
72.9 KiB
49.1 KiB
47.2 KiB
46.9 KiB
51.2 KiB
46.8 KiB
49.2 KiB
39.3 KiB
45.1 KiB
36.8 KiB
114.3 KiB
34.3 KiB
74.2 KiB
33.4 KiB
32.6 KiB
30.3 KiB
40.5 KiB
27.6 KiB
52.7 KiB
26.7 KiB
36.4 KiB
26.3 KiB
31.4 KiB
25.4 KiB
48.7 KiB
23.1 KiB
22.5 KiB
22.0 KiB
21.6 KiB
21.1 KiB
40.1 KiB
21.0 KiB
Google Tag Manager
tag-manager
833.6 KiB
368.7 KiB
/gtag/js?id=…
(www.googletagmanager.com)
125.4 KiB
50.3 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
93.9 KiB
49.1 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
96.9 KiB
48.8 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
96.8 KiB
48.7 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
104.6 KiB
48.2 KiB
92.7 KiB
43.6 KiB
/gtag/destination?id=…
(www.googletagmanager.com)
87.8 KiB
42.8 KiB
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
135.6 KiB
37.2 KiB
awswaf.com
363.8 KiB
190.4 KiB
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
363.8 KiB
190.4 KiB
Google/Doubleclick Ads
ad
160.2 KiB
87.0 KiB
…m202…/pubads_impl.js?cb=31090462
(securepubads.g.doubleclick.net)
160.2 KiB
87.0 KiB
Optanon
consent-provider
108.2 KiB
70.8 KiB
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
108.2 KiB
70.8 KiB
Other Google APIs/SDKs
utility
84.9 KiB
62.9 KiB
/gsi/client
(accounts.google.com)
84.9 KiB
62.9 KiB
Properly size images Potential savings of 418 KiB
Serve images that are appropriately-sized to save cellular data and improve load time. Learn how to size images.LCPFCP
URL
Resource Size
Potential Savings
Booking.com
content
598.1 KiB
418.0 KiB
6 best ryokans in Japan to rejuvenate yourself
<img class="bui-card__image" src="https://cf.bstatic.com/xdata/images/xphoto/720x405/292260574.webp?k=efc8e3…" alt="6 best ryokans in Japan to rejuvenate yourself">
100.9 KiB
79.1 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/619763.jpg?k=3bfc62a779df…" alt="" role="presentation" loading="lazy">
77.0 KiB
56.9 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/976919.jpg?k=b4d2dd3f8734…" alt="" role="presentation" loading="lazy">
88.5 KiB
52.6 KiB
7 best places in Asia to celebrate Christmas
<img class="bui-card__image" src="https://cf.bstatic.com/xdata/images/xphoto/540x405/290483794.webp?k=916f7b…" alt="7 best places in Asia to celebrate Christmas">
71.5 KiB
50.8 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/977409.jpg?k=82c14f9e6cea…" alt="" role="presentation" loading="lazy">
84.8 KiB
50.5 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/977437.jpg?k=0e8e510a113c…" alt="" role="presentation" loading="lazy">
63.9 KiB
47.2 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/976884.jpg?k=00a3546794e9…" alt="" role="presentation" loading="lazy">
57.2 KiB
42.2 KiB
6 magical Christmas experiences in London
<img class="bui-card__image" src="https://cf.bstatic.com/xdata/images/xphoto/540x405/289320924.webp?k=99a00f…" alt="6 magical Christmas experiences in London">
30.1 KiB
21.4 KiB
Top 5 places for winter sports in South Korea
<img class="bui-card__image" src="https://cf.bstatic.com/xdata/images/xphoto/540x405/288594543.webp?k=7a96a2…" alt="Top 5 places for winter sports in South Korea">
24.2 KiB
17.2 KiB
Reduce unused CSS Potential savings of 186 KiB
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.LCPFCP
URL
Transfer Size
Potential Savings
Booking.com
content
196.6 KiB
186.0 KiB
59.5 KiB
54.7 KiB
46.6 KiB
46.0 KiB
32.0 KiB
27.0 KiB
26.6 KiB
26.6 KiB
20.2 KiB
20.1 KiB
11.7 KiB
11.7 KiB
