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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.

70

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:0.15596800000000002] map[node:map[boundingRect:map[bottom:854 height:184 left:0 right:412 top:670 width:412] lhId:page-1-SECTION nodeLabel:With private messaging and calling, you can be yourself, speak freely and feel … path:1,HTML,1,BODY,1,DIV,0,DIV,1,DIV,0,DIV,2,SECTION selector:div._2y_d > div#content-wrapper > div._adhc > section._9t2b snippet:<section data-testid="waui_section" class="_9t2b _wauiSection__mediumWidth" style="background-color:#FCF5EB;"> type:node] score:0.15418 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:6361 height:61 left:24 right:149 top:6300 width:125] lhId:page-8-IMG nodeLabel:WhatsApp Main Logo path:1,HTML,1,BODY,1,DIV,1,DIV,0,DIV,0,FOOTER,1,DIV,0,SPAN,0,A,0,SPAN,0,IMG selector:span._9uog > a._asnw > span._advp > img._aeok snippet:<img class="_aeok" alt="WhatsApp Main Logo" src="https://static.whatsapp.net/rsrc.php/yM/r/ys-5GPT4pwS.svg"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:450 height:41 left:74 right:396 top:409 width:322] lhId:page-5-SPAN nodeLabel:* Data charges may apply. Contact your provider for details. path:1,HTML,1,BODY,1,DIV,0,DIV,1,DIV,0,DIV,0,SECTION,0,DIV,0,ARTICLE,1,DIV,0,SPAN selector:div._9t2c > article._9ta2 > div._9tar > span._9vg3 snippet:<span class="_9vg3 _9vd5 _aent _9sep _9vd5 _aent _aj1b" style="color:#5E5E5E;"> type:node] score:0.001788 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:6361 height:61 left:24 right:149 top:6300 width:125] lhId:page-8-IMG nodeLabel:WhatsApp Main Logo path:1,HTML,1,BODY,1,DIV,1,DIV,0,DIV,0,FOOTER,1,DIV,0,SPAN,0,A,0,SPAN,0,IMG selector:span._9uog > a._asnw > span._advp > img._aeok snippet:<img class="_aeok" alt="WhatsApp Main Logo" src="https://static.whatsapp.net/rsrc.php/yM/r/ys-5GPT4pwS.svg"> type:node]] map[cause:Web font extra:map[type:url value:https://static.whatsapp.net/rsrc.php/yN/r/fQtw5exLIdT.woff2]]] 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.

URLEst Savings
static.whatsapp.net/rsrc.php/yN/r/fQtw5exLIdT.woff275 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: woman in the city stopping to look at the messages on her phone
path: 1,HTML,1,BODY,1,DIV,0,DIV,1,DIV,0,DIV,0,SECTION,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,PICTURE,6,IMG
selector: div._ain8 > div._aina > picture._9uh7 > img._9v7q
snippet: <img alt="woman in the city stopping to look at the messages on her phone" class="_9v7q" src="https://scontent.whatsapp.net/v/t39.8562-34/668131880_929782383248177_2928…" loading="eager">

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
value: no origins were preconnected
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.

URLTransfer SizeDuration
static.whatsapp.net/rsrc.php/v4/yD/r/qDXfTrpu0Qv.js100.8 KiB600 ms
static.whatsapp.net/rsrc.php/v5/yC/l/0,cross/Jld_ox0qHt4.css3.2 KiB
static.whatsapp.net/rsrc.php/v5/yT/l/0,cross/2C6Y15M3ulD.css19.6 KiB150 ms
static.whatsapp.net/rsrc.php/v5/yf/l/0,cross/kVqnnGSuZMa.css1.9 KiB773 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.

