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Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. Overall scoring color key: (0-49 50-89 90-100).

For scripted tests, Lighthouse report will only be available on the final step.

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Performance 58

Lighthouse Metrics

Values are estimated and may vary.

The performance score is calculated directly from these metrics. See calculator.

First Contentful Paint Speed Index Largest Contentful Paint Time to Interactive Total Blocking Time Cumulative Layout Shift
0.7s 3.4s 1.3s 6.4s 3,580ms 0

Aiming to improve? check out our Opportunities & Experiments for suggestions and run No-Code Experiments to see how changes impact this site!

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Opportunities (9)

  1. Avoid multiple page redirects

    Estimated savings 0.29 s

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

    URL Time Spent (ms)
    https://chirurgievasculaire.lu/ 291
    https://chirurgievasculaire.lu/en 0

  2. Serve images in next-gen formats

    Estimated savings 0.22 s

    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.

    URL Resource Size (bytes) Potential Savings (bytes)
    https://chirurgievasculaire.lu/media/pages/home/e5da02effa-1663324863/op-1200x940.jpg 348426 202292
    https://chirurgievasculaire.lu/media/pages/home/67e1f217b0-1663324863/empfang-1400x940.jpg 319555 193628
    https://chirurgievasculaire.lu/media/pages/home/2d3456e2b6-1663324863/kirchberg-1400x940.jpg 263683 144770
    https://chirurgievasculaire.lu/media/pages/home/180f235d1f-1663345905/doctors-1400x940.jpg 213985 119455
    https://chirurgievasculaire.lu/media/pages/home/331ce565cf-1663324863/ultraschall-1200x940.jpg 176677 113110
    https://chirurgievasculaire.lu/media/pages/home/b6adb9919a-1663345859/doctors-fun-1200x940.jpg 173201 107198
    https://chirurgievasculaire.lu/media/pages/home/4ece711780-1663519496/uni-ins-1408x-220x.png 47843 42594
    https://chirurgievasculaire.lu/media/pages/home/dd8c7cad04-1663516413/college-medical-1408x-220x.png 39613 35164
    https://chirurgievasculaire.lu/media/pages/home/466f1b0ff0-1663517685/european-union-of-medical-specialists-1408x-220x.png 28953 23979
    https://chirurgievasculaire.lu/media/pages/dirk-grotemeyer/3783517d84-1663324861/dirk-grotemeyer-448x448.jpg 34776 21257
    https://chirurgievasculaire.lu/media/pages/susanne-honig/2c156aecc9-1663346145/susanne-honig-448x448.jpg 36410 20264
    https://chirurgievasculaire.lu/media/pages/home/c16bda6fc3-1681811079/slcv-220x.png 23162 20025
    https://chirurgievasculaire.lu/media/pages/daniel-manzoni/a2db1cc1c8-1663324861/daniel-manzoni-448x448.jpg 31167 19288
    https://chirurgievasculaire.lu/media/pages/home/863aab90ab-1663516313/incci-1408x-220x.png 19217 15526
    https://chirurgievasculaire.lu/media/pages/home/242c9d5e27-1663517799/berufsverbandes-der-phlebologen-ev-1408x-220x.png 17927 15279
    https://chirurgievasculaire.lu/media/pages/home/bb2bf345ae-1733221312/deutsche-gesellschaft-2024-220x.png 18131 14515
    https://chirurgievasculaire.lu/media/pages/home/7768d99e8f-1663517614/logo-esvs-1408x-220x.png 16537 13838

  3. Defer offscreen images

    View Experiment!

    Estimated savings 0.17 s

    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.