Avoid an excessive DOM size 4,193 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows. Learn how to avoid an excessive DOM size.TBT
Statistic
Element
Value
Total DOM Elements
4,193
Maximum DOM Depth
span.eedba9e88a > span.fcd9eec8fb > svg > path
<path d="m12.541 21.325-9.588-10a4.923 4.923 0 1 1 6.95-6.976l1.567 1.566a.75.75 0 …">
25
Maximum Child Elements
body#b2indexPage
<body data-bui-theme="traveller_ex-light" id="b2indexPage" class="bookings2 b2 index en lang_is_ltr header_reshuffle no_bg_img nobg user_cen…">
205
Serve images in next-gen formats Potential savings of 132 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. Learn more about modern image formats.LCPFCP
URL
Resource Size
Potential Savings
Booking.com
content
432.4 KiB
131.8 KiB
60.9 KiB
40.5 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/976919.jpg?k=b4d2dd3f8734…" alt="" role="presentation" loading="lazy">
88.5 KiB
21.3 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/977409.jpg?k=82c14f9e6cea…" alt="" role="presentation" loading="lazy">
84.8 KiB
19.6 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/619763.jpg?k=3bfc62a779df…" alt="" role="presentation" loading="lazy">
77.0 KiB
19.3 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/977437.jpg?k=0e8e510a113c…" alt="" role="presentation" loading="lazy">
63.9 KiB
16.0 KiB
div.aea002392a > div.f8e5e86e33 > picture.e5a3812a75 > img.e3fa9175ee
<img class="e3fa9175ee d354f8f44f" src="https://cf.bstatic.com/xdata/images/city/600x600/976884.jpg?k=00a3546794e9…" alt="" role="presentation" loading="lazy">
57.2 KiB
15.1 KiB
Serve static assets with an efficient cache policy 79 resources found
A long cache lifetime can speed up repeat visits to your page. Learn more about efficient cache policies.
URL
Cache TTL
Transfer Size
Booking.com
content
2,057 KiB
None
42 KiB
None
40 KiB
None
40 KiB
None
19 KiB
…images-flags/Gb@3x.png
(t-cf.bstatic.com)
None
1 KiB
30d
141 KiB
30d
101 KiB
30d
91 KiB
30d
89 KiB
30d
85 KiB
30d
77 KiB
30d
77 KiB
30d
72 KiB
30d
66 KiB
30d
65 KiB
30d
64 KiB
30d
62 KiB
30d
61 KiB
30d
60 KiB
30d
58 KiB
30d
52 KiB
30d
49 KiB
30d
47 KiB
30d
41 KiB
30d
36 KiB
30d
33 KiB
30d
32 KiB
30d
31 KiB
30d
27 KiB
30d
25 KiB
30d
23 KiB
30d
21 KiB
30d
20 KiB
30d
20 KiB
30d
19 KiB
30d
18 KiB
30d
17 KiB
30d
16 KiB
30d
16 KiB
30d
16 KiB
30d
13 KiB
30d
13 KiB
30d
13 KiB
30d
12 KiB
30d
12 KiB
30d
11 KiB
30d
10 KiB
30d
10 KiB
30d
10 KiB
30d
9 KiB
30d
9 KiB
30d
8 KiB
30d
8 KiB
30d
8 KiB
30d
7 KiB
30d
6 KiB
30d
5 KiB
30d
3 KiB
30d
3 KiB
30d
3 KiB
30d
2 KiB
…print/0cc4ce4….css
(cf.bstatic.com)
30d
2 KiB
30d
2 KiB
30d
2 KiB
30d
1 KiB
Optanon
consent-provider
118 KiB
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
1d
109 KiB
1d
8 KiB
Pinterest
social
26 KiB
/ct/core.js
(s.pinimg.com)
2h
2 KiB
14d
23 KiB
Google Analytics
analytics
23 KiB
…ua/ec.js
(www.google-analytics.com)
1h
2 KiB
/analytics.js
(www.google-analytics.com)
2h
21 KiB
Yahoo! JAPAN Ads
ad
11 KiB
…cv/ytag.js
(s.yimg.jp)
10m
11 KiB
Google Tag Manager
tag-manager
3 KiB
/a?id=…
(www.googletagmanager.com)
None
1 KiB
/a?id=…
(www.googletagmanager.com)
None
1 KiB
/a?id=…
(www.googletagmanager.com)
None
1 KiB
/a?id=…
(www.googletagmanager.com)
None
1 KiB
/a?id=…
(www.googletagmanager.com)
None
1 KiB
/a?id=…
(www.googletagmanager.com)
None
1 KiB
booking.com
1st party
1 KiB
None
1 KiB
Ensure text remains visible during webfont load
Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading. Learn more about font-display.
