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Lighthouse Desktop

· 0 checks — Desktop 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.

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
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
www.omicsonline.org/assets/css/styles.css86400.0 s84.9 KiB
/signals/config/297919997051754?v=2.9.303&r=stable&domain...1200.0 s23.8 KiB
/pagead/managed/js/adsense/m202604170101/show_ads_impl_fy...1209600.0 s177.5 KiB
www.omicsonline.org/images/banner_bg.jpg86400.0 s29.0 KiB
www.omicsonline.org/images/flags.png86400.0 s27.9 KiB
www.omicsonline.org/assets/css/global.css86400.0 s25.9 KiB
www.omicsonline.org/assets/css/omicsonline.org.css86400.0 s24.9 KiB
www.omicsonline.org/images/img_tetimonial_6.png86400.0 s20.2 KiB
www.omicsonline.org/images/img_tetimonial_4.png86400.0 s19.3 KiB
www.omicsonline.org/images/slider_mobile.png86400.0 s18.2 KiB
www.omicsonline.org/images/img_tetimonial_7.png86400.0 s17.9 KiB
www.omicsonline.org/images/img_tetimonial_5.png86400.0 s17.3 KiB
www.omicsonline.org/images/img_tetimonial_8.png86400.0 s14.8 KiB
www.omicsonline.org/assets/slick/slick.min.js86400.0 s11.7 KiB
/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...2871.0 s4.4 KiB
www.omicsonline.org/images/icon_Scientific-Alliance.png86400.0 s6.5 KiB
www.omicsonline.org/images/icon_ys_award.png86400.0 s6.2 KiB
www.omicsonline.org/images/icon_scholar.png86400.0 s5.5 KiB
www.omicsonline.org/images/icon_open_access_journals.png86400.0 s5.1 KiB
www.omicsonline.org/images/icon_sc_alliances.png86400.0 s5.0 KiB
www.omicsonline.org/assets/slick/ajax-loader.gif86400.0 s4.5 KiB
www.omicsonline.org/assets/mCustomScrollbar/jquery.mCustomScrollbar.min.css86400.0 s4.4 KiB
www.omicsonline.org/images/icon_Scientific-Conferences.png86400.0 s4.3 KiB
www.omicsonline.org/images/clmj_container_bg.png86400.0 s4.2 KiB
www.omicsonline.org/imges/flags/russia.png86400.0 s4.0 KiB
www.omicsonline.org/assets/js/jquery.matchHeight.js86400.0 s3.7 KiB
www.omicsonline.org/images/wraper_bg.png86400.0 s3.5 KiB
www.omicsonline.org/css/bootstrap-social.css86400.0 s2.9 KiB
www.omicsonline.org/js/jquery.coolautosuggest.js86400.0 s2.4 KiB
www.omicsonline.org/js/jquery.bootpag.min.js86400.0 s1.8 KiB
www.omicsonline.org/assets/js/scroll-to-top.js86400.0 s1.6 KiB
www.omicsonline.org/imges/flags/portugal.png86400.0 s1.4 KiB
www.omicsonline.org/assets/slick/slick-theme.css86400.0 s1.3 KiB
www.omicsonline.org/assets/css/author.css86400.0 s1.3 KiB
www.omicsonline.org/images/innerpage_bg.jpg86400.0 s1.3 KiB
www.omicsonline.org/js/grids.min.js86400.0 s1.2 KiB
www.omicsonline.org/imges/flags/spain.png86400.0 s1.1 KiB
www.omicsonline.org/assets/slick/slick.css86400.0 s1.0 KiB
www.omicsonline.org/assets/img/cd-top-arrow.svg86400.0 s900 B
www.omicsonline.org/css/main-coolautosuggest.css86400.0 s884 B
www.omicsonline.org/imges/flags/japan.png86400.0 s883 B
www.omicsonline.org/imges/flags/china.png86400.0 s875 B
www.omicsonline.org/js/jquery.coolfieldset.js86400.0 s859 B
www.omicsonline.org/imges/flags/india.png86400.0 s817 B
www.omicsonline.org/imges/flags/germany.png86400.0 s672 B
www.omicsonline.org/imges/flags/france.png86400.0 s671 B
www.omicsonline.org/images/header_bg_pattern.png86400.0 s630 B
/tr/?id=297919997051754&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 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:16.667 source:map[column:29670 line:2 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.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:14.58 source:map[type:text value:[unattributed]]] map[reflowTime:9.192 source:map[column:51393 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]] map[reflowTime:2.702 source:map[column:50673 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]] map[reflowTime:0.17 source:map[column:50731 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]] map[reflowTime:0.145 source:map[column:50793 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]] map[reflowTime:2.402 source:map[column:51415 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]] map[reflowTime:0.274 source:map[column:84717 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]] map[reflowTime:1.782 source:map[column:79076 line:1 type:source-location url:https://code.jquery.com/jquery-3.3.1.min.js urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:2819.675 label:Time to first byte subpart:timeToFirstByte] map[duration:153.203 label:Resource load delay subpart:resourceLoadDelay] map[duration:27.854 label:Resource load duration subpart:resourceLoadDuration] map[duration:123.724 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-SECTION
nodeLabel:   Make the best use of Scientific Research and information from our 700+ leadi…
path: 1,HTML,1,BODY,6,SECTION
selector: body > section.banner_area
snippet: <section class="banner_area">

