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
jestjs.io/img/content/feature-fast.png	14400.0 s	308.2 KiB
jestjs.io/img/content/feature-coverage.png	14400.0 s	203.5 KiB
jestjs.io/img/content/matchers/toBe.png	14400.0 s	188.5 KiB
jestjs.io/img/content/feature-mocking.png	14400.0 s	188.3 KiB
jestjs.io/assets/js/main.17432a57.js	14400.0 s	140.7 KiB
jestjs.io/img/logos/instagram.png	14400.0 s	55.4 KiB
jestjs.io/img/logos/spotify.png	14400.0 s	39.0 KiB
jestjs.io/assets/js/8155.4644b154.js	14400.0 s	33.0 KiB
jestjs.io/img/logos/airbnb.png	14400.0 s	32.0 KiB
jestjs.io/assets/css/styles.a07fbb26.css	14400.0 s	27.7 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
jestjs.io/img/logos/nyt.png	14400.0 s	10.7 KiB
i.ytimg.com/vi/cAKYQpTC7MA/hqdefault.jpg	7200.0 s	7.8 KiB
images.opencollective.com/datadog/5301801/logo.png	86400.0 s	13.8 KiB
jestjs.io/assets/js/1646.9c736360.js	14400.0 s	7.5 KiB
jestjs.io/assets/js/c4f5d8e4.f64f7276.js	14400.0 s	6.2 KiB
jestjs.io/assets/js/runtime~main.ffe131c7.js	14400.0 s	5.6 KiB
images.opencollective.com/airbnb/d327d66/logo.png	86400.0 s	7.9 KiB
jestjs.io/img/logos/facebook.png	14400.0 s	4.1 KiB
images.opencollective.com/principal/431e690/logo.png	86400.0 s	6.3 KiB
jestjs.io/img/openjs_foundation-logo-horizontal-color-dark_background.svg	14400.0 s	2.5 KiB
jestjs.io/assets/js/3048.004dfdb5.js	14400.0 s	2.3 KiB
jestjs.io/img/logos/twitter.png	14400.0 s	1.8 KiB
jestjs.io/img/logos/thordata.svg	14400.0 s	1.4 KiB
jestjs.io/assets/js/a7456010.2a75c070.js	14400.0 s	316 B

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
jestjs.io/assets/css/styles.a07fbb26.css	27.7 KiB	301 ms

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
Instagram `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/instagram.png	55.2 KiB	52.4 KiB
Spotify `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/spotify.png	38.8 KiB	36.0 KiB
Airbnb `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/airbnb.png	31.8 KiB	30.1 KiB
Datadog's avatar `div.opencollective > div.opencollective-avatars > a.sponsor-item > img.sponsor-avatar`	images.opencollective.com/datadog/5301801/logo.png	13.2 KiB	10.7 KiB
The New York Times `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/nyt.png	10.6 KiB	8.5 KiB
Airbnb's avatar `div.opencollective > div.opencollective-avatars > a.sponsor-item > img.sponsor-avatar`	images.opencollective.com/airbnb/d327d66/logo.png	7.2 KiB	4.6 KiB

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

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 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 17.6 KiB

URL	Transfer Size	Est Savings
jestjs.io/assets/css/styles.a07fbb26.css	27.6 KiB	17.6 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: 300 ms 158.3 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-9V0LCYENMT&cx=c&gtm=4e6411h1	144.3 KiB	62.8 KiB
www.googletagmanager.com/gtag/js?id=UA-44373548-17	123.4 KiB	62.6 KiB
jestjs.io/assets/js/main.17432a57.js	140.6 KiB	33.0 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
jestjs.io/	4.0 s	52 ms	5.2 ms
jestjs.io/assets/js/main.17432a57.js	1.8 s	1.5 s	82 ms
Unattributable	711 ms	114 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=UA-44373548-17	317 ms	238 ms	76 ms
www.googletagmanager.com/gtag/js?id=G-9V0LCYENMT&cx=c&gtm=4e6411h1	310 ms	237 ms	70 ms
www.google-analytics.com/analytics.js	113 ms	95 ms	11 ms
jestjs.io/assets/js/1646.9c736360.js	88 ms	83 ms	3.6 ms
jestjs.io/assets/js/8155.4644b154.js	51 ms	5.6 ms	44 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	2.4 s
Other	1.8 s
Style & Layout	1.5 s
Rendering	1.4 s
Script Parsing & Compilation	302 ms
Parse HTML & CSS	69 ms
Garbage Collection	21 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
Airbnb `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/airbnb.png
Facebook `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/facebook.png
Instagram `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/instagram.png
The New York Times `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/nyt.png
Spotify `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/spotify.png
OpenJS Foundation Logo `div.footer__bottom > div.margin-bottom--sm > a.footerLogoLink_tutC > img.footer__logo`	jestjs.io/img/openjs_foundation-logo-horizontal-color-dark_background.svg
Twitter `div.blockContent > div.gridBlockV1 > a.logo-item > img`	jestjs.io/img/logos/twitter.png

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,671 KiB

●User Timing marks and measures 5 user timings

●Avoid long main-thread tasks 14 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 10 ms

●Server Backend Latencies 60 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 20 ms

○INP breakdown

○LCP request discovery

○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.