URL
Potential Savings
Booking.com
content
50 ms
10 ms
10 ms
30 ms
Eliminate render-blocking resources Potential savings of 0 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn how to eliminate render-blocking resources.LCPFCP
URL
Transfer Size
Potential Savings
Booking.com
content
32.8 KiB
80 ms
32.8 KiB
80 ms
Defer offscreen images Potential savings of 24 KiB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive. Learn how to defer offscreen images.LCPFCP
URL
Resource Size
Potential Savings
Booking.com
content
24.2 KiB
24.2 KiB
Top 5 places for winter sports in South Korea
<img class="bui-card__image" src="https://cf.bstatic.com/xdata/images/xphoto/540x405/288594543.webp?k=7a96a2…" alt="Top 5 places for winter sports in South Korea">
24.2 KiB
24.2 KiB
Avoid serving legacy JavaScript to modern browsers Potential savings of 24 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn how to use modern JavaScriptLCPFCP
URL
Potential Savings
Booking.com
content
17.3 KiB
9.2 KiB
Object.getPrototypeOf
Date.prototype.toJSON
Object.entries
Array.prototype.find
@babel/plugin-transform-classes
8.1 KiB
Object.values
…js/client.cd422f95.js
(cf.bstatic.com)
0.0 KiB
@babel/plugin-transform-classes
Optanon
consent-provider
6.9 KiB
…202403.2.0/otBannerSdk.js
(cdn.cookielaw.org)
6.9 KiB
Array.prototype.fill
Avoid enormous network payloads Total size was 6,374 KiB
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
URL
Transfer Size
Booking.com
content
846.2 KiB
…js/client.cd422f95.js
(cf.bstatic.com)
277.0 KiB
201.3 KiB
141.3 KiB
115.0 KiB
111.5 KiB
awswaf.com
364.4 KiB
…a18a4859af9c/challenge.js
(d8c14d4960ca.47a814e6.us-east-2.token.awswaf.com)
364.4 KiB
Google Tag Manager
tag-manager
263.2 KiB
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
136.7 KiB
/gtag/js?id=…
(www.googletagmanager.com)
126.5 KiB
booking.com
1st party
169.9 KiB
169.9 KiB
Google/Doubleclick Ads
ad
161.0 KiB
…m202…/pubads_impl.js?cb=31090462
(securepubads.g.doubleclick.net)
161.0 KiB
Avoid long main-thread tasks 20 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay. Learn how to avoid long main-thread tasksTBT
URL
Start Time
Duration
Booking.com
content
1,899 ms
…js/client.cd422f95.js
(cf.bstatic.com)
6,539 ms
621 ms
6,337 ms
202 ms
…js/client.cd422f95.js
(cf.bstatic.com)
3,855 ms
115 ms
…js/client.cd422f95.js
(cf.bstatic.com)
3,732 ms
114 ms