    URL Resource Size (bytes) Potential Savings (bytes)
    https://chirurgievasculaire.lu/media/pages/home/e5da02effa-1663324863/op-1200x940.jpg 348426 348426
    https://chirurgievasculaire.lu/media/pages/home/67e1f217b0-1663324863/empfang-1400x940.jpg 319555 319555
    https://chirurgievasculaire.lu/media/pages/home/2d3456e2b6-1663324863/kirchberg-1400x940.jpg 263683 235011
    https://chirurgievasculaire.lu/media/pages/home/331ce565cf-1663324863/ultraschall-1200x940.jpg 176677 176677
    https://chirurgievasculaire.lu/media/pages/home/b6adb9919a-1663345859/doctors-fun-1200x940.jpg 173201 173201
    https://chirurgievasculaire.lu/media/pages/home/a07ce57118-1663519437/aerzte-saarland.svg 49975 49975
    https://chirurgievasculaire.lu/media/pages/home/4ece711780-1663519496/uni-ins-1408x-220x.png 47843 47843
    https://chirurgievasculaire.lu/media/pages/home/9cb252f0ff-1663519343/uni-heidel.svg 46244 46244
    https://chirurgievasculaire.lu/media/pages/home/dd8c7cad04-1663516413/college-medical-1408x-220x.png 39613 39613
    https://chirurgievasculaire.lu/media/pages/susanne-honig/2c156aecc9-1663346145/susanne-honig-448x448.jpg 36410 36410
    https://chirurgievasculaire.lu/media/pages/dirk-grotemeyer/3783517d84-1663324861/dirk-grotemeyer-448x448.jpg 34776 34776
    https://chirurgievasculaire.lu/media/pages/daniel-manzoni/a2db1cc1c8-1663324861/daniel-manzoni-448x448.jpg 31167 31167
    https://chirurgievasculaire.lu/media/pages/home/466f1b0ff0-1663517685/european-union-of-medical-specialists-1408x-220x.png 28953 28953
    https://chirurgievasculaire.lu/media/pages/home/c16bda6fc3-1681811079/slcv-220x.png 23162 23162
    https://chirurgievasculaire.lu/media/pages/home/863aab90ab-1663516313/incci-1408x-220x.png 19217 19217
    https://chirurgievasculaire.lu/media/pages/home/bb2bf345ae-1733221312/deutsche-gesellschaft-2024-220x.png 18131 18131
    https://chirurgievasculaire.lu/media/pages/home/242c9d5e27-1663517799/berufsverbandes-der-phlebologen-ev-1408x-220x.png 17927 17927
    https://chirurgievasculaire.lu/media/pages/home/7768d99e8f-1663517614/logo-esvs-1408x-220x.png 16537 16537
    https://chirurgievasculaire.lu/media/pages/home/caff9e450e-1663519543/uni-lux.svg 2868 2868
    https://chirurgievasculaire.lu/media/pages/home/a79f7e5a7f-1663516259/hopitaux.svg 2830 2830

  4. Reduce unused JavaScript

    Estimated savings 0.13 s

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

    URL Transfer Size (bytes) Potential Savings (bytes)
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 362749 192917
    Source Source Bytes Source Wasted Bytes
    …./node_modules/mapbox-gl/dist/mapbox-gl.js 320282 168773
    …./node_modules/alpinejs/dist/module.esm.js 12795 5889
    …./node_modules/buffer/index.js 6447 5767
    …./node_modules/@alpinejs/focus/dist/module.esm.js 3885 3224
    …./node_modules/@glidejs/glide/dist/glide.esm.js 9225 2810

  5. Properly size images

    Estimated savings 0.09 s

    Serve images that are appropriately-sized to save cellular data and improve load time. Learn how to size images.