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
JEST `div.navbar__inner > div.theme-layout-navbar-left > a.navbar__brand > b.navbar__title`
JEST `div.jest-card-hitslop > div.jest-card > div.jest-card-front > div.jest-card-label`
JEST `div.jest-card-hitslop > div.jest-card > div.jest-card-front > div.jest-card-label`
zero config `h2 > div > span > p`
snapshots `h2 > div > span > p`
isolated `h2 > div > span > p`
great api `h2 > div > span > p`
FAST AND SAFE `h2 > div > span > p`
CODE COVERAGE `h2 > div > span > p`
--coverage `span > p > a > code`
Mock Functions `div > span > p > a`
GREAT EXCEPTIONS `h2 > div > span > p`
toBeCloseTo `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toEqual `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toStrictEqual `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toHaveProperty `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toMatchSnapshot `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toThrowError `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
PHILOSOPHY `div.wrapperV1 > div.blockElement > div.blockContent > h2`
Jest and Delightful JavaScript Testing `div > span > p > a`
Building High-Quality JavaScript Tools `div > span > p > a`
Jest as a Platform `div > span > p > a`
OPEN COLLECTIVE `div.wrapperV1 > div.yellow > div.blockContent > h2`
gold sponsors `div.yellow > div.blockContent > div.opencollective > h3`
featured sponsors `div.yellow > div.blockContent > div.opencollective > h3`
Join 600+ donors `div.blockContent > div.opencollective > p > a`
opencollective.com `div.blockContent > div.opencollective > p > a`
WHO USES JEST? `div.wrapperV1 > div.yellow > div.blockContent > h2`
100m+ million `div > span > p > a`
15,000,000 `div > span > p > a`
OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
Trademark Policy `div.footer__bottom > div.footer__copyright > p > a`
Trademark List `div.footer__bottom > div.footer__copyright > p > a`
list of OpenJS Foundation trademarks `div.footer__bottom > div.footer__copyright > p > a`
The OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
Terms of Use `div.footer__bottom > div.footer__copyright > p > a`
Privacy Policy `div.footer__bottom > div.footer__copyright > p > a`
Bylaws `div.footer__bottom > div.footer__copyright > p > a`
Code of Conduct `div.footer__bottom > div.footer__copyright > p > a`
Trademark Policy `div.footer__bottom > div.footer__copyright > p > a`
Trademark List `div.footer__bottom > div.footer__copyright > p > a`
Cookie Policy `div.footer__bottom > div.footer__copyright > p > a`

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
OpenJS Foundation `div.footer__bottom > div.footer__copyright > p > a`
Trademark Policy `div.footer__bottom > div.footer__copyright > p > a`
Trademark List `div.footer__bottom > div.footer__copyright > p > a`
list of OpenJS Foundation trademarks `div.footer__bottom > div.footer__copyright > p > a`

These are opportunities to improve the legibility of your content.

Best practices

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.plugin-pages `html.plugin-pages`

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

●`[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

●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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

○`[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

○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

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○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.

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

○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
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #418; visit https://reactjs.org/docs/error-decoder.html?invariant=418 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at ua (https://jestjs.io/assets/js/main.17432a57.js:2:168788) at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241454) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at yc (https://jestjs.io/assets/js/main.17432a57.js:2:228984) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224065) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]
jestjs.io/assets/js/main.17432a57.js line 1, col 18234	Docusaurus React Root onRecoverableError: Error: Minified React error #423; visit https://reactjs.org/docs/error-decoder.html?invariant=423 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at Sl (https://jestjs.io/assets/js/main.17432a57.js:2:241140) at vc (https://jestjs.io/assets/js/main.17432a57.js:2:229012) at bc (https://jestjs.io/assets/js/main.17432a57.js:2:228940) at gc (https://jestjs.io/assets/js/main.17432a57.js:2:228803) at ac (https://jestjs.io/assets/js/main.17432a57.js:2:225638) at oc (https://jestjs.io/assets/js/main.17432a57.js:2:224193) at k (https://jestjs.io/assets/js/main.17432a57.js:2:400372) at MessagePort.P (https://jestjs.io/assets/js/main.17432a57.js:2:400904) [object Object]

●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

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Detected JavaScript libraries

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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
toBe `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toBeCloseTo `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toEqual `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toStrictEqual `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toHaveProperty `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toMatchSnapshot `div.blockElement > div.blockContent > p.buttons-wrapper > a.button`
toThrowError `div.blockElement > div.blockContent > p.buttons-wrapper > a.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

●Page has successful HTTP status code

●Links have descriptive text

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid