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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.

33

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.

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.

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:43.522 source:map[column:12573 line:2 type:source-location url:https://www.nfl.com/_next/static/chunks/2303-8cdf0ff225e90745.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:87.591 source:map[type:text value:[unattributed]]] map[reflowTime:1.845 source:map[column:21192 line:1 type:source-location url:https://www.nfl.com/_next/static/chunks/app/%5B%5B...pages%5D%5D/page-ab1c0860b0e4ea47.js urlProvider:network]] map[reflowTime:1.181 source:map[column:10983 line:0 type:source-location url:https://www.nfl.com/_next/static/chunks/app/%5B%5B...pages%5D%5D/page-ab1c0860b0e4ea47.js urlProvider:network]] map[reflowTime:19.357 source:map[column:47084 line:0 type:source-location url:https://www.nfl.com/_next/static/chunks/4713-a73be4f31951b1e3.js urlProvider:network]] map[reflowTime:8.991 source:map[column:20838 line:0 type:source-location url:https://www.nfl.com/_next/static/chunks/4769-718348c8c7e834c1.js urlProvider:network]] map[reflowTime:2.499 source:map[column:37282 line:0 type:source-location url:https://www.nfl.com/_next/static/chunks/7790-bf9dbed8489e6381.js urlProvider:network]] map[reflowTime:0.992 source:map[column:27049 line:10 type:source-location url:https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js urlProvider:network]] map[reflowTime:12.148 source:map[column:64001 line:1 type:source-location url:https://www.nfl.com/_next/static/chunks/app/%5B%5B...pages%5D%5D/page-ab1c0860b0e4ea47.js urlProvider:network]]]

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
NFL helmet image section#FavoriteTeamCard-19 > div.rounded-sm > div.relative > img.w-40
static.www.nfl.com/league/apps/web/global/helmets/NFL.png1.7 MiB1.6 MiB
li.opacity-0 > a.snap-start > div.aspect-video > img.object-cover li.opacity-0 > a.snap-start > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/pp4avtjpmc9nat...1.1 MiB1.1 MiB
li > a.snap-start > div.aspect-video > img.object-cover li > a.snap-start > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/lgg9ibic1wld91...910.8 KiB905.1 KiB
Daniel_Whelan ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/lqnpsqdo5gpoxx...898.1 KiB894.6 KiB
David_Ojabo ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/zhwq0frk3h6ni3...836.9 KiB833.7 KiB
Travis_Clayton ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/tdbgv3ewtd2oml...821.6 KiB818.4 KiB
li > a.snap-start > div.aspect-video > img.object-cover li > a.snap-start > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/tngoai5c22voh4...693.5 KiB689.1 KiB
li > a.snap-start > div.aspect-video > img.object-cover li > a.snap-start > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/evnipafdjgfrfr...612.8 KiB607.4 KiB
div.flex > header.flex > div.flex > img.max-h-10 div.flex > header.flex > div.flex > img.max-h-10
static.www.nfl.com/league/apps/web/global/logos/logo-league-gamepass-light.png585.1 KiB584.4 KiB
li > a.snap-start > div.aspect-video > img.object-cover li > a.snap-start > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/h0th7qbkhvicnx...561.6 KiB558.1 KiB
Dante Barnett ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/v1774474534/league/qh...546.5 KiB544.4 KiB
li.opacity-0 > a.snap-start > div.aspect-video > img.object-cover li.opacity-0 > a.snap-start > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/ptlt5pq5pjo1qt...511.2 KiB508.6 KiB
Jermaine_Eluemunor ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/xqlquhcisz9ykf...403.3 KiB401.7 KiB
Charlie_Smyth ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/fpnhcibi3incbg...330.0 KiB328.7 KiB
SBChamps_RightRail_SHWK div.group > section#BasicPromoToolkit-33 > article.shadow-extended > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/x1zyyu3fomve9r...324.7 KiB285.7 KiB
li > a.flex > div.aspect-video > img.object-cover li > a.flex > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/kma65p8inbaobd...242.1 KiB201.6 KiB
RivalriesLaunch_1920x1080 div.group > section#BasicPromoToolkit-39 > article.shadow-extended > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/c3y9eedfritq05...180.2 KiB158.6 KiB
li > a.flex > div.aspect-video > img.object-cover li > a.flex > div.aspect-video > img.object-cover
/image/upload/f_auto,q_auto,dpr_2.0/league/cay5e3n1dwedeu...119.4 KiB105.1 KiB
01_LogosLockup_3840x2160 div.group > section#BasicPromoToolkit-41 > article.shadow-extended > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/jhs3ootijeq1vs...87.4 KiB84.8 KiB
01_LogosLockup_3840x2160_Flag div.group > section#BasicPromoToolkit-34 > article.shadow-extended > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/v0jmjsk5y0rhz2...77.6 KiB75.3 KiB
a.@container/card > div.group > div.py-2 > img.absolute a.@container/card > div.group > div.py-2 > img.absolute
static.www.nfl.com/o_20/league/apps/web/global/outlines/ne33.8 KiB31.6 KiB
a.@container/card > div.group > div.py-2 > img.absolute a.@container/card > div.group > div.py-2 > img.absolute
static.www.nfl.com/o_20/league/apps/web/global/outlines/sea28.3 KiB26.5 KiB
Paris Banner div.group > section#Image-10 > a > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/sosvvwazne6lp5...38.7 KiB14.7 KiB

