There were issues affecting this run of Lighthouse:
- The page may not be loading as expected because your test URL (https://www.booking.com/) was redirected to https://www.booking.com/index.en-gb.html?label=gen173nr-1BCAEoggI46AdIM1gEaJUCiAECmAEJuAEJyAER2AEB6AEBiAIBqAIDuALPz8i9BsACAdICJDU0ZmRiOWQ1LTA0MDAtNDc3Yy05YWY4LWJjOWViYzVhM2MyN9gCBeACAQ&sid=bbe2f1da7169a1a2b29939e59c8a28df&keep_landing=1&sb_price_type=total&. Try testing the second URL directly.
Values are estimated and may vary. The performance score is calculated directly from these metrics.See calculator.
0–49 50–89 90–100
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 12.2.3Unthrottled CPU/Memory Power: 450 CPU throttling: 1.2x slowdown (Simulated) Screen emulation: 412x823, DPR 1.75 Axe version: 4.10.2
- Single page sessionThis data is taken from a single page session, as opposed to field data summarizing many sessions.
- Initial page load
- Slow 4G throttlingNetwork throttling: 150 ms TCP RTT, 1,638.4 kb/s throughput (Simulated) Browser location: North America
- Using HeadlessChromium 133.0.6943.53 with lrUser 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"
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 |
…mobile/cross-sell_loader.js?ic=91110277 (cf.bstatic.com) | 1 KiB | 85 ms |
…js/node_modu….231b029b.js (cf.bstatic.com) | 2 KiB | 36 ms |
…js/2e2b58a0.9c64bf87.chunk.js (cf.bstatic.com) | 41 KiB | 29 ms |
…js/4a89d2db.92ae2ee0.chunk.js (cf.bstatic.com) | 2 KiB | 13 ms |
…core-deps-inlinedet_cloudfront_sd/97754f5….js (cf.bstatic.com) | 30 KiB | 6 ms |
…core_cloudfront_sd/9420186….js (cf.bstatic.com) | 158 KiB | 1 ms |
…customer/cookie-banner.min.js (cf.bstatic.com) | 5 KiB | 1 ms |
…js/remoteEntry.9d1c2e5b.client.js (cf.bstatic.com) | 9 KiB | 0 ms |
…js/remoteEntry.073a8498.client.js (cf.bstatic.com) | 7 KiB | 0 ms |
…js/remoteEntry.3961dfd5.client.js (cf.bstatic.com) | 8 KiB | 0 ms |
…js/remoteEntry.6917f40a.client.js (cf.bstatic.com) | 7 KiB | 0 ms |
…js/remoteEntry.db477c45.client.js (cf.bstatic.com) | 7 KiB | 0 ms |
…js/remoteEntry.11b850c0.client.js (cf.bstatic.com) | 8 KiB | 0 ms |
…js/remoteEntry.2d8a7d3e.client.js (cf.bstatic.com) | 8 KiB | 0 ms |
…js/remoteEntry.b87cd2fb.client.js (cf.bstatic.com) | 7 KiB | 0 ms |
…js/remoteEntry.f739b58b.client.js (cf.bstatic.com) | 8 KiB | 0 ms |
…js/782ad794.c0d867ee.chunk.js (cf.bstatic.com) | 201 KiB | 0 ms |
…max1024x768/154….webp?k=847c6d1…&o= (cf.bstatic.com) | 163 KiB | 0 ms |
…max1024x768/283….webp?k=b861d0f…&o= (cf.bstatic.com) | 143 KiB | 0 ms |
…js/22e5ddc2.df620328.chunk.js (cf.bstatic.com) | 142 KiB | 0 ms |
…max1024x768/187….webp?k=0abbcd2…&o= (cf.bstatic.com) | 140 KiB | 0 ms |
…max1024x768/280….webp?k=d5b9f77…&o= (cf.bstatic.com) | 137 KiB | 0 ms |
…max1024x768/611….webp?k=4db7bea…&o= (cf.bstatic.com) | 132 KiB | 0 ms |