    URL Resource Size (bytes) Potential Savings (bytes)
    https://chirurgievasculaire.lu/media/pages/home/e5da02effa-1663324863/op-1200x940.jpg 348426 132382
    https://chirurgievasculaire.lu/media/pages/home/67e1f217b0-1663324863/empfang-1400x940.jpg 319555 105938
    https://chirurgievasculaire.lu/media/pages/home/180f235d1f-1663345905/doctors-1400x940.jpg 213985 70940
    https://chirurgievasculaire.lu/media/pages/home/331ce565cf-1663324863/ultraschall-1200x940.jpg 176677 67127
    https://chirurgievasculaire.lu/media/pages/home/b6adb9919a-1663345859/doctors-fun-1200x940.jpg 173201 65807
    https://chirurgievasculaire.lu/media/pages/home/2d3456e2b6-1663324863/kirchberg-1400x940.jpg 263683 46844
    https://chirurgievasculaire.lu/media/pages/home/4ece711780-1663519496/uni-ins-1408x-220x.png 47843 25602
    https://chirurgievasculaire.lu/media/pages/home/dd8c7cad04-1663516413/college-medical-1408x-220x.png 39613 25352
    https://chirurgievasculaire.lu/media/pages/home/466f1b0ff0-1663517685/european-union-of-medical-specialists-1408x-220x.png 28953 18530
    https://chirurgievasculaire.lu/media/pages/home/c16bda6fc3-1681811079/slcv-220x.png 23162 14824
    https://chirurgievasculaire.lu/media/pages/home/863aab90ab-1663516313/incci-1408x-220x.png 19217 12299
    https://chirurgievasculaire.lu/media/pages/home/bb2bf345ae-1733221312/deutsche-gesellschaft-2024-220x.png 18131 11604
    https://chirurgievasculaire.lu/media/pages/home/242c9d5e27-1663517799/berufsverbandes-der-phlebologen-ev-1408x-220x.png 17927 11473
    https://chirurgievasculaire.lu/media/pages/home/7768d99e8f-1663517614/logo-esvs-1408x-220x.png 16537 10584

  6. Initial server response time was short

    Estimated savings 0.07 s

    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.

    URL Time Spent (ms)
    https://chirurgievasculaire.lu/en 174

  7. Eliminate render-blocking resources

    View Experiment!

    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.

    URL Transfer Size (bytes) Potential Savings (ms)
    https://chirurgievasculaire.lu/css/main.css?id=4a8dc42a272d397d0b75b95da1514513 18096 193

  8. Avoid serving legacy JavaScript to modern browsers

    Potential savings of 0 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 JavaScript

    URL Potential Savings (bytes)
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 55
    Location Signal
    • URL: https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310
    • Line: 1
    • Column: 71782
    		 @babel/plugin-transform-classes

  9. Efficiently encode images

    Potential savings of 184 KiB

    Optimized images load faster and consume less cellular data. Learn how to efficiently encode images.

    URL Resource Size (bytes) Potential Savings (bytes)
    https://chirurgievasculaire.lu/media/pages/home/e5da02effa-1663324863/op-1200x940.jpg 348426 53688
    https://chirurgievasculaire.lu/media/pages/home/67e1f217b0-1663324863/empfang-1400x940.jpg 319555 53490
    https://chirurgievasculaire.lu/media/pages/home/331ce565cf-1663324863/ultraschall-1200x940.jpg 176677 28036
    https://chirurgievasculaire.lu/media/pages/home/b6adb9919a-1663345859/doctors-fun-1200x940.jpg 173201 20567
    https://chirurgievasculaire.lu/media/pages/home/180f235d1f-1663345905/doctors-1400x940.jpg 213985 12295
    https://chirurgievasculaire.lu/media/pages/home/2d3456e2b6-1663324863/kirchberg-1400x940.jpg 263683 8803
    https://chirurgievasculaire.lu/media/pages/dirk-grotemeyer/3783517d84-1663324861/dirk-grotemeyer-448x448.jpg 34776 6300
    https://chirurgievasculaire.lu/media/pages/daniel-manzoni/a2db1cc1c8-1663324861/daniel-manzoni-448x448.jpg 31167 5440

Diagnostics (13)

  1. Largest Contentful Paint element

    1,320 ms

    This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint element

  2. Minimize main-thread work

    5.0 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 work

    Category Time Spent
    Other 3461
    Script Evaluation 1012
    Style & Layout 375
    Rendering 61
    Garbage Collection 46
    Parse HTML & CSS 20
    Script Parsing & Compilation 19

  3. Avoid an excessive DOM size

    2,402 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.

    Statistic Element Value
    Total DOM Elements
    Maximum DOM Depth div > div > p > strong
    Maximum Child Elements div.md:pt-[26px] > a.block > span.hidden > svg#logo

  4. Page prevented back/forward cache restoration

    1 failure reason

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

    Failure reason Failure type
    Pages whose main resource has cache-control:no-store cannot enter back/forward cache. Not actionable
    Frame Url
    https://chirurgievasculaire.lu/en

  5. Avoid chaining critical requests

    3 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.

