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Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

63

Performance

Insights

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

Why this matters

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

Why this matters

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.

Why this matters

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...14400.0 s3.3 MiB
www.visa.es/etc.clientlibs/cms-rest/clientlibs/cms-jquery.min.js14400.0 s109.5 KiB
usa.visa.com/etc/ui/headless-ui/styles/core/assets/fonts/icons/visaFont.woff14400.0 s78.2 KiB
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...14400.0 s67.5 KiB
tags.tiqcdn.com/utag/visa/visa-com-europe/prod/utag.js300.0 s44.9 KiB
usa.visa.com/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/vcom.css14400.0 s35.4 KiB
policy.cookiereports.com/439c3d1f_panel-es.js3600.0 s26.7 KiB
/content/dam/VCOM/global/navigation/images/leading-by-exa...14400.0 s30.2 KiB
www.visa.es/content/dam/VCOM/global/navigation/images/visa-developer-400x225.jpg14400.0 s29.6 KiB
/content/dam/VCOM/global/navigation/images/caring-for-our...14400.0 s29.3 KiB
cdn.visa.com/cdn/scripts/components/3.7.5/navigation.js14400.0 s27.8 KiB
/content/dam/VCOM/global/navigation/images/people-possibi...14400.0 s27.3 KiB
/etc/ui/headless-ui/styles/core/assets/fonts/types/dialec...14400.0 s26.9 KiB
/etc/ui/headless-ui/styles/core/assets/fonts/types/dialec...14400.0 s26.7 KiB
/etc/ui/headless-ui/styles/core/assets/fonts/types/dialec...14400.0 s26.3 KiB
/content/dam/VCOM/global/navigation/images/supporting-com...14400.0 s25.5 KiB
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...14400.0 s23.8 KiB
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...14400.0 s22.3 KiB
/content/dam/VCOM/global/navigation/images/visa-developer...14400.0 s19.5 KiB
www.visa.es/etc/ui/visa-stencil/build/p-DcOW36bG.js14400.0 s11.3 KiB
cdn.visa.com/v2/assets/images/logos/visa/blue/logo.png14400.0 s9.8 KiB
www.visa.es/etc/ui/visa-stencil/assets/analytics/analytics.js14400.0 s7.6 KiB
/etc/ui/headless-ui/scripts/core/stencil-components/promo...14400.0 s6.9 KiB
/etc/ui/headless-ui/scripts/core/stencil-components/promo...14400.0 s6.5 KiB
/etc/ui/headless-ui/scripts/core/stencil-components/promo...14400.0 s5.5 KiB
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/globa...14400.0 s5.2 KiB
www.visa.es/etc/ui/visa-stencil/build/visa-reimagine.esm.js14400.0 s4.4 KiB
www.visa.es/etc/ui/visa-stencil/assets/animation/scroll-animation.js14400.0 s4.2 KiB
/etc.clientlibs/cms-rest/components/core/brand-blade-cont...14400.0 s3.9 KiB
www.visa.es/etc.clientlibs/cms-rest/clientlibs/modal.min.js14400.0 s3.6 KiB
www.visa.es/etc/ui/headless-ui/scripts/core/analytics.js14400.0 s3.5 KiB
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/...14400.0 s3.1 KiB
policy.cookiereports.com/i/visa/new-window-gold.svg3600.0 s2.5 KiB
/content/dam/VCOM/global/homepage/home-images/visa-icon-p...14400.0 s2.3 KiB
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/globa...14400.0 s2.2 KiB
/utag/visa/visa-com-europe/prod/utag.15.js?utv=ut4.51.202...300.0 s1.5 KiB
www.visa.es/etc.clientlibs/cms-rest/clientlibs/tealium.min.js14400.0 s1.9 KiB
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/globa...14400.0 s1.8 KiB
/etc.clientlibs/cms-rest/components/core/marquee-containe...14400.0 s1.6 KiB
/content/dam/VCOM/global/homepage/home-images/visa-icon-p...14400.0 s1.5 KiB
www.visa.es/etc.clientlibs/rvcom/rvcom-clientlibs/newFonts.min.css14400.0 s1.5 KiB
tags.tiqcdn.com/utag/visa/visa-com-europe/prod/utag.sync.js300.0 s989 B
/content/dam/VCOM/global/homepage/home-images/visa-icon-s...14400.0 s1.2 KiB
policy.cookiereports.com/i/visa/white_trans_down_18px.png3600.0 s875 B
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/...14400.0 s1.0 KiB
/etc/ui/headless-ui/scripts/core/stencil-components/promo...14400.0 s959 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/lazyloading-plugin.min.js14400.0 s923 B
/utag/tiqapp/utag.v.js?a=visa/visa-com-europe/20260416133...300.0 s430 B
/etc/ui/headless-ui/scripts/core/stencil-components/promo...14400.0 s591 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/clientlib-accessibility.min.js14400.0 s504 B
/etc.clientlibs/cms-rest/components/core/marquee-containe...14400.0 s393 B
/etc.clientlibs/cms-rest/components/core/simple-content-t...14400.0 s357 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/inview-plugin.min.js14400.0 s320 B
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/...14400.0 s295 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/throttle-plugin.min.js14400.0 s264 B
/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/...14400.0 s263 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.944362] map[node:map[boundingRect:map[bottom:2408 height:2298 left:0 right:1350 top:110 width:1350] lhId:page-1-BODY nodeLabel:body.vs-body path:1,HTML,1,BODY selector:body.vs-body snippet:<body class="vs-body"> type:node] score:0.942037] map[node:map[boundingRect:map[bottom:70 height:30 left:168 right:1337 top:40 width:1169] lhId:page-3-DIV nodeLabel:ParticularesEmpresasInnovadoresTodo el mundo path:1,HTML,1,BODY,1,DIV,0,HEADER,0,DIV,2,DIV,0,DIV,1,DIV selector:div > div.vs-container > div.vs-row > div.vs-col snippet:<div class="vs-col" style="position: static;"> type:node] score:0.002318] map[node:map[boundingRect:map[bottom:829 height:43 left:1267 right:1310 top:786 width:43] lhId:page-2-BUTTON nodeLabel:Video ambiental de pausa - 7048e11b2c path:1,HTML,1,BODY,8,MAIN,0,DIV,3,DIV,0,DIV,9,DIV,6,DIV,4,BUTTON selector:div.heromarquee-item > div.vs-carousel > div.vs-carousel-content > button.vs-hero-pause-btn snippet:<button aria-label="Video ambiental de pausa - 7048e11b2c" class="vs-hero-pause-btn hero-video-btn-white"> type:node] score:7e-06]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
usa.visa.com/etc/ui/headless-ui/styles/core/assets/fonts/icons/visaFont.woff85 ms