7,804 ms
112 ms
…js/client.cd422f95.js
(cf.bstatic.com)
3,616 ms
108 ms
…js/client.cd422f95.js
(cf.bstatic.com)
4,275 ms
106 ms
…js/client.cd422f95.js
(cf.bstatic.com)
4,397 ms
94 ms
…js/client.cd422f95.js
(cf.bstatic.com)
6,137 ms
90 ms
…js/client.cd422f95.js
(cf.bstatic.com)
4,180 ms
89 ms
…js/client.cd422f95.js
(cf.bstatic.com)
3,507 ms
85 ms
…js/client.cd422f95.js
(cf.bstatic.com)
4,074 ms
84 ms
…js/client.cd422f95.js
(cf.bstatic.com)
4,980 ms
79 ms
Google Tag Manager
tag-manager
528 ms
/gtag/js?id=…
(www.googletagmanager.com)
5,525 ms
151 ms
/gtm.js?id=GTM-5Q664QZ
(www.googletagmanager.com)
4,787 ms
138 ms
/gtag/destination?id=…
(www.googletagmanager.com)
7,295 ms
90 ms
/gtag/destination?id=…
(www.googletagmanager.com)
7,385 ms
77 ms
/gtag/destination?id=…
(www.googletagmanager.com)
7,223 ms
72 ms
awswaf.com
173 ms
…a18a4859af9c/challenge.js
(d8c14d4960ca.edge.sdk.awswaf.com)
4,584 ms
173 ms
Google/Doubleclick Ads
ad
101 ms
…m202…/pubads_impl.js?cb=31090462
(securepubads.g.doubleclick.net)
1,563 ms
101 ms
Initial server response time was short Root document took 430 ms
Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.LCPFCP
URL
Time Spent
booking.com
1st party
430 ms
430 ms
User Timing marks and measures 13 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences. Learn more about User Timing marks.
Name
Type
Start Time
Duration
b-stylesheets
Measure
0.00 ms
1,212.50 ms
b-pre-scripts
Measure
0.00 ms
1,474.60 ms
b-post-scripts
Measure
0.00 ms
1,628.20 ms
TARGETING_PARAMETERS_LATENCY
Measure
3,797.95 ms
624.62 ms
TARGETING_PARAMETERS_LATENCY
Measure
3,797.95 ms
629.15 ms
REMOTE_TARGETING_REQUESTED
Mark
3,628.06 ms
AD_COMPONENT_CREATED
Mark
3,628.94 ms
REMOTE_TARGETING_REQUESTED
Mark
3,797.95 ms
AD_COMPONENT_CREATED
Mark
3,798.13 ms
REMOTE_TARGETING_SUCCESS
Mark
4,422.57 ms
REMOTE_TARGETING_SUCCESS
Mark
4,427.10 ms
AD_SLOT_REQUESTED
Mark
4,531.86 ms
AD_SLOT_REQUESTED
Mark
4,535.47 ms
Avoid non-composited animations 6 animated elements found
Animations which are not composited can be janky and increase CLS. Learn how to avoid non-composited animationsCLS
Element
Name
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
::after
<::after>
Unsupported CSS Property: left
c019ddacb5
Avoid chaining critical requests 40 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. Learn how to avoid chaining critical requests.
