Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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.

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.

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:0.17991500000000013] map[node:map[boundingRect:map[bottom:3997 height:3830 left:0 right:412 top:167 width:412] lhId:page-5-DIV nodeLabel:We've updated our Terms of Use and Privacy Policy Please take a moment to revi… path:1,HTML,1,BODY,1,APP-ROOT,1,APP-HOME-PAGE,3,ONE-COLUMN-LAYOUT,2,WU-HEADER,1,SIDENAV,1,MAT-SIDENAV-CONTAINER,3,MAT-SIDENAV-CONTENT,1,DIV selector:sidenav.sidenav > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > div#inner-wrap snippet:<div _ngcontent-app-root-c1349038095="" id="inner-wrap"> type:node] score:0.167253] map[node:map[boundingRect:map[bottom:3977 height:3327 left:0 right:412 top:650 width:412] lhId:page-2-DIV nodeLabel:How You Can Fight Back Against Allergies If your “spring cold” comes with itchy… path:1,HTML,1,BODY,1,APP-ROOT,1,APP-HOME-PAGE,3,ONE-COLUMN-LAYOUT,2,WU-HEADER,1,SIDENAV,1,MAT-SIDENAV-CONTAINER,3,MAT-SIDENAV-CONTENT,1,DIV,0,SECTION,4,SECTION,1,DIV selector:div#inner-wrap > section#inner-content > section.dark-wrapper > div.region-caster snippet:<div _ngcontent-app-root-c3148859142="" class="region-caster"> type:node] score:0.010087 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://www.wunderground.com/bundle-next/media/IBMPlexSans-Regular-Latin1-YRFYPNCY.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:3977 height:3327 left:0 right:412 top:650 width:412] lhId:page-2-DIV nodeLabel:How You Can Fight Back Against Allergies If your “spring cold” comes with itchy… path:1,HTML,1,BODY,1,APP-ROOT,1,APP-HOME-PAGE,3,ONE-COLUMN-LAYOUT,2,WU-HEADER,1,SIDENAV,1,MAT-SIDENAV-CONTAINER,3,MAT-SIDENAV-CONTENT,1,DIV,0,SECTION,4,SECTION,1,DIV selector:div#inner-wrap > section#inner-content > section.dark-wrapper > div.region-caster snippet:<div _ngcontent-app-root-c3148859142="" class="region-caster"> type:node] score:0.001612 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:114 height:34 left:317 right:352 top:80 width:35] lhId:page-3-SPAN nodeLabel:gps_fixed path:1,HTML,1,BODY,1,APP-ROOT,1,APP-HOME-PAGE,3,ONE-COLUMN-LAYOUT,2,WU-HEADER,0,DIV,0,DIV,6,LIB-SEARCH,0,DIV,0,DIV,1,DIV,3,SPAN selector:div#wuForm-contain > div#wuForm > div#wuSearch-contain > span.geolocate-wrap snippet:<span class="geolocate-wrap"> type:node] score:0.000679 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNc.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:483 height:36 left:105 right:141 top:447 width:36] lhId:page-8-IMG nodeLabel:Cloudy path:1,HTML,1,BODY,1,APP-ROOT,1,APP-HOME-PAGE,3,ONE-COLUMN-LAYOUT,2,WU-HEADER,1,SIDENAV,1,MAT-SIDENAV-CONTAINER,3,MAT-SIDENAV-CONTENT,1,DIV,0,SECTION,4,SECTION,0,DIV,2,DIV,0,DIV,0,DIV,0,APP-CONDITIONS-CARD,1,DIV,0,DIV,0,DIV,0,DIV,3,DIV,0,A,0,DIV,0,DIV,2,IMG selector:a.no-style > div.forecast > div.condition-icons > img.6a snippet:<img _ngcontent-app-root-c1977517795="" class="6a hist" src="//www.wunderground.com/static/i/c/v4/26.svg" alt="Cloudy" style="width: 10%;"> type:node] score:9.9e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:483 height:36 left:224 right:260 top:447 width:36] lhId:page-12-IMG nodeLabel:icon path:1,HTML,1,BODY,1,APP-ROOT,1,APP-HOME-PAGE,3,ONE-COLUMN-LAYOUT,2,WU-HEADER,1,SIDENAV,1,MAT-SIDENAV-CONTAINER,3,MAT-SIDENAV-CONTENT,1,DIV,0,SECTION,4,SECTION,0,DIV,2,DIV,0,DIV,0,DIV,0,APP-CONDITIONS-CARD,1,DIV,0,DIV,0,DIV,0,DIV,3,DIV,0,A,0,DIV,0,DIV,5,IMG selector:a.no-style > div.forecast > div.condition-icons > img.3p snippet:<img _ngcontent-app-root-c1977517795="" class="3p" src="//www.wunderground.com/static/i/c/v4/26.svg" alt="icon" style="width: 10%;"> type:node]]] type:subitems]]]