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: vcarb car
path: 1,HTML,1,BODY,8,MAIN,0,DIV,3,DIV,0,DIV,9,DIV,2,IMG
selector: div.vs-mb-3 > div.heromarquee-item > div.vs-carousel > img.vs-img-placeholder
snippet: <img alt="vcarb car" class="vs-img-placeholder vs-img-fluid vs-vertical-image vs-hero-marquee-media vs…" src="/content/dam/VCOM/regional/ve/unitedkingdom/in-page-images/redbull/vcarb-h…">

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
vcarb car div.vs-mb-3 > div.heromarquee-item > div.vs-carousel > img.vs-img-placeholder
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...67.2 KiB34.0 KiB
Visa Home div.vs-row > div.vs-col-auto > a.vs-nav-logo > img
cdn.visa.com/v2/assets/images/logos/visa/blue/logo.png7.0 KiB6.4 KiB

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.visa.es/etc.clientlibs/cms-rest/clientlibs/cms-jquery.min.js109.5 KiB277 ms
www.visa.es/etc.clientlibs/cms-rest/clientlibs/clientlib-accessibility.min.js504 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/tealium.min.js1.9 KiB
www.visa.es/etc.clientlibs/cms-rest/clientlibs/lazyloading-plugin.min.js923 B
/etc.clientlibs/cms-rest/components/core/marquee-containe...393 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/inview-plugin.min.js320 B
www.visa.es/etc.clientlibs/cms-rest/clientlibs/throttle-plugin.min.js264 B
www.visa.es/etc.clientlibs/rvcom/rvcom-clientlibs/newFonts.min.css1.5 KiB
tags.tiqcdn.com/utag/visa/visa-com-europe/prod/utag.sync.js989 B202 ms