Maximum critical path latency: 1,254.733 ms
Initial Navigation
- 52.297 ms, 32.76 KiB
- 17.26 ms, 1.74 KiB
- 18.927 ms, 2.63 KiB
- 17.659 ms, 1.46 KiB
- 22.05 ms, 1.44 KiB
- 16.932 ms, 0.82 KiB
- 41.146 ms, 0.96 KiB
- 17.746 ms, 2.17 KiB
- 21.162 ms, 0.86 KiB
- 22.399 ms, 2.09 KiB
- 22.726 ms, 2.40 KiB
- 21.702 ms, 2.80 KiB
- 39.019 ms, 2.86 KiB
- 23.836 ms, 1.36 KiB
- 20.88 ms, 1.38 KiB
- 22.353 ms, 1.75 KiB
- 26.238 ms, 2.39 KiB
- 39.422 ms, 2.84 KiB
- 29.826 ms, 1.29 KiB
- 31.367 ms, 2.49 KiB
- 39.528 ms, 2.85 KiB
- 29.982 ms, 1.16 KiB
- 38.927 ms, 3.03 KiB
- 40.294 ms, 3.13 KiB
- 41.887 ms, 1.13 KiB
- 43.124 ms, 1.13 KiB
- 40.735 ms, 1.14 KiB
- 42.012 ms, 1.04 KiB
- 41.71 ms, 1.23 KiB
- 42.942 ms, 0.99 KiB
- 43.968 ms, 4.61 KiB
- 48.621 ms, 1.48 KiB
- 48.566 ms, 1.63 KiB
- 49.007 ms, 4.44 KiB
- 48.635 ms, 1.24 KiB
- 19.823 ms, 1.97 KiB
- 19.893 ms, 3.05 KiB
- 19.403 ms, 2.62 KiB
- 20.29 ms, 23.26 KiB
- 16.676 ms, 4.69 KiB
More information about the performance of your application. These numbers don't directly affect the Performance score.
Passed audits (14)
Show Hide
Minify CSS
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.LCPFCP
Minify JavaScript
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.LCPFCP
Efficiently encode images
Optimized images load faster and consume less cellular data. Learn how to efficiently encode images.LCPFCP
Enable text compression
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes. Learn more about text compression.LCPFCP
Preconnect to required origins
Consider adding preconnect or dns-prefetch resource hints to establish early connections to important third-party origins. Learn how to preconnect to required origins.LCPFCP
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. Consider using MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save network bytes. Learn more about efficient video formatsLCPFCP
Remove duplicate modules in JavaScript bundles
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity. LCPFCP
Preload Largest Contentful Paint image
If the LCP element is dynamically added to the page, you should preload the image in order to improve LCP. Learn more about preloading LCP elements.LCP
Lazy load third-party resources with facades
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade.TBT
Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint. Learn more about optimal lazy loading.LCP
Uses passive listeners to improve scrolling performance
Consider marking your touch and wheel event listeners as passive to improve your page's scroll performance. Learn more about adopting passive event listeners.
Avoids document.write()
For users on slow connections, external scripts dynamically injected via document.write() can delay page load by tens of seconds. Learn how to avoid document.write().
Image elements have explicit width and height
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensionsCLS
Has a <meta name="viewport"> tag with width or initial-scale
A <meta name="viewport"> not only optimizes your app for mobile screen sizes, but also prevents a 300 millisecond delay to user input. Learn more about using the viewport meta tag.
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.
ARIA
[aria-*] attributes do not match their roles
Each ARIA role supports a specific subset of aria-* attributes. Mismatching these invalidates the aria-* attributes. Learn how to match ARIA attributes to their roles.
Failing Elements
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
Save this item to a trip list
<div aria-expanded="false">
[aria-*] attributes do not have valid values
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.
Failing Elements
USD
<button aria-controls="header_currency_picker" data-testid="header-currency-picker-trigger" aria-label="Prices in United States Dollar" type="button" class="a83ed08757 c21c56c305 f38b6daa18 f671049264 fd3248769f">
Language: English (UK)
<button aria-controls="header_language_picker" data-testid="header-language-picker-trigger" aria-label="Language: English (UK)" type="button" class="a83ed08757 c21c56c305 f38b6daa18 f671049264 fd3248769f">
Romance
<button id="ROMANCE-tab-trigger" data-testid="webcore-filter-carousel-tab-trigger" role="tab" aria-current="page" aria-selected="true" aria-controls="ROMANCE" tabindex="0" type="button" class="a83ed08757 f3441ccb97 ec66406250">
ARIA progressbar elements do not have accessible names.
When a progressbar element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to label progressbar elements.
Failing Elements
div > div.df1462f7a4 > div.c251698e74 > div.a9883fe675
<div class="a9883fe675" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="0">
Uses ARIA roles on incompatible elements
Many HTML elements can only be assigned certain ARIA roles. Using ARIA roles where they are not allowed can interfere with the accessibility of the web page. Learn more about ARIA roles.