    1. https://chirurgievasculaire.lu/ 0kb
      1. https://chirurgievasculaire.lu/en 89kb
        1. https://chirurgievasculaire.lu/css/main.css?id=4a8dc42a272d397d0b75b95da1514513 18kb
          1. https://chirurgievasculaire.lu/fonts/WorkSans-Regular.woff2 58kb
          2. https://chirurgievasculaire.lu/fonts/WorkSans-Light.woff2 61kb
          3. https://chirurgievasculaire.lu/fonts/WorkSans-SemiBold.woff2 61kb

  6. Ensure text remains visible during webfont load

    View Experiment!

    Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading. Learn more about font-display.

    URL Potential Savings
    https://chirurgievasculaire.lu/fonts/WorkSans-Regular.woff2 1195
    https://chirurgievasculaire.lu/fonts/WorkSans-Light.woff2 904
    https://chirurgievasculaire.lu/fonts/WorkSans-SemiBold.woff2 952

  7. Avoid enormous network payloads

    View Experiment!

    Total size was 3,989 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 (bytes)
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 363097
    https://chirurgievasculaire.lu/media/pages/home/e5da02effa-1663324863/op-1200x940.jpg 349016
    https://chirurgievasculaire.lu/media/pages/home/67e1f217b0-1663324863/empfang-1400x940.jpg 320118
    https://chirurgievasculaire.lu/media/pages/home/2d3456e2b6-1663324863/kirchberg-1400x940.jpg 264183
    https://chirurgievasculaire.lu/media/pages/home/180f235d1f-1663345905/doctors-1400x940.jpg 214431
    https://chirurgievasculaire.lu/media/pages/home/331ce565cf-1663324863/ultraschall-1200x940.jpg 177078
    https://chirurgievasculaire.lu/media/pages/home/b6adb9919a-1663345859/doctors-fun-1200x940.jpg 173602
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/529/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 173169
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/530/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 152891
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/528/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 148191

  8. Avoid long main-thread tasks

    13 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 tasks

    URL Start Time Duration
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 3437 904
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 5144 537
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 1393 481
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 5686 403
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 4421 354
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 6090 313
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 4783 308
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 2184 285
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 913 204
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 1890 182
    https://chirurgievasculaire.lu/en 667 149
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 1119 59
    Unattributable 1337 51

  9. Minimize third-party usage

    Third-party code blocked the main thread for 0 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.

    Third-Party Transfer Size (bytes) Main-Thread Blocking Time
    Mapbox 1490172 0
    URL Transfer Size Blocking Time
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/529/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 173169 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/530/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 152891 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/528/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 148191 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/529/349.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 139416 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/528/349.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 135244 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/527/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 124540 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/531/349.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 122628 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/530/349.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 104513 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/531/348.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 97172 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/10/527/349.vector.pbf?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 70326 0
    https://api.mapbox.com/fonts/v1/mapbox/Montserrat%20Medium,Arial%20Unicode%20MS%20Regular/256-511.pbf?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 67337 0
    https://api.mapbox.com/fonts/v1/mapbox/Montserrat%20Medium,Arial%20Unicode%20MS%20Regular/0-255.pbf?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 47527 0
    https://api.mapbox.com/styles/v1/diverently/cl5m9qbbx000z15pr1p5ayd8i/bzsdzyypveequiic6zohzt1yv/sprite.png?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 45500 0
    https://api.mapbox.com/fonts/v1/mapbox/Montserrat%20Regular,Arial%20Unicode%20MS%20Regular/0-255.pbf?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 45063 0
    https://api.mapbox.com/styles/v1/diverently/cl5m9qbbx000z15pr1p5ayd8i?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 6197 0
    https://api.mapbox.com/v4/mapbox.mapbox-streets-v8.json?secure&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 5060 0
    https://api.mapbox.com/styles/v1/diverently/cl5m9qbbx000z15pr1p5ayd8i/bzsdzyypveequiic6zohzt1yv/sprite.json?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 5008 0
    https://api.mapbox.com/map-sessions/v1?sku=101EDJNkdvp7d&access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 239 0
    https://events.mapbox.com/events/v2?access_token=pk.eyJ1IjoiZGl2ZXJlbnRseSIsImEiOiJjazEyOXM0eDEwNzBuM2NtcWdyZHM2NmF0In0.75FqJ1oKeRTU7wq-nFmXUA 151 0
    Fathom Analytics 2753 0
    URL Transfer Size Blocking Time
    https://cdn.usefathom.com/script.js 2311 0
    https://cdn.usefathom.com/?h=https%3A%2F%2Fchirurgievasculaire.lu&p=%2Fen&r=&sid=EVFQQSEV&qs=%7B%7D&cid=1289355 442 0