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

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 60 ms 31.5 KiB
URLTransfer SizeEst Savings
usa.visa.com/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/vcom.css35.2 KiB31.5 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 110 ms 135.3 KiB
URLTransfer SizeEst Savings
www.visa.es/etc.clientlibs/cms-rest/clientlibs/cms-jquery.min.js109.4 KiB83.1 KiB
www.googletagmanager.com/gtag/js?id=AW-16736624984145.7 KiB52.2 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 2.0 KiB
URLTransfer SizeEst Savings
.headerReveal1.scroll-down > p:nth-child(1) { animation-delay: calc(var(--word-delay, 0ms) * 0); } …5.6 KiB2.0 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 4.6 KiB
URLTransfer SizeEst Savings
www.visa.es/etc/ui/visa-stencil/assets/analytics/analytics.js7.6 KiB2.3 KiB
www.visa.es/etc/ui/visa-stencil/assets/analytics/analytics.js7.6 KiB2.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...3.3 MiB
www.googletagmanager.com/gtag/js?id=AW-16736624984146.0 KiB
www.visa.es/etc.clientlibs/cms-rest/clientlibs/cms-jquery.min.js109.5 KiB
usa.visa.com/etc/ui/headless-ui/styles/core/assets/fonts/icons/visaFont.woff78.2 KiB
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...67.5 KiB
tags.tiqcdn.com/utag/visa/visa-com-europe/prod/utag.js44.9 KiB
usa.visa.com/etc/ui/headless-ui/styles/core/1.0.0/assets/styles/vcom/vcom.css35.4 KiB
/content/dam/VCOM/global/navigation/images/leading-by-exa...30.2 KiB
www.visa.es/content/dam/VCOM/global/navigation/images/visa-developer-400x225.jpg29.6 KiB
/content/dam/VCOM/global/navigation/images/caring-for-our...29.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
li > div#vs-lowernav-sub-list-2 > div.vs-col-12 > img.vs-submenu-img li > div#vs-lowernav-sub-list-2 > div.vs-col-12 > img.vs-submenu-img
/content/dam/VCOM/global/navigation/images/visa-developer...
Workers looking at a laptop li > div#vs-lowernav-sub-list-2 > div.vs-col-12 > img.vs-submenu-img
/content/dam/VCOM/regional/ve/unitedkingdom/in-page-image...
li > div#vs-lowernav-sub-list-2 > div.vs-col-12 > img.vs-submenu-img li > div#vs-lowernav-sub-list-2 > div.vs-col-12 > img.vs-submenu-img
www.visa.es/content/dam/VCOM/global/navigation/images/visa-developer-400x225.jpg
li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img
/content/dam/VCOM/global/navigation/images/leading-by-exa...
li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img
/content/dam/VCOM/global/navigation/images/people-possibi...
li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img
/content/dam/VCOM/global/navigation/images/supporting-com...
li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img li > div#vs-lowernav-sub-list-3 > div.vs-col-12 > img.vs-submenu-img
/content/dam/VCOM/global/navigation/images/caring-for-our...
Visa Home div.vs-row > div.vs-col-auto > a.vs-nav-logo > img
cdn.visa.com/v2/assets/images/logos/visa/blue/logo.png
woman smiling at dog on sofa with laptop displaying Visa Checkout div.vs-col-12 > a.vs-ct > div.vs-bg-tertiary-1-gradient > img.vs-ct-image
premium cards div.vs-col-12 > a.vs-ct > div.vs-bg-primary-dark-gradient > img.vs-ct-image
formula one car div.vs-col-12 > a.vs-ct > div.vs-bg-tertiary-1-gradient > img.vs-ct-image
woman laughing div.vs-col-12 > a.vs-ct > div.vs-bg-secondary-dark-gradient > img.vs-ct-image
Highway div.vs-col-12 > a.vs-ct > div.vs-bg-black-gradient > img.vs-ct-image
Visa tap to phone div.vs-col-12 > a.vs-ct > div.vs-bg-tertiary-1-gradient > img.vs-ct-image
person taking a photo of a church on a phone div.vs-col-12 > a.vs-ct > div.vs-bg-secondary-dark-gradient > img.vs-ct-image
Smiling women div.vs-col-12 > a.vs-ct > div.vs-bg-black-gradient > img.vs-ct-image
misty mountain div.vs-col-12 > a.vs-ct > div.vs-bg-tertiary-1-gradient > img.vs-ct-image

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 640 ms
URLTime Spent
visa.com/252 ms
www.visa.com/389 ms
www.visa.es/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

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
body.vs-body body.vs-body
0.942
ParticularesEmpresasInnovadoresTodo el mundo div > div.vs-container > div.vs-row > div.vs-col
0.002
Video ambiental de pausa - 7048e11b2c div.heromarquee-item > div.vs-carousel > div.vs-carousel-content > button.vs-hero-pause-btn
0.000
●Time to Interactive 2.1 s
●Max Potential First Input Delay 70 ms
●Optimize DOM size
●Forced reflow
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 9 user timings
●JavaScript execution time 0.2 s
●Minimizes main-thread work 0.8 s
●Avoid long main-thread tasks 1 long task found
●Avoid non-composited animations 10 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 50 ms
●Server Backend Latencies 140 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 60 ms
○INP breakdown
100

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
CLICK TO PAY CON VISA Regístrare y paga en ecommerce con un clic. Abrir en Nue… div.vs-container-fluid > div.vs-row > div.vs-col-12 > a.vs-ct
DESCUBRE MYVISA Detrás de myVisa hay un nuevo espacio de beneficios Abrir en N… div.vs-container-fluid > div.vs-row > div.vs-col-12 > a.vs-ct
DE VIAJE Escoge Visa cuando pagas div.vs-container-fluid > div.vs-row > div.vs-col-12 > a.vs-ct
INCLUSIVIDAD Abriendo Puertas div.vs-container-fluid > div.vs-row > div.vs-col-12 > a.vs-ct
CONTACTA CON NOSOTROS Te ayudamos estés donde estés div.vs-container-fluid > div.vs-row > div.vs-col-12 > a.vs-ct
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●Select elements have associated label elements.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
○`[accesskey]` values are unique
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.visa.es/etc/ui/visa-stencil/assets/animation/scroll-animation.js
SyntaxError: Identifier 'ScrollAnimations' has already been declared
www.visa.es/etc/ui/visa-stencil/assets/analytics/analytics.js
SyntaxError: Identifier 'VALID_COMPONENT_TAGS' has already been declared
www.visa.es/
Unrecognized Content-Security-Policy directive 'self'.
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

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