Failing Elements
Check-in date — Check-out date 2 adults · 0 children · 1 room Search I’m lookin…
<form class="" action="https://www.booking.com/searchresults.en-gb.html" method="GET" role="region" aria-label="Search properties">
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Additional items to manually check (10)
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Interactive controls are keyboard focusable
Custom interactive controls are keyboard focusable and display a focus indicator. Learn how to make custom controls focusable.
Interactive elements indicate their purpose and state
Interactive elements, such as links and buttons, should indicate their state and be distinguishable from non-interactive elements. Learn how to decorate interactive elements with affordance hints.
The page has a logical tab order
Tabbing through the page follows the visual layout. Users cannot focus elements that are offscreen. Learn more about logical tab ordering.
Visual order on the page follows DOM order
DOM order matches the visual order, improving navigation for assistive technology. Learn more about DOM and visual ordering.
User focus is not accidentally trapped in a region
A user can tab into and out of any control or region without accidentally trapping their focus. Learn how to avoid focus traps.
The user's focus is directed to new content added to the page
If new content, such as a dialog, is added to the page, the user's focus is directed to it. Learn how to direct focus to new content.
HTML5 landmark elements are used to improve navigation
Landmark elements (<main>, <nav>, etc.) are used to improve the keyboard navigation of the page for assistive technology. Learn more about landmark elements.
Offscreen content is hidden from assistive technology
Offscreen content is hidden with display: none or aria-hidden=true. Learn how to properly hide offscreen content.
Custom controls have associated labels
Custom interactive controls have associated labels, provided by aria-label or aria-labelledby. Learn more about custom controls and labels.
Custom controls have ARIA roles
Custom interactive controls have appropriate ARIA roles. Learn how to add roles to custom controls.
These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Passed audits (26)
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[aria-hidden="true"] is not present on the document <body>
Assistive technologies, like screen readers, work inconsistently when aria-hidden="true" is set on the document <body>. Learn how aria-hidden affects the document body.
[role]s have all required [aria-*] attributes
Some ARIA roles have required attributes that describe the state of the element to screen readers. Learn more about roles and required attributes.
Elements with an ARIA [role] that require children to contain a specific [role] have all required children.
Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.
[role]s are contained by their required parent element
Some ARIA child roles must be contained by specific parent roles to properly perform their intended accessibility functions. Learn more about ARIA roles and required parent element.
[aria-*] attributes are valid and not misspelled
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid names. Learn more about valid ARIA attributes.
Buttons have an accessible name
When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.
Image elements have [alt] attributes
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the alt attribute.
[user-scalable="no"] is not used in the <meta name="viewport"> element and the [maximum-scale] attribute is not less than 5.
Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.
ARIA attributes are used as specified for the element's role
Some ARIA attributes are only allowed on an element under certain conditions. Learn more about conditional ARIA attributes.
[aria-hidden="true"] elements do not contain focusable descendents
Focusable descendents within an [aria-hidden="true"] element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how aria-hidden affects focusable elements.
Elements use only permitted ARIA attributes
Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.
[role] values are valid
ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.
Background and foreground colors have a sufficient contrast ratio
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Document has a <title> element
The title gives screen reader users an overview of the page, and search engine users rely on it heavily to determine if a page is relevant to their search. Learn more about document titles.
<html> element has a [lang] attribute
If a page doesn't specify a lang attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the lang attribute.
<html> element has a valid value for its [lang] attribute
Specifying a valid BCP 47 language helps screen readers announce text properly. Learn how to use the lang attribute.
Form elements have associated labels
Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.
Lists contain only <li> elements and script supporting elements (<script> and <template>).
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
List items (<li>) are contained within <ul>, <ol> or <menu> parent elements
Screen readers require list items (<li>) to be contained within a parent <ul>, <ol> or <menu> to be announced properly. Learn more about proper list structure.
No element has a [tabindex] value greater than 0
A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the tabindex attribute.