…490x871/330….webp?k=6da89f4…&o= (cf.bstatic.com) | 114 KiB | 0 ms |
…490x871/330….webp?k=12ed20c…&o= (cf.bstatic.com) | 93 KiB | 0 ms |
…mobile/en-gb_cross-sell.ceb5c40.js (xx.bstatic.com) | 93 KiB | 0 ms |
…490x871/330….webp?k=f524b73…&o= (cf.bstatic.com) | 87 KiB | 0 ms |
…490x871/330….webp?k=0410769…&o= (cf.bstatic.com) | 85 KiB | 0 ms |
…490x871/330….webp?k=291f842…&o= (cf.bstatic.com) | 85 KiB | 0 ms |
…max1024x768/132….webp?k=f9cd304…&o= (cf.bstatic.com) | 84 KiB | 0 ms |
…js/dc32f6b7.755a0500.chunk.js (cf.bstatic.com) | 75 KiB | 0 ms |
…js/ddf740c7.cdd2d3be.chunk.js (cf.bstatic.com) | 74 KiB | 0 ms |
…max1024x768/126….webp?k=46a8a94…&o= (cf.bstatic.com) | 70 KiB | 0 ms |
…max1024x768/178….webp?k=6c9cfca…&o= (cf.bstatic.com) | 68 KiB | 0 ms |
…490x871/329….webp?k=c59fc24…&o= (cf.bstatic.com) | 65 KiB | 0 ms |
…490x871/330….webp?k=772ce28…&o= (cf.bstatic.com) | 64 KiB | 0 ms |
…js/5b1239aa.c5aa61a9.chunk.js (cf.bstatic.com) | 62 KiB | 0 ms |
…media/bh_aw_cpg_main_image.b4347622.png (cf.bstatic.com) | 62 KiB | 0 ms |
…js/d9560671.6fcd0586.chunk.js (cf.bstatic.com) | 53 KiB | 0 ms |
…core_cloudfront_sd.iq_ltr/99fc054….css (cf.bstatic.com) | 53 KiB | 0 ms |
…js/81da5f32.c9a1118a.chunk.js (cf.bstatic.com) | 50 KiB | 0 ms |
…js/f624ebdb.ef67c435.chunk.js (cf.bstatic.com) | 49 KiB | 0 ms |
…490x871/330….webp?k=33eb4ee…&o= (cf.bstatic.com) | 48 KiB | 0 ms |
…js/282e5b08.4ce11061.chunk.js (cf.bstatic.com) | 48 KiB | 0 ms |
…js/ef191925.22a9a9d0.chunk.js (cf.bstatic.com) | 45 KiB | 0 ms |
…illustrat…/GeniusGen…@2x.png (t-cf.bstatic.com) | 45 KiB | 0 ms |
…fonts-brand/BookingBold.woff (t-cf.bstatic.com) | 42 KiB | 0 ms |
…490x871/330….webp?k=cda71e8…&o= (cf.bstatic.com) | 41 KiB | 0 ms |
…js/5aeeadf2.30f8c390.chunk.js (cf.bstatic.com) | 41 KiB | 0 ms |
…lp_cloudfront_sd/3de90f6….js (cf.bstatic.com) | 39 KiB | 0 ms |
…searchresults_no_filters_cloudfront_sd.iq_ltr/3cf4158….css (cf.bstatic.com) | 39 KiB | 0 ms |
…searchresults_cloudfront_sd/ff4645a….js (cf.bstatic.com) | 38 KiB | 0 ms |
…mobile/cross-sell.ffa6e2e.css (xx.bstatic.com) | 37 KiB | 0 ms |
…js/b4bfc4cb.b5abfb13.chunk.js (cf.bstatic.com) | 36 KiB | 0 ms |
…js/5638344d.c3cbae57.chunk.js (cf.bstatic.com) | 33 KiB | 0 ms |
…css/client.732293fa.css (cf.bstatic.com) | 33 KiB | 0 ms |
…js/7e8161ba.19a6aa6f.chunk.js (cf.bstatic.com) | 33 KiB | 0 ms |
…js/b9a82cb8.b6cb4432.chunk.js (cf.bstatic.com) | 32 KiB | 0 ms |
…490x871/330….webp?k=6c2cb21…&o= (cf.bstatic.com) | 31 KiB | 0 ms |
…js/b37e9879.41776dea.chunk.js (cf.bstatic.com) | 23 KiB | 0 ms |
…js/8067d7e4.33f6bb11.chunk.js (cf.bstatic.com) | 22 KiB | 0 ms |
…js/18cad957.7be507a1.chunk.js (cf.bstatic.com) | 22 KiB | 0 ms |
…app_cloudfront_sd/8292575….js (cf.bstatic.com) | 21 KiB | 0 ms |
…300x240/140….jpg?k=5a6b195…&o= (cf.bstatic.com) | 21 KiB | 0 ms |
…300x240/140….jpg?k=39782c8…&o= (cf.bstatic.com) | 20 KiB | 0 ms |
