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.

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
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-SLOT1...	86400.0 s	581.1 KiB
js.stripe.com/clover/stripe.js	120.0 s	225.0 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-SLOT1...	86400.0 s	202.2 KiB
cdn.amplitude.com/script/8b91e3eff649558ed402aa2538381888.experiment.js	60.0 s	43.7 KiB
/signals/config/259225634270360?v=2.9.303&r=stable&domain...	1200.0 s	44.9 KiB
/images/G/01/zappos/ui/fonts/modern-gothic-regular._CB175...	3600.0 s	34.9 KiB
/images/G/01/zappos/ui/fonts/modern-gothic-bold._CB175312...	3600.0 s	34.8 KiB
cdn.id5-sync.com/api/1.0/id5-api.js	3600.0 s	34.4 KiB
/images/G/01/zappos/ui/fonts/modern-gothic-medium._CB1751...	3600.0 s	33.7 KiB
/images/G/01/zappos/ui/fonts/modern-gothic-light._CB17531...	3600.0 s	33.5 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-EARTH...	86400.0 s	54.6 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-HO...	86400.0 s	45.7 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-BR...	86400.0 s	45.6 KiB
dynamic.criteo.com/js/ld/ld.js?a=1731	10800.0 s	24.7 KiB
m.stripe.network/out-4.5.45.js	300.0 s	16.5 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-AS...	86400.0 s	37.0 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-NI...	86400.0 s	36.0 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-NE...	86400.0 s	32.9 KiB
/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...	86400.0 s	30.2 KiB
/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...	86400.0 s	29.0 KiB
/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...	86400.0 s	28.2 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-ON...	86400.0 s	27.6 KiB
/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...	86400.0 s	21.9 KiB
stapecdn.com/dtag/v8.js	3600.0 s	7.9 KiB
www.upsellit.com/active/zappos.jsp	86400.0 s	8.2 KiB
/images/G/01/Zappos/2025/zappos-logo-new/Newstlogonpaddin...	86400.0 s	2.1 KiB
/config/com/2968385f-e935-40e8-8cea-88ea0aa5a67d.js?v=3.5...	0.0 ms	462 B
/_/set_cookie?val=N0rqEJ2b5Qk6jmr4gWrQa6gcaG1mL3HlIF6sblW...	0.0 ms	48 B

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:201.249 source:map[column:107275 line:1 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/8315-e5d0b0f7b97f9546.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:1.86 source:map[column:1756 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/357-8435004aabd9e458.js urlProvider:network]] map[reflowTime:2.808 source:map[column:14467 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/6713-6c26689a3b3747a4.js urlProvider:network]] map[reflowTime:19.182 source:map[column:32004 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/2401-dcf64d72e0367e5a.js urlProvider:network]] map[reflowTime:205.215 source:map[column:8259 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/8463-1eb92ab25e18e6e7.js urlProvider:network]] map[reflowTime:11.543 source:map[column:839 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/app/layout-023b1f677d096c6e.js urlProvider:network]] map[reflowTime:5.157 source:map[column:13448 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/8787-83e3e021d26c3f47.js urlProvider:network]] map[reflowTime:1.667 source:map[type:text value:[unattributed]]] map[reflowTime:0.57 source:map[column:1616 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/357-8435004aabd9e458.js urlProvider:network]] map[reflowTime:1.658 source:map[column:3915 line:0 type:source-location url:https://assets.services.prod.kratos.zappos.com/kratos-assets/_next/static/chunks/8787-83e3e021d26c3f47.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.

	URL	Resource Size	Est Savings
div.m-auto > div.relative > picture.pointer-events-none > img.h-full `div.m-auto > div.relative > picture.pointer-events-none > img.h-full`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-SLOT1...	201.1 KiB	111.5 KiB
Earth Tones Inspired by nature. Rooted in the moment. Shop Now `div.flex > div#mar-31275947 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-EARTH...	53.9 KiB	29.9 KiB
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-HO...	44.8 KiB	6.8 KiB
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-BR...	44.7 KiB	6.7 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.

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
/kratos-assets/_next/static/css/67f2cf6ccaca6252.css	24.0 KiB	999 ms
/kratos-assets/_next/static/css/78db2d5d0b8b5f12.css	1.1 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: 819 ms

URL	Time Spent
zappos.com/	819 ms
www.zappos.com/	0.0 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