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.

URL	Est Savings
/bundle-next/media/IBMPlexSans-SemiBold-Latin1-K4ZXQL53.w...	150 ms
fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNc.woff2	75 ms
www.wunderground.com/bundle-next/media/IBMPlexSans-Regular-Latin1-YRFYPNCY.woff2	70 ms

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:66.601 source:map[type:text value:[unattributed]]]]

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.

	URL	Resource Size	Est Savings
_ `wu-header > div.topbar > div#global-header > a#header-logo`	www.wunderground.com/static/i/o/sprite-common-grid.png?v=1.7	52.1 KiB	16.0 KiB

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.

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.

URL	Transfer Size	Duration
www.wunderground.com/bundle-next/styles-YGHHLK3N.css	44.3 KiB	755 ms
www.wunderground.com/assets/js/new-relic/new-relic.prod.ext.js	20.5 KiB	302 ms

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.

Request	Cache TTL	Transfer Size
cdn.privacy-mgmt.com/Notice.8f529.js	3600.0 s	91.2 KiB
s.w-x.co/helios/twc/1.80.4/helios.js	86400.0 s	89.1 KiB
cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js	3600.0 s	42.0 KiB
c2.taboola.com/nr/theweatherchannel-wunderground/newsroom.js	14400.0 s	16.0 KiB
www.wunderground.com/akam/13/42441b5f	21600.0 s	9.6 KiB
cdn.privacy-mgmt.com/Notice.30929.css	3600.0 s	6.7 KiB
weather.com/api/v1/script/SourcePoint.0c591e918559f02b241c.js	900.0 s	4.0 KiB
sb.scorecardresearch.com/beacon.js	86400.0 s	6.7 KiB
cdn.privacy-mgmt.com/polyfills.01516.js	3600.0 s	2.3 KiB
/newsroom/1.0/theweatherchannel-wunderground/get-action?p...	0.0 ms	268 B
/st?cijs=convusmp&ttype=45&cisd=convusmp&cipid=66361655&c...	0.0 ms	43 B
/st?cijs=convusmp&ttype=126&cisd=convusmp&cipid=66361655&...	0.0 ms	43 B

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: 781 ms

URL	Time Spent
wunderground.com/	781 ms
www.wunderground.com/	0.0 ms

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 726 ms

URL	Time Spent
www.wunderground.com/	826 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.