…300x240/140….jpg?k=9933865…&o= (cf.bstatic.com) | 20 KiB | 0 ms |
…js/95a17449.b83d3688.chunk.js (cf.bstatic.com) | 19 KiB | 0 ms |
…illustrations-traveller/TripsGlobe.png (t-cf.bstatic.com) | 19 KiB | 0 ms |
…300x240/140….jpg?k=6894b31…&o= (cf.bstatic.com) | 19 KiB | 0 ms |
…300x240/140….jpg?k=ad02b17…&o= (cf.bstatic.com) | 19 KiB | 0 ms |
…263x210/976877.jpg?k=2aab282…&o= (q-xx.bstatic.com) | 18 KiB | 0 ms |
…263x210/977409.jpg?k=82c14f9…&o= (q-xx.bstatic.com) | 17 KiB | 0 ms |
…300x240/140….jpg?k=12ea3fa…&o= (cf.bstatic.com) | 17 KiB | 0 ms |
…300x240/140….jpg?k=4c8a96e…&o= (cf.bstatic.com) | 17 KiB | 0 ms |
…263x210/977388.jpg?k=4c9c542…&o= (q-xx.bstatic.com) | 17 KiB | 0 ms |
…300x300/420….jpeg?k=08ce7a4…&o= (q-xx.bstatic.com) | 17 KiB | 0 ms |
…300x240/140….jpg?k=1496051…&o= (cf.bstatic.com) | 17 KiB | 0 ms |
…300x240/140….jpg?k=4084189…&o= (cf.bstatic.com) | 16 KiB | 0 ms |
…300x240/140….jpg?k=f77225b…&o= (cf.bstatic.com) | 16 KiB | 0 ms |
…263x210/976919.jpg?k=b4d2dd3…&o= (r-xx.bstatic.com) | 16 KiB | 0 ms |
…263x210/976708.jpg?k=cb62481…&o= (q-xx.bstatic.com) | 15 KiB | 0 ms |
…300x240/140….jpg?k=1fa8b77…&o= (cf.bstatic.com) | 14 KiB | 0 ms |
…square240/420….jpg?k=d6c406a…&o= (cf.bstatic.com) | 13 KiB | 0 ms |
…square240/194….jpg?k=df2ea6b…&o= (cf.bstatic.com) | 13 KiB | 0 ms |
…263x210/977381.jpg?k=ab236c5…&o= (q-xx.bstatic.com) | 13 KiB | 0 ms |
…263x210/977437.jpg?k=0e8e510…&o= (r-xx.bstatic.com) | 13 KiB | 0 ms |
…square240/344….jpg?k=4411dba…&o= (cf.bstatic.com) | 13 KiB | 0 ms |
…js/09fb2abd.65a9febf.chunk.js (cf.bstatic.com) | 12 KiB | 0 ms |
…js/0a098284.e848f476.chunk.js (cf.bstatic.com) | 12 KiB | 0 ms |
…263x210/976884.jpg?k=00a3546…&o= (r-xx.bstatic.com) | 12 KiB | 0 ms |
…illustrations-traveller/FreeCancellation.png (t-cf.bstatic.com) | 11 KiB | 0 ms |
…js/27bbaa9c.8b72ff1e.chunk.js (cf.bstatic.com) | 11 KiB | 0 ms |
…square240/294….jpg?k=be8e44b…&o= (cf.bstatic.com) | 11 KiB | 0 ms |
…square240/54502322.jpg?k=49cb9cc…&o= (cf.bstatic.com) | 10 KiB | 0 ms |
…square240/245….jpg?k=a1ef20b…&o= (cf.bstatic.com) | 10 KiB | 0 ms |
…js/ebf8c3e3.fe641b24.chunk.js (cf.bstatic.com) | 9 KiB | 0 ms |
…263x210/977423.jpg?k=0193baf…&o= (r-xx.bstatic.com) | 9 KiB | 0 ms |
…js/remoteEntry.cd1959a3.client.js (cf.bstatic.com) | 9 KiB | 0 ms |
…square240/527….jpg?k=38e9e86…&o= (cf.bstatic.com) | 9 KiB | 0 ms |
…263x210/689617.jpg?k=edf8899…&o= (r-xx.bstatic.com) | 9 KiB | 0 ms |
…square240/341….jpg?k=416e572…&o= (cf.bstatic.com) | 8 KiB | 0 ms |
…js/index_cloudfront_sd.js (cf.bstatic.com) | 8 KiB | 0 ms |
…js/97a643cd.9c1e7d4b.chunk.js (cf.bstatic.com) | 8 KiB | 0 ms |
…js/remoteEntry.edd37f33.client.js (cf.bstatic.com) | 8 KiB | 0 ms |
…core_critical_cloudfront_sd.iq_ltr/7a035c8….css (cf.bstatic.com) | 7 KiB | 0 ms |
…js/remoteEntry.beedbe6a.client.js (cf.bstatic.com) | 7 KiB | 0 ms |