RequestCache TTLTransfer Size
/v/t39.8562-34/659653507_956164453426749_1354931642582727...1209600.0 s40.8 KiB
/v/t39.8562-34/472788114_28309722868643717_39006718000144...1209600.0 s37.4 KiB
/v/t39.8562-34/318716890_590436546220129_8444143897573501...1209600.0 s30.1 KiB
/v/t39.8562-34/473039923_1248309032903788_228546763990592...1209600.0 s28.3 KiB
/v/t39.8562-34/314953329_693432345387154_1215169011003584...1209600.0 s21.8 KiB
/v/t39.8562-34/659198996_1263333499311132_110893147561133...1209600.0 s20.8 KiB
/v/t39.8562-34/668131880_929782383248177_2928882737729578...1209600.0 s19.8 KiB
/v/t39.8562-34/312201775_3436222206622878_599206513212171...1209600.0 s18.2 KiB
/v/t39.8562-34/656665442_4215181615403350_209439401965278...1209600.0 s8.3 KiB
/v/t39.8562-34/473051620_1130745678463614_278254744382451...1209600.0 s6.5 KiB
/v/t39.8562-34/472788341_629864479611494_9174171895768642...1209600.0 s4.5 KiB
/v/t39.8562-34/655911721_1293480736049643_682203208397811...1209600.0 s3.2 KiB
/v/t39.8562-34/657250101_2229945731166928_792335821559596...1209600.0 s3.2 KiB
/v/t39.8562-34/657609706_2270399193448511_279476224734901...1209600.0 s2.4 KiB
/v/t39.8562-34/319083687_560355302533985_4513178005349338...1209600.0 s749 B
/v/t39.8562-34/311201427_619010693228007_5878944071555156...1209600.0 s730 B

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
screenshot of end to end encrypted video call of user connecting with their fam… div#u_0_q_GE > div#u_0_r_YP > picture._9uh7 > img._9v7q
/v/t39.8562-34/314953329_693432345387154_1215169011003584...21.6 KiB8.3 KiB
whatsapp user profile image of happy lady laughing div#u_0_13_Sz > div._af05 > picture._9uh7 > img._9v7q
/v/t39.8562-34/659653507_956164453426749_1354931642582727...40.6 KiB6.4 KiB
woman in the city stopping to look at the messages on her phone div._ain8 > div._aina > picture._9uh7 > img._9v7q
/v/t39.8562-34/668131880_929782383248177_2928882737729578...19.4 KiB4.7 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: 800 ms
URLTime Spent
whatsapp.net/800 ms
www.whatsapp.com/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
With private messaging and calling, you can be yourself, speak freely and feel … div._2y_d > div#content-wrapper > div._adhc > section._9t2b
0.154
* Data charges may apply. Contact your provider for details. div._9t2c > article._9ta2 > div._9tar > span._9vg3
0.002

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 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 15.9 KiB
URLTransfer SizeEst Savings
static.whatsapp.net/rsrc.php/v5/yT/l/0,cross/2C6Y15M3ulD.css18.1 KiB15.9 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: 380 ms 133.6 KiB
URLTransfer SizeEst Savings
static.whatsapp.net/rsrc.php/v4/yD/r/qDXfTrpu0Qv.js100.5 KiB55.1 KiB
static.whatsapp.net/rsrc.php/v4/ye/r/GoPsVrX3zqn.js81.2 KiB47.7 KiB
static.whatsapp.net/rsrc.php/v4i7M54/yc/l/en_US-j/J3EtfcjxlpA.js39.3 KiB30.9 KiB

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
The page has an unload handler in the main frame.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