  10. JavaScript execution time

    1.0 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.

    URL Total CPU Time Script Evaluation Script Parse
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 4077 850 16
    https://chirurgievasculaire.lu/en 532 70 3
    Unattributable 375 86 0

  11. Avoid large layout shifts

    4 elements found

    These DOM elements were most affected by layout shifts. Some layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

    Element Layout shift impact
    body.bg-white > header.fixed > div.relative 0
    nav.h-full > ul.hidden > li > a.block 0
    div.relative > nav.h-full > ul.hidden > li 0
    div.relative > nav.h-full > ul.hidden > li 0

  12. Serve static assets with an efficient cache policy

    28 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 (bytes)
    https://chirurgievasculaire.lu/media/pages/home/e5da02effa-1663324863/op-1200x940.jpg 2592000000 349016
    https://chirurgievasculaire.lu/media/pages/home/67e1f217b0-1663324863/empfang-1400x940.jpg 2592000000 320118
    https://chirurgievasculaire.lu/media/pages/home/2d3456e2b6-1663324863/kirchberg-1400x940.jpg 2592000000 264183
    https://chirurgievasculaire.lu/media/pages/home/180f235d1f-1663345905/doctors-1400x940.jpg 2592000000 214431
    https://chirurgievasculaire.lu/media/pages/home/331ce565cf-1663324863/ultraschall-1200x940.jpg 2592000000 177078
    https://chirurgievasculaire.lu/media/pages/home/b6adb9919a-1663345859/doctors-fun-1200x940.jpg 2592000000 173602
    https://chirurgievasculaire.lu/media/pages/home/a07ce57118-1663519437/aerzte-saarland.svg 2592000000 49975
    https://chirurgievasculaire.lu/media/pages/home/4ece711780-1663519496/uni-ins-1408x-220x.png 2592000000 48098
    https://chirurgievasculaire.lu/media/pages/home/9cb252f0ff-1663519343/uni-heidel.svg 2592000000 46244
    https://chirurgievasculaire.lu/media/pages/home/dd8c7cad04-1663516413/college-medical-1408x-220x.png 2592000000 39859
    https://chirurgievasculaire.lu/media/pages/susanne-honig/2c156aecc9-1663346145/susanne-honig-448x448.jpg 2592000000 36656
    https://chirurgievasculaire.lu/media/pages/dirk-grotemeyer/3783517d84-1663324861/dirk-grotemeyer-448x448.jpg 2592000000 35023
    https://chirurgievasculaire.lu/media/pages/daniel-manzoni/a2db1cc1c8-1663324861/daniel-manzoni-448x448.jpg 2592000000 31405
    https://chirurgievasculaire.lu/media/pages/home/466f1b0ff0-1663517685/european-union-of-medical-specialists-1408x-220x.png 2592000000 29190
    https://chirurgievasculaire.lu/media/pages/home/c16bda6fc3-1681811079/slcv-220x.png 2592000000 23390
    https://chirurgievasculaire.lu/media/pages/home/863aab90ab-1663516313/incci-1408x-220x.png 2592000000 19445
    https://chirurgievasculaire.lu/media/pages/home/bb2bf345ae-1733221312/deutsche-gesellschaft-2024-220x.png 2592000000 18359
    https://chirurgievasculaire.lu/media/pages/home/242c9d5e27-1663517799/berufsverbandes-der-phlebologen-ev-1408x-220x.png 2592000000 18155
    https://chirurgievasculaire.lu/media/pages/home/7768d99e8f-1663517614/logo-esvs-1408x-220x.png 2592000000 16765
    https://chirurgievasculaire.lu/media/pages/home/caff9e450e-1663519543/uni-lux.svg 2592000000 2868
    https://chirurgievasculaire.lu/media/pages/home/a79f7e5a7f-1663516259/hopitaux.svg 2592000000 2830
    https://chirurgievasculaire.lu/images/flags/en_round.svg 2592000000 1326
    https://chirurgievasculaire.lu/media/pages/home/dfbee57225-1663517765/dgp-logo.svg 2592000000 1306
    https://chirurgievasculaire.lu/images/flags/en.svg 2592000000 822
    https://chirurgievasculaire.lu/images/flags/fr_round.svg 2592000000 666
    https://chirurgievasculaire.lu/images/flags/de_round.svg 2592000000 661
    https://chirurgievasculaire.lu/images/flags/fr.svg 2592000000 462
    https://chirurgievasculaire.lu/images/flags/de.svg 2592000000 433

