Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.Detailed Report
Audit breakdown by category with detailed findings.
Performance
Insights
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Performance issues directly impact user engagement and conversion rates.
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
Performance issues directly impact user engagement and conversion rates.
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
Performance issues directly impact user engagement and conversion rates.
Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.
Performance issues directly impact user engagement and conversion rates.
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
div.vy-carousel_item > div.vy-carousel-wrap_img > picture > img.vy-carousel-img div.vy-carousel_item > div.vy-carousel-wrap_img > picture > img.vy-carousel-img | static.vueling.com/corporativeCMS/media/r4bdby4g/bc_bg_1920x1280_140426w.webp | 490.2 KiB | 292.5 KiB |
vy-card-highlight > div.vy-card-highlight > picture.vy-card-highlight_picture_wrapper > img.vy-card-highlight_img vy-card-highlight > div.vy-card-highlight > picture.vy-card-highlight_picture_wrapper > img.vy-card-highlight_img | /corporativeCMS/media/h0sc1nqc/hotels_desktop_020625-resi... | 220.0 KiB | 202.5 KiB |
vy-card-highlight > div.vy-card-highlight > picture.vy-card-highlight_picture_wrapper > img.vy-card-highlight_img vy-card-highlight > div.vy-card-highlight > picture.vy-card-highlight_picture_wrapper > img.vy-card-highlight_img | static.vueling.com/corporativeCMS/media/2dblolpp/cars-webp-resized-webp.webp | 196.2 KiB | 178.7 KiB |
last card img div.vy-card-full-img_item > a > picture > img.vy-card-full-img_banner | /corporativeCMS/media/l24lctug/banner-footer-simple_bilba... | 168.0 KiB | 152.3 KiB |
main card img div.vy-card-full-img_item > a > picture > img.vy-card-full-img_banner | /corporativeCMS/media/fprktm1v/hannover_banner-footer-dob... | 165.7 KiB | 133.0 KiB |
div.vy-carousel_item > div.vy-carousel-wrap_img > picture > img.vy-carousel-img div.vy-carousel_item > div.vy-carousel-wrap_img > picture > img.vy-carousel-img | static.vueling.com/corporativeCMS/media/e30cex3c/bc_bg_1920x1280w.webp | 270.2 KiB | 109.5 KiB |
vy-spa-club-banner-picture > div.vy-featured-banner-picture_wrapper > picture > img.vy-featured-banner-picture_block vy-spa-club-banner-picture > div.vy-featured-banner-picture_wrapper > picture > img.vy-featured-banner-picture_block | static.vueling.com/corporativeCMS/media/zfwdrpf1/imagen-vyclub_okw.webp | 127.4 KiB | 81.5 KiB |
div.find-adventure_grid > a.find-adventure_card > picture > img.find-adventure_card_image div.find-adventure_grid > a.find-adventure_card > picture > img.find-adventure_card_image | static.vueling.com/corporativeCMS/media/kl0dk4rp/urbano_desktop_w.webp | 115.7 KiB | 64.1 KiB |
vy-card-highlight > div.vy-card-highlight > picture.vy-card-highlight_picture_wrapper > img.vy-card-highlight_img vy-card-highlight > div.vy-card-highlight > picture.vy-card-highlight_picture_wrapper > img.vy-card-highlight_img | static.vueling.com/corporativeCMS/media/cr4og2xq/activities_211124_webp.webp | 51.4 KiB | 39.0 KiB |
middle card img div.vy-card-full-img_item > a > picture > img.vy-card-full-img_banner | static.vueling.com/corporativeCMS/media/2ywhgwlg/vuelign_visa_s_en_webp.webp | 42.3 KiB | 31.8 KiB |
div.vy-carousel_item > div.vy-carousel-wrap_img > picture > img.vy-carousel-img div.vy-carousel_item > div.vy-carousel-wrap_img > picture > img.vy-carousel-img | static.vueling.com/corporativeCMS/media/4vtgvimy/bc_bg_1920x1280w.webp | 65.7 KiB | 26.6 KiB |
Amsterdam article.vy-card-offer > div.vy-card-offer_picture > picture > img.vy-card-offer_img | static.vueling.com/corporativeCMS/media/yewdyfvm/408-229-amsterdam-ams-webp.webp | 34.9 KiB | 26.3 KiB |
div.find-adventure_grid > a.find-adventure_card > picture > img.find-adventure_card_image div.find-adventure_grid > a.find-adventure_card > picture > img.find-adventure_card_image | static.vueling.com/corporativeCMS/media/lkeb1qlp/airelibre_desktop_w.webp | 29.1 KiB | 17.3 KiB |
div.find-adventure_grid > a.find-adventure_card > picture > img.find-adventure_card_image div.find-adventure_grid > a.find-adventure_card > picture > img.find-adventure_card_image | static.vueling.com/corporativeCMS/media/oblf03nu/calidos_invierno_desktop_w.webp | 33.9 KiB | 9.5 KiB |
Edinburgh article.vy-card-offer > div.vy-card-offer_picture > picture > img.vy-card-offer_img | static.vueling.com/corporativeCMS/media/s1jdo3sj/408-229-edinburgh-edi-webp.webp | 22.7 KiB | 8.6 KiB |
Rome (Fiumicino) article.vy-card-offer > div.vy-card-offer_picture > picture > img.vy-card-offer_img | static.vueling.com/corporativeCMS/media/fetny4et/408-229-rome-fco-webp.webp | 22.5 KiB | 8.4 KiB |
Get the Vueling app on Google Play ul.vy-list-horizontal_container > li.vy-list-horizontal_item > a.vy-list-horizontal_item_link > img.ng-star-inserted | static.vueling.com/corporativeCMS/media/sw4hgsii/google-play-badge2x.png | 6.4 KiB | 5.8 KiB |
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
Performance issues directly impact user engagement and conversion rates.