…index_cloudfront_sd.iq_ltr/e5aeecc….css (cf.bstatic.com) | 7 KiB | 0 ms |
…js/31e40d2f.121fcc22.chunk.js (cf.bstatic.com) | 6 KiB | 0 ms |
…app_cloudfront_sd.iq_ltr/6ede3d5….css (cf.bstatic.com) | 6 KiB | 0 ms |
…booking-app-logo-128/8c0a29a….png (cf.bstatic.com) | 6 KiB | 0 ms |
…css/22e5ddc2.5d849b9d.chunk.css (cf.bstatic.com) | 5 KiB | 0 ms |
…300x240/140….jpg?k=4b99c21…&o= (cf.bstatic.com) | 5 KiB | 0 ms |
…iphone_app_icon/6a9bd9c….png (cf.bstatic.com) | 5 KiB | 0 ms |
…css/ddf740c7.79134fd2.chunk.css (cf.bstatic.com) | 4 KiB | 0 ms |
…et_cloudfront_sd/a5c838d….js (cf.bstatic.com) | 4 KiB | 0 ms |
…illustrations-traveller/CustomerSupport.png (t-cf.bstatic.com) | 4 KiB | 0 ms |
…index_sync_cloudfront_sd/ecc4502….js (cf.bstatic.com) | 4 KiB | 0 ms |
…js/36086793.a456df3d.chunk.js (cf.bstatic.com) | 4 KiB | 0 ms |
…css/5aeeadf2.4c678ae6.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…css/dc32f6b7.b551d478.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…css/81da5f32.2823ca4c.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…error_catcher_bec_cloudfront_sd/c40c556….js (cf.bstatic.com) | 3 KiB | 0 ms |
…css/5b1239aa.14273f12.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…css/b9a82cb8.8d31da0e.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…css/f624ebdb.b2ef7e74.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…css/282e5b08.1b7e4e45.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…css/5638344d.fcc5cfb6.chunk.css (cf.bstatic.com) | 3 KiB | 0 ms |
…iq_m_type_overrides_cloudfront_sd.iq_ltr/cf628f3….css (cf.bstatic.com) | 3 KiB | 0 ms |
…lazy_load_images_cloudfront_sd/c823613….js (cf.bstatic.com) | 3 KiB | 0 ms |
…css/d9560671.eaed1c71.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…loader_db/2ba7cff….gif (cf.bstatic.com) | 2 KiB | 0 ms |
…js/ce4afa91.ed717715.chunk.js (cf.bstatic.com) | 2 KiB | 0 ms |
…genius_vip_cloudfront_sd/aae9754….js (cf.bstatic.com) | 2 KiB | 0 ms |
…js/f41dcaf5.cbd24a1b.chunk.js (cf.bstatic.com) | 2 KiB | 0 ms |
…css/b37e9879.a10f482f.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…css/ef191925.100c8bd2.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…css/b4bfc4cb.8d4e3d87.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…index_async_cloudfront_sd/ae57c29….js (cf.bstatic.com) | 2 KiB | 0 ms |
…css/97a643cd.b8649497.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…css/7e8161ba.5c9046bb.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…css/2e2b58a0.4b5741f8.chunk.css (cf.bstatic.com) | 2 KiB | 0 ms |
…css/27bbaa9c.efefaf03.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/782ad794.d732ad79.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…images-flags/Gb@3x.png (t-cf.bstatic.com) | 1 KiB | 0 ms |
…js/node_modu….67aa5d77.js (cf.bstatic.com) | 1 KiB | 0 ms |