  13. Does not use 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.

    Source
    • URL: https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310
    • Line: 1
    • Column: 1037835

Passed Audits (17)

  1. 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.

  2. 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.

  3. Preload key requests

    Consider using <link rel=preload> to prioritize fetching resources that are currently requested later in page load. Learn how to preload key requests.

  4. Minify JavaScript

    Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

  5. Minify CSS

    Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

  6. Reduce unused CSS

    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.

  7. 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.

  8. 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 formats

  9. 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.

    Element
    div.glide__track > ul.glide__slides > li.glide__slide > img.w-full

  10. 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.

  11. Remove duplicate modules in JavaScript bundles

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

  12. 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.

  13. Avoid non-composited animations

    Animations which are not composited can be janky and increase CLS. Learn how to avoid non-composited animations

  14. 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 dimensions

  15. Use HTTP/2

    HTTP/2 offers many benefits over HTTP/1.1, including binary headers and multiplexing. Learn more about HTTP/2.

  16. User Timing marks and measures

    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.

  17. 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().

Accessibility 82

Contrast (1)

  1. Background and foreground colors do not have a sufficient contrast ratio.

    Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

    Failing Elements
    div.w-80 > div.flex > div.grow > a.text-[12px] Fix any of the following:
    Element has insufficient color contrast of 3.25 (foreground color: #638af3, background color: #ffffff, font size: 9.0pt (12px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    main.relative > div.relative > div.hidden > div.w-80
    div.w-80 > div.flex > a.flex > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 3.25 (foreground color: #638af3, background color: #ffffff, font size: 9.0pt (12px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    main.relative > div.relative > div.hidden > div.w-80
    main.relative > section#team_continued > h2.relative > p Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 37.5pt (50px), font weight: normal). Expected contrast ratio of 3:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > h3.font-normal Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > p.font-light Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > h3.font-normal Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > p.font-light Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > h3.font-normal Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > p.font-light Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    main.relative > section#team_continued > h2.mt-20 > p Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 37.5pt (50px), font weight: normal). Expected contrast ratio of 3:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > h3.font-normal Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div > div.max-w-[320px] > p.font-light > a.block Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div > div.max-w-[320px] > p.font-light > a.block Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > h3.font-normal Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div > div.max-w-[320px] > p.font-light > a.block Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div > div.max-w-[320px] > p.font-light > a.block Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div.flex > div > div.max-w-[320px] > h3.font-normal Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div > div.max-w-[320px] > p.font-light > a.block Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    div > div.max-w-[320px] > p.font-light > a.block Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#team_continued
    main.relative > section#partners > h2.relative > p Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 37.5pt (50px), font weight: normal). Expected contrast ratio of 3:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    div.mt-8 > ul.flex > li.px-2 > div.mt-2.5 Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 11.3pt (15px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#partners
    main.relative > section#patient_handbook > h2.relative > p Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 37.5pt (50px), font weight: normal). Expected contrast ratio of 3:1
    Related Node
    body.bg-white > main.relative > section#patient_handbook
    section#patient_handbook > div.mt-8 > div.prose > p Fix any of the following:
    Element has insufficient color contrast of 2.46 (foreground color: #ffffff, background color: #ada496, font size: 13.5pt (18px), font weight: normal). Expected contrast ratio of 4.5:1
    Related Node
    body.bg-white > main.relative > section#patient_handbook