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-15-IMG
nodeLabel: li > a.flex > div.aspect-video > img.object-cover
path: 1,HTML,1,BODY,1,DIV,11,MAIN,1,DIV,0,DIV,0,DIV,0,SECTION,1,UL,0,LI,0,A,0,DIV,0,IMG
selector: li > a.flex > div.aspect-video > img.object-cover
snippet: <img alt="" loading="lazy" decoding="async" data-nimg="fill" class="object-cover object-top" style="position: absolute; height: 100%; width: 100%; inset: 0px;" src="https://static.www.nfl.com/image/upload/f_auto,q_auto,dpr_2.0/league/kma65…">

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

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.

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: 763 ms

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.

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

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.

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 reduce Javascript execution time.

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 Evaluation4.1 s
Other1.2 s
Style & Layout728 ms
Script Parsing & Compilation585 ms
Garbage Collection149 ms
Parse HTML & CSS145 ms
Rendering140 ms

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
Daniel_Whelan ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/lqnpsqdo5gpoxx...
Charlie_Smyth ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/fpnhcibi3incbg...
Jermaine_Eluemunor ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/xqlquhcisz9ykf...
Travis_Clayton ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/tdbgv3ewtd2oml...
Dante Barnett ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/v1774474534/league/qh...
David_Ojabo ul.grid > li.flex > a.shadow-compact > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/zhwq0frk3h6ni3...
01_LogosLockup_3840x2160_Flag div.group > section#BasicPromoToolkit-34 > article.shadow-extended > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/v0jmjsk5y0rhz2...
01_LogosLockup_3840x2160 div.group > section#BasicPromoToolkit-41 > article.shadow-extended > img.w-full
/image/upload/q_auto,f_auto,dpr_2.0/league/jhs3ootijeq1vs...

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
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoid long main-thread tasks 20 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 40 ms
●Server Backend Latencies 150 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 100 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
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
8:14 VIDEOS Lorenzo Styles Jr. wakes up with 'GMFB' to discuss his journey to 2… section#EditorialCenterpiece-17 > ul.grid > li > a.flex
SEA NE section#ReplaysPackage-24 > ul.grid > li > a.@container/card
NEWS How 2 radically different FA plans could work; plus, Cousins' fit with Rai… div.flex > ul.grid > li > a.snap-start
NEWS NFL Pro: Does Fernando Mendoza fit in Klint Kubiak’s offense? div.flex > ul.grid > li > a.snap-start
NEWS Week 17 fantasy sleepers: 8 high-upside lineup picks for championship week div.flex > ul.grid > li > a.snap-start
NEWS NFL Pro fantasy football preview: Championship insights div.flex > ul.grid > li > a.snap-start
○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.
●ARIA attributes are used as specified for the element's role
●`[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 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
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○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
○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
○Links are distinguishable without relying on color.
○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
[object Event]
🚀 Failed to execute data element module core/src/lib/dataElements/customCode.js for data element identityProvider (Local Storage). Cannot read properties of null (reading 'rawData') TypeError: Cannot read properties of null (reading 'rawData') at Object.source (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:2:9278) at e.exports (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:14:9553) at https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:22958 at https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:23948 at c (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25676) at r (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25775) at s (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:26070) at o (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25932) at s (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:26130) at o (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25932)
🚀 Failed to execute data element module core/src/lib/dataElements/customCode.js for data element identityProvider (Local Storage). Cannot read properties of null (reading 'rawData') TypeError: Cannot read properties of null (reading 'rawData') at Object.source (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:2:9278) at e.exports (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:14:9553) at https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:22958 at https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:23948 at c (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25676) at r (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25775) at s (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:26070) at o (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25932) at s (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:26130) at o (https://assets.adobedtm.com/a5ea4e8f4344/1648c62d3986/launch-53368d199d70.min.js:16:25932)

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
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Detected JavaScript libraries
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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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