…css/95a17449.672af8eb.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…js/node_modu….6473a23f.js (cf.bstatic.com) | 1 KiB | 0 ms |
…js/63bff8e9.92d79f49.chunk.js (cf.bstatic.com) | 1 KiB | 0 ms |
…css/ce4afa91.d37fa6d1.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/31e40d2f.af9e4e05.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/ebf8c3e3.5b77f502.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/09fb2abd.d5c0a0f8.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/18cad957.59e15d61.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/8067d7e4.59e15d61.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/f41dcaf5.4a08a303.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…css/63bff8e9.2c75ca3d.chunk.css (cf.bstatic.com) | 1 KiB | 0 ms |
…crossorigin_check_cloudfront_sd/2454015….js (cf.bstatic.com) | 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 |
/gtag/js?id=G-A12345&l=dataLayer&cx=c>m=45He52d0v79615461za200 (www.googletagmanager.com) | 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 |
…5230/sw_iframe.html?origin=https%3A%2F%2Fwww.booking.com (www.googletagmanager.com) | 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 | |
…106…/value=1.00&guid=ON&script=0&label=undefined (googleads.g.doubleclick.net) | 1 KiB | 0 ms |
…activity/src=4228414;type=views;cat=views;ord=126…;npa=1;u1=-1… (ade.googlesyndication.com) | 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 |
/pagead/sodar?id=sodar2&v=232&li=gpt_m202…&jk=727…&rc= (pagead2.googlesyndication.com) | 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 |
/getconfig/sodar?sv=200&tid=gpt&tv=m202…&st=env (ep1.adtrafficquality.google) | 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 |
…0191998d-4ea0-7a35-bbae-232aa21682f6/en-gb.json (cdn.cookielaw.org) | 27 KiB | 0 ms |
/scripttemplates/otSDKStub.js (cdn.cookielaw.org) | 8 KiB | 0 ms |
…assets/otCommonStyles.css (cdn.cookielaw.org) | 5 KiB | 0 ms |
…3ea94870-d4b1-483a-b1d2-faf1d982bb31/3ea94870-d4b1-483a-b….json (cdn.cookielaw.org) | 3 KiB | 0 ms |
…geo/location (geolocation.onetrust.com) | 0 KiB | 0 ms |
Pinterest social | 30 KiB | 0 ms |
…lib/main.8821a9da.js (s.pinimg.com) | 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 |
/v1/publisher:getClientId?key=AIzaSyA65… (ampcid.google.com) | 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 |
…mobile/cross-sell_loader.js?ic=91110277 (cf.bstatic.com) | 156 ms | 144 ms | 0 ms |
…mobile/en-gb_cross-sell.ceb5c40.js (xx.bstatic.com) | 93 ms | 51 ms | 6 ms |
…core_cloudfront_sd/9420186….js (cf.bstatic.com) | 88 ms | 74 ms | 11 ms |
…js/node_modu….231b029b.js (cf.bstatic.com) | 87 ms | 86 ms | 0 ms |
…js/2e2b58a0.9c64bf87.chunk.js (cf.bstatic.com) | 79 ms | 75 ms | 4 ms |
…js/4a89d2db.92ae2ee0.chunk.js (cf.bstatic.com) | 63 ms | 63 ms | 0 ms |