Element	Layout shift score
We've updated our Terms of Use and Privacy Policy Please take a moment to revi… `sidenav.sidenav > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > div#inner-wrap`	0.167
How You Can Fight Back Against Allergies If your “spring cold” comes with itchy… `div#inner-wrap > section#inner-content > section.dark-wrapper > div.region-caster`	0.010
How You Can Fight Back Against Allergies If your “spring cold” comes with itchy… `div#inner-wrap > section#inner-content > section.dark-wrapper > div.region-caster`	0.002
gps_fixed `div#wuForm-contain > div#wuForm > div#wuSearch-contain > span.geolocate-wrap`	0.001
Cloudy `a.no-style > div.forecast > div.condition-icons > img.6a`	0.000
Cloudy `a.no-style > div.forecast > div.condition-icons > img.6a`	0.000
icon `a.no-style > div.forecast > div.condition-icons > img.6p`	0.000
div.forecast > div.timeline > div.outer-bars > div.now-ball `div.forecast > div.timeline > div.outer-bars > div.now-ball`	0.000
div.forecast > div.timeline > div.outer-bars > div.now-ball `div.forecast > div.timeline > div.outer-bars > div.now-ball`	0.000
div.forecast > div.timeline > div.outer-bars > div.now-ball `div.forecast > div.timeline > div.outer-bars > div.now-ball`	0.000
Cloudy `a.no-style > div.forecast > div.condition-icons > img.6a`	0.000
Cloudy `a.no-style > div.forecast > div.condition-icons > img.6a`	0.000
Cloudy `a.no-style > div.forecast > div.condition-icons > img.12p`	0.000
icon `a.no-style > div.forecast > div.condition-icons > img.6p`	0.000
icon `a.no-style > div.forecast > div.condition-icons > img.6p`	0.000

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

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: 300 ms 50.2 KiB

URL	Transfer Size	Est Savings
www.wunderground.com/bundle-next/styles-YGHHLK3N.css	43.8 KiB	35.1 KiB
:root { --cm-video-brand-primary: var(--yb-grape-jelly, #7e1fff); --cm-video-brand-secondary: v…	16.0 KiB	15.1 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: 750 ms 613.4 KiB

URL	Transfer Size	Est Savings
cdn.taboola.com/libtrc/theweatherchannel-wunderground/loader.js	318.3 KiB	172.6 KiB
www.wunderground.com/bundle-next/chunk-KYHM4T5F.js	271.1 KiB	150.2 KiB
s.w-x.co/helios/twc/1.80.4/helios.js	88.5 KiB	73.0 KiB
vidstat.taboola.com/vpaid/units/36_0_9/infra/cmTagWIDGET_ITEM.js	105.9 KiB	56.2 KiB
vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/OvaMediaPlayer.js	87.1 KiB	54.3 KiB
www.wunderground.com/api/v1/script/dprSdkScript.js	65.6 KiB	32.9 KiB
www.wunderground.com/bundle-next/chunk-4LC4HDOP.js	49.6 KiB	28.6 KiB
www.wunderground.com/api/v1/script/upsxSdkScript.js	36.7 KiB	24.6 KiB
www.wunderground.com/api/v1/script/moduleServiceScript.js	29.7 KiB	21.0 KiB

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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.wunderground.com/	1.8 s	6.9 ms	1.1 ms
www.wunderground.com/assets/js/new-relic/new-relic.prod.ext.js	1.1 s	887 ms	6.8 ms
Unattributable	1.0 s	158 ms	0.0 ms
cdn.taboola.com/libtrc/theweatherchannel-wunderground/loader.js	694 ms	482 ms	100 ms
www.wunderground.com/bundle-next/chunk-KYHM4T5F.js	558 ms	439 ms	4.5 ms
www.wunderground.com/bundle-next/chunk-WPW6PZDG.js	310 ms	298 ms	1.1 ms
www.wunderground.com/api/v1/script/dprSdkScript.js	291 ms	257 ms	19 ms
js-agent.newrelic.com/nr-spa-1.284.1.min.js	251 ms	221 ms	16 ms
cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js	205 ms	184 ms	13 ms
www.wunderground.com/akam/13/42441b5f	168 ms	159 ms	4.0 ms
www.wunderground.com/bundle-next/polyfills-FFHMD2TL.js	162 ms	99 ms	0.2 ms
vidstat.taboola.com/vpaid/units/36_0_9/infra/cmTagWIDGET_ITEM.js	108 ms	57 ms	49 ms
s.w-x.co/helios/twc/1.80.4/helios.js	107 ms	69 ms	30 ms
vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/OvaMediaPlayer.js	97 ms	62 ms	33 ms
www.wunderground.com/api/v1/script/upsxSdkScript.js	78 ms	67 ms	11 ms
www.wunderground.com/api/v1/script/moduleServiceScript.js	71 ms	58 ms	12 ms
c2.taboola.com/nr/theweatherchannel-wunderground/newsroom.js	55 ms	47 ms	4.4 ms
cdn.privacy-mgmt.com/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js	50 ms	38 ms	12 ms