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Duration |
|---|---|---|
| static.vueling.com/assets/styles/gridLayout.css | 757 B | 372 ms |
| www.vueling.com/resources/a964080c97d1812b778ef6340201418e1780013facd85 | 56.7 KiB | 135 ms |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Performance issues directly impact user engagement and conversion rates.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| vueling.com/ | 621 ms |
| www.vueling.com/ | 652 ms |
| www.vueling.com/en | 0.0 ms |
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
body.en-GB body.en-GB | 0.629 |
FLIGHTS
HOTELS
CARS
From
BCN
To
Outbound
Return
1 Adult , 0 Children , 0 Infant… div.body-wrapper > main > div#main-content > div.main-search_content | 0.036 |
REJECT ALL
ACCEPT ALL COOKIES
MANAGE YOUR COOKIE SETTINGS div#onetrust-banner-sdk > div.ot-sdk-container > div.ot-sdk-row > div#onetrust-button-group-parent | 0.013 |
div div | 0.000 |
One unread message in chat. Open chat div > div.webchat-root > div > button.webchat-toggle-button | 0.000 |
1 Passenger div | 0.000 |
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.
Performance issues directly impact user engagement and conversion rates.
Diagnostics
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 7.6 s |
| Other | 1.2 s |
| Script Parsing & Compilation | 280 ms |
| Style & Layout | 220 ms |
| Garbage Collection | 168 ms |
| Rendering | 55 ms |
| Parse HTML & CSS | 43 ms |
Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| The page has an unload handler in the main frame. | Actionable |
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| The page has an unload handler in a sub frame. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| static.vueling.com/corporativeCMS/Js/lib/jquery-3.2.1.min.js | 31.5 KiB | 5.7 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| #onetrust-banner-sdk{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%} … | 21.6 KiB | 18.4 KiB |
| about:blank | 10.1 KiB | 10.1 KiB |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
Get the Vueling app on Google Play ul.vy-list-horizontal_container > li.vy-list-horizontal_item > a.vy-list-horizontal_item_link > img.ng-star-inserted | static.vueling.com/corporativeCMS/media/sw4hgsii/google-play-badge2x.png |
Get the Vueling app on the Apple Store ul.vy-list-horizontal_container > li.vy-list-horizontal_item > a.vy-list-horizontal_item_link > img.ng-star-inserted | static.vueling.com/corporativeCMS/media/pocfqhd4/app_store.svg |
More information about the performance of your application. These numbers don't directly affect the Performance score.
Accessibility
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
ARIA
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
COOKIE POLICY
We use our own and third-party cookies for analytical, personali… body.en-GB > div#onetrust-consent-sdk > div#onetrust-banner-sdk |
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Names and labels
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
vy-carousel-navigation > div.vy-carousel-navigation > div.vy-carousel > button.vy-carousel_control--button vy-carousel-navigation > div.vy-carousel-navigation > div.vy-carousel > button.vy-carousel_control--button |
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Best practices
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.
Informational: a Permissions-Policy directive showing feature -> allowed origins.
Source: MDN Permissions-Policy
| Failing Elements |
|---|
head > meta head > meta |
These items highlight common accessibility best practices.
Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Cookie policy div#onetrust-group-container > div#onetrust-policy > p#onetrust-policy-text > a.ot-cookie-policy-link |
Best Practices
General
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| Unload event listeners are deprecated and will be removed. |
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
Access to CSS stylesheet at 'https://static.vueling.com/assets/styles/gridLayout.css' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Access to CSS stylesheet at 'https://static.vueling.com/assets/styles/spinner.css' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Access to CSS stylesheet at 'https://static.vueling.com/Chatbots/VY/V4/CSS/common/base-webchat-style.css' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Access to CSS stylesheet at 'https://static.vueling.com/Chatbots/VY/V4/CSS/common/file-upload.webchat-plugin.css' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Access to CSS stylesheet at 'https://static.vueling.com/Chatbots/VY/V4/CSS/common/vueling-webchat-form-style.css' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Access to CSS stylesheet at 'https://static.vueling.com/Chatbots/VY/V4/CSS/custom/vueling-metachatbot-webchat-style.css' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Access to CSS stylesheet at 'https://static.vueling.com/corporativeCMS/WebComponents/home/browser/home.css?v=639118896464479481' from origin 'https://www.vueling.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Failed to load resource: net::ERR_FAILED | |
Failed to load resource: net::ERR_FAILED | |
Failed to load resource: net::ERR_FAILED | |
Failed to load resource: net::ERR_FAILED | |
Failed to load resource: net::ERR_FAILED | |
Failed to load resource: net::ERR_FAILED | |
Failed to load resource: net::ERR_FAILED |
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.
Performance issues directly impact user engagement and conversion rates.
SEO
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.
Content Best Practices
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
Performance issues directly impact user engagement and conversion rates.
| Link destination | Link Text |
|---|---|
| www.vueling.com/en/customer-services/cookie-policy | More information |
Format your HTML in a way that enables crawlers to better understand your app’s content.