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
screenshot of whatsapp group customized to be called best friend group div#u_0_z_8Z > div._af05 > picture._9uh7 > img._9v7q
/v/t39.8562-34/472788114_28309722868643717_39006718000144...
screenshot of whatsapp business showing an online grocery store with products f… div#u_0_1e_AV > div#u_0_1f_9Z > picture._9uh7 > img._9v7q
/v/t39.8562-34/318716890_590436546220129_8444143897573501...
whatsapp user profile image of happy lady laughing div#u_0_13_Sz > div._af05 > picture._9uh7 > img._9v7q
/v/t39.8562-34/659653507_956164453426749_1354931642582727...
screenshot of end to end encrypted video call of user connecting with their fam… div#u_0_s_Vy > div#u_0_t_W6 > picture._9uh7 > img._9v7q
/v/t39.8562-34/473039923_1248309032903788_228546763990592...
screenshot of whatsapp feature group conversation including photo and message e… div#u_0_10_uP > div#u_0_11_PV > picture._9uh7 > img._9v7q
/v/t39.8562-34/659198996_1263333499311132_110893147561133...
whatsapp feature showing users status using happy face and heart sticker with l… div#u_0_18_ri > div#u_0_19_gk > picture._9uh7 > img._9v7q
/v/t39.8562-34/312201775_3436222206622878_599206513212171...
screenshot of end to end encrypted video call of user connecting with their fam… div#u_0_q_GE > div#u_0_r_YP > picture._9uh7 > img._9v7q
/v/t39.8562-34/314953329_693432345387154_1215169011003584...
bubbles of text saying hello in different languages with individual users icons div#u_0_n_WN > article._9ta2 > picture._9uh7 > img._9v7q
/v/t39.8562-34/472788341_629864479611494_9174171895768642...
bubbles of text saying hello in different languages with individual users icons div#u_0_j_C4 > article._9ta2 > picture._9uh7 > img._9v7q
/v/t39.8562-34/473051620_1130745678463614_278254744382451...
WhatsApp Main Page span._afw1 > a._asnw > span._advp > img._afvz
static.whatsapp.net/rsrc.php/yY/r/_mMwO8HKa4V.svg
WhatsApp Main Logo span._9uog > a._asnw > span._advp > img._aeok
static.whatsapp.net/rsrc.php/yM/r/ys-5GPT4pwS.svg

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

●Optimize DOM size
●Forced reflow
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 70 ms
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 882 KiB
●User Timing marks and measures 7 user timings
●JavaScript execution time 0.4 s
●Minimizes main-thread work 1.4 s
●Avoid long main-thread tasks 4 long tasks found
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 130 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 310 ms
○INP breakdown
○Avoid non-composited animations
88

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.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div._afvx > div._afvy > div._af8g > button#u_0_2_S7 div._afvx > div._afvy > div._af8g > button#u_0_2_S7

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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
What we do div._9vd6 > div._9vd5 > div._8l_f > h4

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Sitemap span._aeom > div._9tar > span > a._asnw

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html#facebook html#facebook

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Download div._9vd6 > div._adhc > div._asz5 > a._aeo8
Download div._9tar > span._ae_s > div._asz5 > a._aeo8
About us div._9t2j > div._9tar > div._9vd6 > a._asnw
Contact Us div._9t2j > div._9tar > div._9vd6 > a#contact_us_link_footer
Apps div._9t2j > div._9tar > div._9vd6 > a._asnw
Terms & Privacy Policy div._9t2m > span._aeom > div._9tar > a._9vcv
○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]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●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.
●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
●No element has a `[tabindex]` value greater than 0
●Skip links are focusable.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●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
○`[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
○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
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○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.
○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.
77

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLDisplayed sizeActual sizeExpected size
bubbles of text saying hello in different languages with individual users icons div#u_0_j_C4 > article._9ta2 > picture._9uh7 > img._9v7q
/v/t39.8562-34/473051620_1130745678463614_278254744382451...298 x 168332 x 187447 x 252

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
static.whatsapp.net/rsrc.php/v4/yD/r/qDXfTrpu0Qv.js line 322, col 790
●Uses HTTPS
●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
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Mitigate DOM-based XSS with Trusted Types
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Ensure proper origin isolation with COOP
○Mitigate clickjacking with XFO or CSP
○Detected JavaScript libraries
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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.whatsapp.com/callingLearn more
www.whatsapp.com/privacyLearn more
www.whatsapp.com/communityLearn more
www.whatsapp.com/messagingLearn more
business.whatsapp.com/Learn more

Format your HTML in a way that enables crawlers to better understand your app’s content.

○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 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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