Touch targets have sufficient size and spacing.
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.
Heading elements appear in a sequentially-descending order
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.
Deprecated ARIA roles were not used
Deprecated ARIA roles may not be processed correctly by assistive technology. Learn more about deprecated ARIA roles.
Image elements do not have [alt] attributes that are redundant text.
Informative elements should aim for short, descriptive alternative text. Alternative text that is exactly the same as the text adjacent to the link or image is potentially confusing for screen reader users, because the text will be read twice. Learn more about the alt attribute.
Not applicable (27)
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[accesskey] values are unique
Access keys let users quickly focus a part of the page. For proper navigation, each access key must be unique. Learn more about access keys.
button, link, and menuitem elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to make command elements more accessible.
Elements with role="dialog" or role="alertdialog" have accessible names.
ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.
ARIA input fields have accessible names
When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.
ARIA meter elements have accessible names
When a meter element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to name meter elements.
Elements with the role=text attribute do not have focusable descendents.
Adding role=text around a text node split by markup enables VoiceOver to treat it as one phrase, but the element's focusable descendents will not be announced. Learn more about the role=text attribute.
ARIA toggle fields have accessible names
When a toggle field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about toggle fields.
ARIA tooltip elements have accessible names
When a tooltip element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to name tooltip elements.
ARIA treeitem elements have accessible names
When a treeitem element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about labeling treeitem elements.
The page contains a heading, skip link, or landmark region
Adding ways to bypass repetitive content lets keyboard users navigate the page more efficiently. Learn more about bypass blocks.
<dl>'s contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
When definition lists are not properly marked up, screen readers may produce confusing or inaccurate output. Learn how to structure definition lists correctly.
Definition list items are wrapped in <dl> elements
Definition list items (<dt> and <dd>) must be wrapped in a parent <dl> element to ensure that screen readers can properly announce them. Learn how to structure definition lists correctly.
ARIA IDs are unique
The value of an ARIA ID must be unique to prevent other instances from being overlooked by assistive technologies. Learn how to fix duplicate ARIA IDs.
No form fields have multiple labels
Form fields with multiple labels can be confusingly announced by assistive technologies like screen readers which use either the first, the last, or all of the labels. Learn how to use form labels.
<frame> or <iframe> elements have a title
Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.
<html> element has an [xml:lang] attribute with the same base language as the [lang] attribute.
If the webpage does not specify a consistent language, then the screen reader might not announce the page's text correctly. Learn more about the lang attribute.
Input buttons have discernible text.
Adding discernable and accessible text to input buttons may help screen reader users understand the purpose of the input button. Learn more about input buttons.
<input type="image"> elements have [alt] text
When an image is being used as an <input> button, providing alternative text can help screen reader users understand the purpose of the button. Learn about input image alt text.
The document does not use <meta http-equiv="refresh">
Users do not expect a page to refresh automatically, and doing so will move focus back to the top of the page. This may create a frustrating or confusing experience. Learn more about the refresh meta tag.
<object> elements have alternate text
Screen readers cannot translate non-text content. Adding alternate text to <object> elements helps screen readers convey meaning to users. Learn more about alt text for object elements.
Select elements have associated label elements.
Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the select element.
Tables have different content in the summary attribute and <caption>.
The summary attribute should describe the table structure, while <caption> should have the onscreen title. Accurate table mark-up helps users of screen readers. Learn more about summary and caption.
Cells in a <table> element that use the [headers] attribute refer to table cells within the same table.
Screen readers have features to make navigating tables easier. Ensuring <td> cells using the [headers] attribute only refer to other cells in the same table may improve the experience for screen reader users. Learn more about the headers attribute.
<th> elements and elements with [role="columnheader"/"rowheader"] have data cells they describe.
Screen readers have features to make navigating tables easier. Ensuring table headers always refer to some set of cells may improve the experience for screen reader users. Learn more about table headers.
[lang] attributes have a valid value
Specifying a valid BCP 47 language on elements helps ensure that text is pronounced correctly by a screen reader. Learn how to use the lang attribute.