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.

Category	Time Spent
Script Evaluation	3.7 s
Other	1.6 s
Style & Layout	1.0 s
Rendering	509 ms
Script Parsing & Compilation	348 ms
Garbage Collection	98 ms
Parse HTML & CSS	74 ms

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.

URL	Transfer Size
cdn.taboola.com/libtrc/theweatherchannel-wunderground/loader.js	318.8 KiB
www.wunderground.com/bundle-next/chunk-KYHM4T5F.js	271.7 KiB
www.wunderground.com/undefined	155.1 KiB
fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNc.woff2	125.4 KiB
vidstat.taboola.com/vpaid/units/36_0_9/infra/cmTagWIDGET_ITEM.js	106.2 KiB
/taboola/image/fetch/h_434,w_780,c_pad,b_white/https://cd...	95.9 KiB
cdn.privacy-mgmt.com/Notice.8f529.js	91.2 KiB
s.w-x.co/helios/twc/1.80.4/helios.js	89.1 KiB
vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/OvaMediaPlayer.js	87.4 KiB
www.wunderground.com/bundle-next/chunk-WPW6PZDG.js	67.8 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
Storm Radar Logo `footer.primary > div.row > a > img`	www.wunderground.com/static/i/misc/sr-knockout.png
Cloudy `a.no-style > div.condition-wrap > div.condition-icon > img`	www.wunderground.com/static/i/c/v4/26.svg
Rain `a.no-style > div.forecast > div.condition-icons > img.12a`	www.wunderground.com/static/i/c/v4/12.svg
Rain Shower `a.no-style > div.forecast > div.condition-icons > img.3a`	www.wunderground.com/static/i/c/v4/11.svg
Cloudy `a.no-style > div.forecast > div.condition-icons > img.6a`	www.wunderground.com/static/i/c/v4/26.svg
Cloudy `a.no-style > div.forecast > div.condition-icons > img.9a`	www.wunderground.com/static/i/c/v4/26.svg
Cloudy `a.no-style > div.forecast > div.condition-icons > img.12p`	www.wunderground.com/static/i/c/v4/26.svg
icon `a.no-style > div.forecast > div.condition-icons > img.3p`	www.wunderground.com/static/i/c/v4/26.svg
icon `a.no-style > div.forecast > div.condition-icons > img.6p`	www.wunderground.com/static/i/c/v4/30.svg
icon `a.no-style > div.forecast > div.condition-icons > img.9p`	www.wunderground.com/static/i/c/v4/30.svg
icon `a.no-style > div.forecast > div.condition-icons > img.midnight`	www.wunderground.com/static/i/c/v4/27.svg
The Weather Company Logo `footer.primary > div.row > a > img`	www.wunderground.com/static/i/misc/twc-white.svg
Weather Underground Logo `footer.primary > div.row > a > img`	www.wunderground.com/static/i/misc/wu-knockout.svg
The Weather Channel Logo `footer.primary > div.row > a > img`	www.wunderground.com/static/i/misc/twc-knockout.svg
Access Logo `footer.primary > div.row > a.columns > img`

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

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 49 user timings

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 10 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 180 ms

●Server Backend Latencies 210 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

○INP breakdown

○LCP request discovery

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

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Menu `one-column-layout > wu-header > sidenav.sidenav > a.sidenav-toggle`

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.