booking.com 1st party | 986 ms | 79 ms | 22 ms |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 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 |
/gtag/js?id=G-A12345&l=dataLayer&cx=c>m=45He52d0v79615461za200 (www.googletagmanager.com) | 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 |
…customer/cookie-banner.min.js (cf.bstatic.com) | 4.7 KiB | 150 ms |
…css/client.732293fa.css (cf.bstatic.com) | 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 | |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 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 |
…js/782ad794.c0d867ee.chunk.js (cf.bstatic.com) | 200.5 KiB | 188.9 KiB |
…core_cloudfront_sd/9420186….js (cf.bstatic.com) | 156.9 KiB | 122.6 KiB |
…js/client.cd422f95.js (cf.bstatic.com) | 276.2 KiB | 121.3 KiB |
…js/d9560671.6fcd0586.chunk.js (cf.bstatic.com) | 52.7 KiB | 52.3 KiB |
…js/ddf740c7.cdd2d3be.chunk.js (cf.bstatic.com) | 72.9 KiB | 49.1 KiB |
…js/22e5ddc2.df620328.chunk.js (cf.bstatic.com) | 141.2 KiB | 47.0 KiB |
…js/282e5b08.4ce11061.chunk.js (cf.bstatic.com) | 47.2 KiB | 46.9 KiB |
…mobile/en-gb_cross-sell.ceb5c40.js (xx.bstatic.com) | 91.9 KiB | 45.5 KiB |
…js/81da5f32.c9a1118a.chunk.js (cf.bstatic.com) | 49.2 KiB | 43.5 KiB |
…js/ef191925.22a9a9d0.chunk.js (cf.bstatic.com) | 44.5 KiB | 37.1 KiB |
…js/dc32f6b7.755a0500.chunk.js (cf.bstatic.com) | 74.2 KiB | 35.4 KiB |
…js/5b1239aa.c5aa61a9.chunk.js (cf.bstatic.com) | 61.5 KiB | 32.3 KiB |
…js/5638344d.c3cbae57.chunk.js (cf.bstatic.com) | 32.6 KiB | 30.2 KiB |
…js/2e2b58a0.9c64bf87.chunk.js (cf.bstatic.com) | 40.5 KiB | 27.6 KiB |
…lp_cloudfront_sd/3de90f6….js (cf.bstatic.com) | 38.6 KiB | 27.0 KiB |
…js/b4bfc4cb.b5abfb13.chunk.js (cf.bstatic.com) | 35.4 KiB | 26.9 KiB |
…js/b9a82cb8.b6cb4432.chunk.js (cf.bstatic.com) | 31.4 KiB | 25.4 KiB |
…js/f624ebdb.ef67c435.chunk.js (cf.bstatic.com) | 48.7 KiB | 24.0 KiB |
…js/18cad957.7be507a1.chunk.js (cf.bstatic.com) | 21.6 KiB | 21.1 KiB |
…js/5aeeadf2.30f8c390.chunk.js (cf.bstatic.com) | 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 |
/gtag/js?id=G-A12345&l=dataLayer&cx=c>m=45He52d0v79615461za200 (www.googletagmanager.com) | 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 |
…core_cloudfront_sd.iq_ltr/99fc054….css (cf.bstatic.com) | 51.9 KiB | 49.4 KiB |
…mobile/cross-sell.ffa6e2e.css (xx.bstatic.com) | 36.2 KiB | 34.3 KiB |
…css/client.732293fa.css (cf.bstatic.com) | 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
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"> | …media/bh_aw_cpg_main_image.b4347622.png (cf.bstatic.com) |
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"> | …media/bh_aw_cpg_main_image.b4347622.png (cf.bstatic.com) | 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"> | …illustrat…/GeniusGen…@2x.png (t-cf.bstatic.com) | 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.
