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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

27

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 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:27.215 source:map[column:23207 line:7 type:source-location url:https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:0.508 source:map[column:12654 line:5 type:source-location url:https://eu.puma.com/on/demandware.static/Sites-EU-Site/-/fr_FR/v1775546087502/js/vendors~pdp~plp.bundle.js urlProvider:network]] map[reflowTime:26.626 source:map[column:300003 line:6 type:source-location url:https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js urlProvider:network]] map[reflowTime:0.589 source:map[column:300347 line:6 type:source-location url:https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js urlProvider:network]]]

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: Deux mannequins présentent la collection Puma x Pokémon: homme en survêtement b…
path: 1,HTML,1,BODY,18,DIV,6,MAIN,0,DIV,1,DIV,0,DIV,2,SECTION,0,DIV,0,DIV,0,A,0,PICTURE,3,IMG
selector: div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
snippet: <img class="img-overscale" src="https://images.puma.com/image/upload/q_auto,f_auto,w_543/regional/%7Eregio…" data-alt-tablet="Deux mannequins présentent la collection Puma x Pokémon: homme en survêtem…" data-alt-mobile="Deux mannequins présentent la collection Puma x Pokémon: homme en survêtem…" alt="Deux mannequins présentent la collection Puma x Pokémon: homme en survêtem…">

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

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.

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.

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
Homme musclé en sueur, cheveux bouclés et bandeau, effectuant des exercices int… div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...30.5 KiB12.9 KiB

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

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: 752 ms
URLTime Spent
www.puma.com/752 ms
eu.puma.com/fr/fr/home0.0 ms

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

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.

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: 150 ms 35.2 KiB
URLTransfer SizeEst Savings
/on/demandware.static/Sites-EU-Site/-/fr_FR/v177554608750...37.5 KiB35.2 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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation3.8 s
Script Parsing & Compilation900 ms
Other860 ms
Style & Layout433 ms
Parse HTML & CSS262 ms
Garbage Collection106 ms
Rendering53 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.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 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 2.2 KiB
URLTransfer SizeEst Savings
.btn { border: 1px solid transparent; text-align: center; text-decoration: none; … } …9.1 KiB2.2 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
Sign up div.bordered > div > a > img
/image/upload/f_auto,q_auto/v1732091753/CRM/Emarsys_signu...
Deux mannequins présentent la collection Puma x Pokémon: homme en survêtement b… div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
Homme musclé en sueur, cheveux bouclés et bandeau, effectuant des exercices int… div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
Une athlète fait une fente avec sac lesté, observée, devant des bannières Puma. div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
Homme musclé en visière bleue et chaussures roses pousse un traîneau lesté dans… div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
Une athlète fait une fente avec sac lesté, observée, devant des bannières Puma. div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
Homme musclé en sueur, cheveux bouclés et bandeau, effectuant des exercices int… div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
Une athlète fait une fente avec sac lesté, observée, devant des bannières Puma. div.kop-hero-media > a.kop-hero-media-link > picture.kop-hero-picture > img.img-overscale
/image/upload/q_auto,f_auto,w_543/regional/~regional~EEA~...
puma-app section.p-footer-puma-icons > div.p-footer-section-links > a.p-footer-featured > img.p-footer-featured-icon
/on/demandware.static/-/Library-Sites-Shared-EEA/default/...
puma-trac section.p-footer-puma-icons > div.p-footer-section-links > a.p-footer-featured > img.p-footer-featured-icon
/on/demandware.static/-/Library-Sites-Shared-EEA/default/...
... div.p-meta-footer-inner > div.p-meta-footer-inner-left > div.p-meta-footer-language > img.p-meta-footer-language-flag
eu.puma.com/on/demandware.static/Sites-EU-Site/-/default/dwdf3be9d1/flags/fr.svg

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

●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 9 user timings
●Avoid long main-thread tasks 20 long tasks found
●Network Requests
●Network Round Trip Times 40 ms
●Server Backend Latencies 230 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 190 ms
○INP breakdown
○Avoid non-composited animations
○Avoid large layout shifts
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.

○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
●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
●`[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.
●`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
●`<frame>` or `<iframe>` elements have a title
●`<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.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○No form fields have multiple labels
○`<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
○Select elements have associated label elements.
○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.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○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.
○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
Failed to load resource: the server responded with a status of 404 ()
Refused to execute script from 'https://eu.puma.com/on/demandware.static/Sites-EU-Site/-/fr_FR/v1775546087502/js/cognigy-web-chat/cognigyWebChat.js' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.
TypeError: Cannot read properties of undefined (reading 'wpsPopup') at o.value (https://eu.puma.com/on/demandware.static/Sites-EU-Site/-/fr_FR/v1775546087502/js/global.bundle.js:1:36243) at https://eu.puma.com/on/demandware.static/Sites-EU-Site/-/fr_FR/v1775546087502/js/global.bundle.js:1:34729
Uncaught TypeError: Cannot read properties of null (reading 'addEventListener')

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●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
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

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.

Crawling and Indexing

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
div.p-header-actions > div.p-header-actions-item > div#cognigychat > a.p-header-actions-icon
Sign up div > div.bordered > div > a

To appear in search results, crawlers need access to your app.

○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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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