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
/kratos-assets/_next/static/chunks/8315-e5d0b0f7b97f9546.js	5.9 s	4.1 s	22 ms
www.zappos.com/	2.4 s	166 ms	197 ms
Unattributable	2.0 s	110 ms	0.0 ms
/kratos-assets/_next/static/chunks/2401-dcf64d72e0367e5a.js	566 ms	557 ms	6.5 ms
www.googletagmanager.com/gtm.js?id=GTM-M3HN5KQH	478 ms	381 ms	63 ms
www.googletagmanager.com/gtag/js?id=G-8VWCJY5CWM&cx=c&gtm=4e64k0	471 ms	408 ms	56 ms
js.stripe.com/clover/stripe.js	380 ms	242 ms	136 ms
connect.facebook.net/en_US/fbevents.js	369 ms	328 ms	38 ms
/kratos-assets/_next/static/chunks/87c73c54-2ddfe8b2f2752...	322 ms	263 ms	19 ms
cdn.amplitude.com/libs/analytics-browser-gtm-wrapper-3.15.0.js.br	271 ms	212 ms	53 ms
/signals/config/259225634270360?v=2.9.303&r=stable&domain...	227 ms	207 ms	19 ms
dynamic.criteo.com/js/ld/ld.js?a=1731	181 ms	166 ms	7.5 ms
sc-static.net/scevent.min.js	130 ms	115 ms	6.2 ms
bat.bing.com/bat.js	113 ms	82 ms	27 ms
cdn.amplitude.com/script/8b91e3eff649558ed402aa2538381888.experiment.js	89 ms	71 ms	18 ms
/config/com/2968385f-e935-40e8-8cea-88ea0aa5a67d.js?v=3.5...	88 ms	23 ms	0.4 ms
cdn.id5-sync.com/api/1.0/id5-api.js	87 ms	63 ms	13 ms
cdn.amplitude.com/libs/analytics-browser-gtm-2.12.2-min.js.gz	70 ms	54 ms	13 ms
/kratos-assets/_next/static/chunks/5440-159a12cf0b74d7f8.js	70 ms	3.8 ms	6.2 ms
www.zappos.com/marty-assets/microsoft-uet-tag-zappos.html	54 ms	34 ms	1.7 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	8.0 s
Other	3.3 s
Style & Layout	1.8 s
Script Parsing & Compilation	980 ms
Parse HTML & CSS	491 ms
Garbage Collection	426 ms
Rendering	202 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 reason	Failure type
The page has an unload handler in the main frame.	Actionable
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable

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: 0.0 ms 19.5 KiB

URL	Transfer Size	Est Savings
/kratos-assets/_next/static/css/67f2cf6ccaca6252.css	23.6 KiB	19.5 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 515.6 KiB

URL	Transfer Size	Est Savings
js.stripe.com/clover/stripe.js	224.6 KiB	163.4 KiB
www.googletagmanager.com/gtag/js?id=G-8VWCJY5CWM&cx=c&gtm=4e64k0	164.6 KiB	63.7 KiB
cdn.amplitude.com/libs/analytics-browser-gtm-wrapper-3.15.0.js.br	73.6 KiB	56.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-M3HN5KQH	146.7 KiB	56.1 KiB
/kratos-assets/_next/static/chunks/3769-2c1f1d1de825d91c.js	65.2 KiB	52.3 KiB
/kratos-assets/_next/static/chunks/3615-8e1b56a65e247c87.js	70.4 KiB	35.8 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	33.1 KiB
/kratos-assets/_next/static/chunks/2382-bf835854fcb2264b.js	45.9 KiB	29.9 KiB
cdn.amplitude.com/script/8b91e3eff649558ed402aa2538381888.experiment.js	43.4 KiB	24.4 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-SLOT1...	581.1 KiB
js.stripe.com/clover/stripe.js	225.0 KiB
/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-SLOT1...	202.2 KiB
www.zappos.com/	182.3 KiB
www.googletagmanager.com/gtag/js?id=G-8VWCJY5CWM&cx=c&gtm=4e64k0	164.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-M3HN5KQH	147.0 KiB
connect.facebook.net/en_US/fbevents.js	96.6 KiB
/kratos-assets/_next/static/chunks/3615-8e1b56a65e247c87.js	74.3 KiB
cdn.amplitude.com/libs/analytics-browser-gtm-wrapper-3.15.0.js.br	74.1 KiB
/kratos-assets/_next/static/chunks/3769-2c1f1d1de825d91c.js	70.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
Earth Tones Inspired by nature. Rooted in the moment. Shop Now `div.flex > div#mar-31275947 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-EARTH...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-HO...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-NI...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-BR...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-ON...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-NE...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.19.26/HP-VN-AS...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`	/images/G/01/zappos/2026/Homepage/April/04.12.26/HP-VIZ-N...
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`
article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain `article.relative > div#mar-1416210742 > picture.w-fit > img.object-contain`
article.relative > div#mar-849890032 > picture.w-fit > img.object-contain `article.relative > div#mar-849890032 > picture.w-fit > img.object-contain`
article.relative > div#mar-849890032 > picture.w-fit > img.object-contain `article.relative > div#mar-849890032 > picture.w-fit > img.object-contain`
article.relative > div#mar-849890032 > picture.w-fit > img.object-contain `article.relative > div#mar-849890032 > picture.w-fit > img.object-contain`

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

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 15 user timings

●Avoid long main-thread tasks 20 long tasks found

●Network Requests

●Network Round Trip Times 160 ms

●Server Backend Latencies 310 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 490 ms

○INP breakdown

○Avoid non-composited animations

○Avoid large layout shifts

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.

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
Best Seller badge. This item is a top seller in its category `article.bg-button-transparent > div.relative > div.absolute > a.mt-2`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●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.

●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

●Elements with the `role=text` attribute do not have focusable descendents.

●Background and foreground colors have a sufficient contrast ratio

●`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

●Definition list items are wrapped in `<dl>` elements

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

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

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

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

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●`<video>` elements contain a `<track>` element with `[kind="captions"]`

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[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 an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○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

○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

○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

○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

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 / Warning	Source
Unload event listeners are deprecated and will be removed.	www.zappos.com/ line 26, col 249
AttributionReporting	connect.facebook.net/en_US/fbevents.js line 279, col 769

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
c.tagdelivery.com/c.gif?from=uet&rn=151078	`Failed to load resource: net::ERR_NAME_NOT_RESOLVED`
www.zappos.com/marty-assets/microsoft-uet-tag-zappos.html	`SyntaxError: "[object Object]" is not valid JSON at JSON.parse (<anonymous>) at https://www.zappos.com/marty-assets/microsoft-uet-tag-zappos.html:13:28`

●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

●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 DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

100

SEO

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

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`