Names and labels (2)

  1. Buttons do not 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.

    Failing Elements
    div.glide > div.absolute > div.glide__bullets > button.glide__bullet Fix any of the following:
    Element does not have inner text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute
    Element does not have an implicit (wrapped) <label>
    Element does not have an explicit <label>
    Element's default semantics were not overridden with role="none" or role="presentation"
    div.glide > div.absolute > div.glide__bullets > button.glide__bullet Fix any of the following:
    Element does not have inner text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute
    Element does not have an implicit (wrapped) <label>
    Element does not have an explicit <label>
    Element's default semantics were not overridden with role="none" or role="presentation"
    div.glide > div.absolute > div.glide__bullets > button.glide__bullet Fix any of the following:
    Element does not have inner text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute
    Element does not have an implicit (wrapped) <label>
    Element does not have an explicit <label>
    Element's default semantics were not overridden with role="none" or role="presentation"

  2. Links do not 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.

    Failing Elements
    div.relative > nav.h-full > div.md:pt-[26px] > a.block Fix all of the following:
    Element is in tab order and does not have accessible text

    Fix any of the following:
    Element does not have text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute
    div.grid > section.lg:col-span-3 > div.mx-auto > a.w-9 Fix all of the following:
    Element is in tab order and does not have accessible text

    Fix any of the following:
    Element does not have text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute
    div.grid > section.lg:col-span-3 > div.mx-auto > a.w-9 Fix all of the following:
    Element is in tab order and does not have accessible text

    Fix any of the following:
    Element does not have text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute
    div.grid > section.lg:col-span-3 > div.mx-auto > a.w-9 Fix all of the following:
    Element is in tab order and does not have accessible text

    Fix any of the following:
    Element does not have text that is visible to screen readers
    aria-label attribute does not exist or is empty
    aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
    Element has no title attribute

ARIA (1)

  1. Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those 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.

    Failing Elements
    div.mapboxgl-control-container > div.mapboxgl-ctrl-bottom-right > div.mapboxgl-ctrl > div.mapboxgl-ctrl-attrib-inner Fix any of the following:
    Element has children which are not allowed: a[aria-label]
    Related Node
    div.mapboxgl-ctrl-bottom-right > div.mapboxgl-ctrl > div.mapboxgl-ctrl-attrib-inner > a
    div.mapboxgl-ctrl-bottom-right > div.mapboxgl-ctrl > div.mapboxgl-ctrl-attrib-inner > a

Additional Items to Check Manually (10)

  1. Interactive controls are keyboard focusable

    Custom interactive controls are keyboard focusable and display a focus indicator. Learn how to make custom controls focusable.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. Custom controls have ARIA roles

    Custom interactive controls have appropriate ARIA roles. Learn how to add roles to custom controls.

Passed Audits (21)

  1. [aria-*] attributes 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.

  2. Values assigned to role="" are valid ARIA roles.

    ARIA roles enable assistive technologies to know the role of each element on the web page. If the role values are misspelled, not existing ARIA role values, or abstract roles, then the purpose of the element will not be communicated to users of assistive technologies. Learn more about ARIA roles.

  3. [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.

  4. [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.

  5. [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.

  6. [role] values are valid

    ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

  7. [aria-*] attributes have valid values

    Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.

  8. [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.

  9. 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.

  10. 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.

  11. <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.

  12. <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.

  13. 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.

  14. 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.

  15. 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.

  16. 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.

  17. 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.

  18. 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.

  19. [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.

  20. 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.

  21. 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.

Not Applicable (29)

  1. [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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. [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.

  8. 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.

  9. 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.

  10. 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.

  11. 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.

  12. 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.

  13. <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.

  14. 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.

  15. [id] attributes on active, focusable elements are unique

    All focusable elements must have a unique id to ensure that they're visible to assistive technologies. Learn how to fix duplicate ids.

  16. 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.

  17. 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.

  18. <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.

  19. <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.