<video> elements contain a <track> element with [kind="captions"]
When a video provides a caption it is easier for deaf and hearing impaired users to access its information. Learn more about video captions.
General
Browser errors were logged to the console
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
Source
Description
Other Google APIs/SDKs
utility
/gsi/client:71:488
(accounts.google.com)
[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.
booking.com
1st party
The fetch of the config file resulted in a network error: ERR_NAME_NOT_RESOLVED
The provider's FedCM config file fetch resulted in an error response code.
Detected JavaScript libraries
All front-end JavaScript libraries detected on the page. Learn more about this JavaScript library detection diagnostic audit.
Name
Version
jQuery
1.11.3
Lo-Dash
4.17.21
Trust and Safety
Ensure CSP is effective against XSS attacks
A strong Content Security Policy (CSP) significantly reduces the risk of cross-site scripting (XSS) attacks. Learn how to use a CSP to prevent XSS
Description
Directive
Severity
No CSP found in enforcement mode
High
Passed audits (13)
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Uses HTTPS
All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.
Avoids deprecated APIs
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Avoids third-party cookies
Chrome is moving towards a new experience that allows users to choose to browse without third-party cookies. Learn more about third-party cookies.
Allows users to paste into input fields
Preventing input pasting is a bad practice for the UX, and weakens security by blocking password managers.Learn more about user-friendly input fields.
Avoids requesting the geolocation permission on page load
Users are mistrustful of or confused by sites that request their location without context. Consider tying the request to a user action instead. Learn more about the geolocation permission.
Avoids requesting the notification permission on page load
Users are mistrustful of or confused by sites that request to send notifications without context. Consider tying the request to user gestures instead. Learn more about responsibly getting permission for notifications.
Displays images with correct aspect ratio
Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.
Serves images with appropriate resolution
Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.
Has a <meta name="viewport"> tag with width or initial-scale
A <meta name="viewport"> not only optimizes your app for mobile screen sizes, but also prevents a 300 millisecond delay to user input. Learn more about using the viewport meta tag.
Page has the HTML doctype
Specifying a doctype prevents the browser from switching to quirks-mode. Learn more about the doctype declaration.
Properly defines charset
A character encoding declaration is required. It can be done with a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header. Learn more about declaring the character encoding.
No issues in the Issues panel in Chrome Devtools
Issues logged to the Issues panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Page has valid source maps
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.
URL
Map URL
Booking.com
content
TypeError: Failed to fetch
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…js/client.cd422f95.js
(cf.bstatic.com)
…js/client.cd422f95.js.map
(istatic.booking.com)
TypeError: Failed to fetch
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Google/Doubleclick Ads
ad
/bg/bHuCxueCF….js
(pagead2.googlesyndication.com)
Not applicable (2)
Show Hide
Redirects HTTP traffic to HTTPS
Make sure that you redirect all HTTP traffic to HTTPS in order to enable secure web features for all your users. Learn more.
Document uses legible font sizes
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px. Learn more about legible font sizes.
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.
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Additional items to manually check (1)
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Structured data is valid
Run these additional validators on your site to check additional SEO best practices.
Passed audits (9)
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Page isn’t blocked from indexing
Search engines are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.
Document has a <title> element
The title gives screen reader users an overview of the page, and search engine users rely on it heavily to determine if a page is relevant to their search. Learn more about document titles.
Document has a meta description
Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.
Page has successful HTTP status code
Pages with unsuccessful HTTP status codes may not be indexed properly. Learn more about HTTP status codes.
Links are crawlable
Search engines may use href attributes on links to crawl websites. Ensure that the href attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable
robots.txt is valid
If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.
Image elements have [alt] attributes
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the alt attribute.
Document has a valid hreflang
hreflang links tell search engines what version of a page they should list in search results for a given language or region. Learn more about hreflang.
Document has a valid rel=canonical
Canonical links suggest which URL to show in search results. Learn more about canonical links.