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 |
…fonts-brand/BookingBold.woff (t-cf.bstatic.com) | 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"> | …max1024x768/154….webp?k=847c6d1…&o= (cf.bstatic.com) | 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"> | …max1024x768/283….webp?k=b861d0f…&o= (cf.bstatic.com) | 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"> | …max1024x768/187….webp?k=0abbcd2…&o= (cf.bstatic.com) | 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"> | …max1024x768/280….webp?k=d5b9f77…&o= (cf.bstatic.com) | 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"> | …max1024x768/611….webp?k=4db7bea…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=6da89f4…&o= (cf.bstatic.com) | 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"> | …max1024x768/132….webp?k=f9cd304…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=12ed20c…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=f524b73…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=0410769…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=291f842…&o= (cf.bstatic.com) | 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"> | …max1024x768/126….webp?k=46a8a94…&o= (cf.bstatic.com) | 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"> | …max1024x768/178….webp?k=6c9cfca…&o= (cf.bstatic.com) | 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"> | …490x871/329….webp?k=c59fc24…&o= (cf.bstatic.com) | 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"> | …media/bh_aw_cpg_main_image.b4347622.png (cf.bstatic.com) | 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"> | …490x871/330….webp?k=772ce28…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=33eb4ee…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=cda71e8…&o= (cf.bstatic.com) | 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"> | …490x871/330….webp?k=6c2cb21…&o= (cf.bstatic.com) | 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"> | …booking-app-logo-128/8c0a29a….png (cf.bstatic.com) | 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 | |
…core_cloudfront_sd/9420186….js (cf.bstatic.com) | 8.7 KiB | |
…core_cloudfront_sd/9420186….js:9:57534 (cf.bstatic.com) | @babel/plugin-transform-classes | |
…core_cloudfront_sd/9420186….js:43:279368 (cf.bstatic.com) | Object.entries | |
…core_cloudfront_sd/9420186….js:43:279637 (cf.bstatic.com) | Array.prototype.find | |
…js/b37e9879.41776dea.chunk.js (cf.bstatic.com) | 0.0 KiB | |
…js/b37e9879.41776dea.chunk.js:2:67426 (cf.bstatic.com) | @babel/plugin-transform-classes | |
…js/client.cd422f95.js (cf.bstatic.com) | 0.0 KiB | |
…js/client.cd422f95.js:2:710884 (cf.bstatic.com) | @babel/plugin-transform-classes | |
Optanon consent-provider | 6.9 KiB | |
…202403.2.0/otBannerSdk.js (cdn.cookielaw.org) | 6.9 KiB | |
…202403.2.0/otBannerSdk.js:7:7371 (cdn.cookielaw.org) | 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 |
…js/782ad794.c0d867ee.chunk.js (cf.bstatic.com) | 201.3 KiB |
…max1024x768/154….webp?k=847c6d1…&o= (cf.bstatic.com) | 163.4 KiB |
…core_cloudfront_sd/9420186….js (cf.bstatic.com) | 157.8 KiB |
…max1024x768/283….webp?k=b861d0f…&o= (cf.bstatic.com) | 142.9 KiB |
…js/22e5ddc2.df620328.chunk.js (cf.bstatic.com) | 142.0 KiB |
…max1024x768/187….webp?k=0abbcd2…&o= (cf.bstatic.com) | 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 |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 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 |
…mobile/cross-sell_loader.js?ic=91110277 (cf.bstatic.com) | 17,416 ms | 144 ms |
…js/client.cd422f95.js (cf.bstatic.com) | 15,517 ms | 133 ms |
…js/node_modu….231b029b.js (cf.bstatic.com) | 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 |
…js/2e2b58a0.9c64bf87.chunk.js (cf.bstatic.com) | 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 | |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 1,284 ms | 116 ms |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 1,400 ms | 93 ms |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 1,008 ms | 92 ms |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 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 |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k (www.booking.com) | 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
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k
(www.booking.com)
…customer/cookie-banner.min.js
- 15.468 ms, 4.69 KiB (cf.bstatic.com)
…css/client.732293fa.css
(cf.bstatic.com)
…fonts-brand/BookingBold.woff
- 12.958 ms, 41.74 KiB (t-cf.bstatic.com)
…css/5b1239aa.14273f12.chunk.css
- 15.201 ms, 2.86 KiB (cf.bstatic.com)
…css/95a17449.672af8eb.chunk.css
- 15.728 ms, 1.38 KiB (cf.bstatic.com)
…css/ce4afa91.d37fa6d1.chunk.css
- 15.292 ms, 1.29 KiB (cf.bstatic.com)
…css/81da5f32.2823ca4c.chunk.css
- 16.235 ms, 3.03 KiB (cf.bstatic.com)
…css/dc32f6b7.b551d478.chunk.css
- 15.709 ms, 3.13 KiB (cf.bstatic.com)
…css/22e5ddc2.5d849b9d.chunk.css
- 16.869 ms, 5.41 KiB (cf.bstatic.com)
…genius_vip_cloudfront_sd/aae9754….js
- 14.65 ms, 1.97 KiB (cf.bstatic.com)
Passed audits (14) Show Hide
Passed audits (14)
Show Hide
Minify CSS