  20. 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.

  21. <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.

  22. 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.

  23. <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.

  24. Skip links are focusable.

    Including a skip link can help users skip to the main content to save time. Learn more about skip links.

  25. 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.

  26. 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.

  27. <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.

  28. [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.

  29. <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.

Best Practices 100

Trust and Safety (1)

  1. 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 (14)

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. Displays images with correct aspect ratio

    Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

  6. 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.

  7. Page has the HTML doctype

    Specifying a doctype prevents the browser from switching to quirks-mode. Learn more about the doctype declaration.

  8. 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.

  9. Avoids unload event listeners

    The unload event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Use pagehide or visibilitychange events instead. Learn more about unload event listeners

  10. Avoids deprecated APIs

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

  11. Avoids third-party cookies

    Support for third-party cookies will be removed in a future version of Chrome. Learn more about phasing out third-party cookies.

  12. No browser errors 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

  13. 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
    https://chirurgievasculaire.lu/js/main.js?id=76dd95bccdfe8669152fc84321f3f310 https://chirurgievasculaire.lu/js/main.js.map

  14. 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.

Not Applicable (2)

  1. Fonts with font-display: optional are preloaded

    Preload optional fonts so first-time visitors may use them. Learn more about preloading fonts

  2. Detected JavaScript libraries

    All front-end JavaScript libraries detected on the page. Learn more about this JavaScript library detection diagnostic audit.

SEO 100

Additional Items to Check Manually (1)

  1. 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 (11)

  1. 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.

  2. 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.

  3. Document has a meta description

    Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

  4. Page has successful HTTP status code

    Pages with unsuccessful HTTP status codes may not be indexed properly. Learn more about HTTP status codes.

  5. Links have descriptive text

    Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

  6. 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

  7. 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.

  8. 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.

  9. 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.

  10. Document has a valid rel=canonical

    Canonical links suggest which URL to show in search results. Learn more about canonical links.

  11. Document avoids plugins

    Search engines can't index plugin content, and many devices restrict plugins or don't support them. Learn more about avoiding plugins.

Not Applicable (3)

  1. 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.

  2. 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.

  3. Tap targets are sized appropriately

    Interactive elements like buttons and links should be large enough (48x48px), or have enough space around them, to be easy enough to tap without overlapping onto other elements. Learn more about tap targets.

PWA 29

Installable (1)

  1. Web app manifest or service worker do not meet the installability requirements

    3 reasons

    Service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. With proper service worker and manifest implementations, browsers can proactively prompt users to add your app to their homescreen, which can lead to higher engagement. Learn more about manifest installability requirements.

    Failure reason
    Manifest start URL is not valid
    Manifest does not contain a `name` or `short_name` field
    Manifest `display` property must be one of `standalone`, `fullscreen`, or `minimal-ui`

PWA Optimized (5)

  1. Is not configured for a custom splash screen

    A themed splash screen ensures a high-quality experience when users launch your app from their homescreens. Learn more about splash screens.

    Failures:

    • Manifest does not have background_color

    • Manifest does not have theme_color

    • Manifest does not have name

  2. Does not set a theme color for the address bar.

    The browser address bar can be themed to match your site. Learn more about theming the address bar.

    Failures:

    • Manifest does not have theme_color

    • No <meta name="theme-color"> tag found

  3. Content is sized correctly for the viewport

    If the width of your app's content doesn't match the width of the viewport, your app might not be optimized for mobile screens. Learn how to size content for the viewport.

  4. 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.

  5. Manifest doesn't have a maskable icon

    A maskable icon ensures that the image fills the entire shape without being letterboxed when installing the app on a device. Learn about maskable manifest icons.

Additional Items to Check Manually (3)

  1. Site works cross-browser

    To reach the most number of users, sites should work across every major browser. Learn about cross-browser compatibility.

  2. Page transitions don't feel like they block on the network

    Transitions should feel snappy as you tap around, even on a slow network. This experience is key to a user's perception of performance. Learn more about page transitions.

  3. Each page has a URL

    Ensure individual pages are deep linkable via URL and that URLs are unique for the purpose of shareability on social media. Learn more about providing deep links.