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Terms of Use `div.position-wrapper > div.tou-notice > p.message > a.tou-link`
Privacy Policy `div.position-wrapper > div.tou-notice > p.message > a.tou-link`
Apr 21 `a.no-style > div.forecast > div.dates > span`
+0000 `a.no-style > div.forecast > div.dates > span`
Apr 22 `a.no-style > div.forecast > div.dates > span`
Full Forecast `div#conditions-card > div.conditions-card-inner > div.columns > a.button`

These are opportunities to improve the legibility of your content.

Names and labels

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
story-preview `app-story > div.row > div.hp-story-art-box > a.hp-story-art`
story-preview `app-story > div.row > div.hp-story-art-box > a.hp-story-art`
story-preview `app-story > div.row > div.hp-story-art-box > a.hp-story-art`
story-preview `app-story > div.row > div.hp-story-art-box > a.hp-story-art`
story-preview `app-story > div.row > div.hp-story-art-box > a.hp-story-art`

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.

○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

●Image elements have `[alt]` attributes

●Form elements have associated labels

●`[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

●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.

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Skip links are focusable.

●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 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

○Buttons have an accessible name

○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

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○No element has a `[tabindex]` value greater than 0

○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.

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.

Source	Description
z.moatads.com/weatherprebidheader264491819464/moatheader.js	`Failed to load resource: net::ERR_NAME_NOT_RESOLVED`
www.wunderground.com/undefined	`Failed to load resource: the server responded with a status of 404 ()`
www.wunderground.com/assets/js/new-relic/new-relic.prod.ext.js line 5, col 17733	`GDPR not exist`

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.

URL	Map URL
www.wunderground.com/bundle-next/chunk-KYHM4T5F.js
www.wunderground.com/api/v1/script/upsxSdkScript.js	www.wunderground.com/api/v1/script/upsxSdkScript.js.map
www.wunderground.com/api/v1/script/moduleServiceScript.js	www.wunderground.com/api/v1/script/moduleServiceScript.js.map
www.wunderground.com/api/v1/script/dprSdkScript.js	www.wunderground.com/api/v1/script/dprSdkScript.js.map
weather.com/api/v1/script/SourcePoint.0c591e918559f02b241c.js	weather.com/api/v1/script/SourcePoint.0c591e918559f02b241c.js.map

●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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

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
Menu `one-column-layout > wu-header > sidenav.sidenav > a.sidenav-toggle`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
VOLVO EX30 : Bénéficiez de 3 mois de loyer* et d’assurance** offerts Volvo `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
Découvrez notre offre sur le Volvo EX30 100% électrique Volvo `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
Et +10€ en carte cadeau Decathlon `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
La chaussure qui ne panique pas sous la pluie Decathlon `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
Contrats Auto au kilomètre : 3 formules dès 22€/mois* (Trouvez la vôtre !) Alli… `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
GMF : Assurez votre moto dès 21,81€/mois et profitez de 2 mois offertsGMF Assur… `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
Image for Taboola Advertising Unit `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-thumbnail-href`
Petits rouleurs : les 3 formules d'Allianz pour ne plus payer trop cherAllianz … `div#rbox-c2m > div#internal_trc_3371786637 > div.videoCube > a.item-label-href`
settings Settings `div.mat-drawer-inner-container > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > a.sidenav-toggle`
Sensor Network `div.mat-drawer-inner-container > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > a.sidenav-toggle`
Maps & Radar `div.mat-drawer-inner-container > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > a.sidenav-toggle`
Severe Weather `div.mat-drawer-inner-container > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > a.sidenav-toggle`
News & Blogs `div.mat-drawer-inner-container > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > a.sidenav-toggle`
Mobile Apps `div.mat-drawer-inner-container > mat-sidenav-container.mat-drawer-container > mat-sidenav-content.mat-drawer-content > a.mat-button`

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`