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()
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
<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
[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
[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:"> |
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"> |
Additional items to manually check (10) Show Hide
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.
Passed audits (26) Show Hide
Passed audits (26)
Show Hide
[aria-hidden="true"] is not present on the document <body>
[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
[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.
[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
[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
[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
[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.
[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
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
[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
[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
<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
<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
<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.
Links have a discernible name
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Lists contain only <li> elements and script supporting elements (<script> and <template>).
<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
<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
[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.
[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
Not applicable (27)
Show Hide
[accesskey] values are unique
[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.
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
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
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.
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
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
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.
<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
<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
<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.
<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
<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. Links are distinguishable without relying on color.
Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.
The document does not use <meta http-equiv="refresh">
<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
<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. Skip links are focusable.
Including a skip link can help users skip to the main content to save time. Learn more about skip links.
Tables have different content in the summary attribute and <caption>.
<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.
<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.
<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
[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"]
<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 | …core_cloudfront_sd/9420186….js:43:26308 (cf.bstatic.com) |
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 | |
…core_cloudfront_sd/9420186….js:43:56955 (cf.bstatic.com) | 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 | |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k:1:0 (www.booking.com) | Refused to execute script from 'https://pagead2.googlesyndication.com/pagead/conversion/988382855/?random=1739728851128&cv=11&fst=1739728851128&bg=ffffff&guid=ON&async=1>m=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. |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k:1:0 (www.booking.com) | The fetch of the config file resulted in a network error: ERR_NAME_NOT_RESOLVED |
/index.en-gb.html?label=gen173nr-…&sid=bbe2f1d…&k:1:0 (www.booking.com) | 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) Show Hide
Passed audits (13)
Show Hide
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
<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 | |||
…css/client.732293fa.css:29:3977 (cf.bstatic.com) | .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 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.
Not applicable (1) Show Hide
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) Show Hide
Additional items to manually check (1)
Show Hide
Structured data is valid
Run the Structured Data Testing Tool and the Structured Data Linter to validate structured data. Learn more about Structured Data.
Passed audits (10) Show Hide
Passed audits (10)
Show Hide
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
<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 have descriptive text
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
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
[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 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
rel=canonical Canonical links suggest which URL to show in search results. Learn more about canonical links.