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-SECTION
nodeLabel:   Make the best use of Scientific Research and information from our 700+ leadi…
path: 1,HTML,1,BODY,6,SECTION
selector: body > section.banner_area
snippet: <section class="banner_area">

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

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
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_6.png19.8 KiB18.3 KiB
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_4.png18.9 KiB17.4 KiB
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_7.png17.5 KiB16.0 KiB
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_5.png16.8 KiB15.4 KiB
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_8.png14.3 KiB12.8 KiB
Omicsonline | slider_mobile div.container > div.row > div.col-12 > img.img-responsive
www.omicsonline.org/images/slider_mobile.png17.7 KiB7.7 KiB
Omicsonline | Young Scientist Awards div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_ys_award.png5.8 KiB4.3 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: 1.3 s
URLTime Spent
omicsonline.org/1.3 s
www.omicsonline.org/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: 1.6 s
URLTime Spent
www.omicsonline.org/1.7 s

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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 8.6 KiB

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: 110 ms 140.0 KiB
URLTransfer SizeEst Savings
www.omicsonline.org/assets/css/styles.css84.4 KiB78.7 KiB
www.omicsonline.org/assets/css/global.css25.4 KiB24.6 KiB
www.omicsonline.org/assets/css/omicsonline.org.css24.4 KiB22.6 KiB
.fc-consent-root .fc-dialog-container.fc-fullscreen { height: 100% !important; … } …16.3 KiB14.1 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.

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
Omicsonline | slider_mobile div.container > div.row > div.col-12 > img.img-responsive
www.omicsonline.org/images/slider_mobile.png
Omicsonline | Open Access Journals div.col-12 > div.card > div.card-body > img.img-fluid
www.omicsonline.org/images/icon_open_access_journals.png
Omicsonline | Scientific Conferences div.col-12 > div.card > div.card-body > img.img-fluid
www.omicsonline.org/images/icon_Scientific-Conferences.png
Omicsonline | Scientific Alliance div.col-12 > div.card > div.card-body > img.img-fluid
www.omicsonline.org/images/icon_Scientific-Alliance.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_7.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_4.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_8.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_5.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_6.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_7.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_4.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_8.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_5.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_6.png
Omicsonline | József Vas Pal div.slick-track > div.row > div.col-12 > img.img-fluid
www.omicsonline.org/images/img_tetimonial_7.png
Omicsonline | Scholars Central div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_scholar.png
Omicsonline | Young Scientist Awards div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_ys_award.png
Omicsonline | Scientific Alliances div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_sc_alliances.png
Omicsonline | Scholars Central div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_scholar.png
Omicsonline | Young Scientist Awards div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_ys_award.png
Omicsonline | Scientific Alliances div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_sc_alliances.png
Omicsonline | Scholars Central div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_scholar.png
Omicsonline | Young Scientist Awards div.slick-list > div.slick-track > a.nav-link > img.img-fluid
www.omicsonline.org/images/icon_ys_award.png

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

●Layout shift culprits
●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 50 ms
●Minify JavaScript
●Avoids enormous network payloads Total size was 1,558 KiB
●User Timing marks and measures 5 user timings
●JavaScript execution time 0.2 s
●Minimizes main-thread work 0.8 s
●Avoid non-composited animations 6 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 1,050 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid large layout shifts 3 layout shifts found
○INP breakdown
○Avoid long main-thread tasks
91

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
Language div.container > div.row > div.nav-item > a#multi_lang
Read More div.col-12 > div.card > div.card-body > a.btn
Read More div.col-12 > div.card > div.card-body > a.btn
Read More div.col-12 > div.card > div.card-body > a.btn
Article Processing Charges div.row > div.col-12 > nav.nav > a.nav-item
Journal Impact Factor div.row > div.col-12 > nav.nav > a.nav-item
Peer Review Process div.row > div.col-12 > nav.nav > a.nav-item
Journals by Subject div.row > div.col-12 > div.card > h6.card-header
Clinical & Medical Journals div.row > div.col-12 > div.card > h6.card-header
Conferences By Continents div.row > div.col-12 > div.card > h6.card-header
Continents div.col-12 > div.card > h6.card-header > strong
Medical & Clinical Conferences div.row > div.col-12 > div.card > h6.card-header
Medical & Clinical div.col-12 > div.card > h6.card-header > strong
Conferences by Subject div.row > div.col-12 > div.card > h6.card-header
Subject div.col-12 > div.card > h6.card-header > strong
Latest Research Reports div.row > div.col-12 > div.card > h6.card-header
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Journal of Materials Science and Nanomaterials div.media-body > div.row > div.col-12 > a.badge
Quick links div.row > div.col-12 > div.card > h6.card-header
Learn more div.fc-dialog-content > div.fc-dialog-scrollable-content > button.fc-faq-header > span.fc-faq-label
List of partners. div.fc-dialog-scrollable-content > div.fc-footer > p > a.fc-vendors-list-dialog

These are opportunities to improve the legibility of your content.

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
Journals by Subject div.row > div.col-12 > div.card > h6.card-header

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
Business & Management div.col-md-6 > ul.list-inline > li > a
Chemical Engineering div.col-md-6 > ul.list-inline > li > a
Clinical Sciences div.col-md-6 > ul.list-inline > li > a
Computer Science div.col-md-6 > ul.list-inline > li > a
Food & Nutrition div.col-md-6 > ul.list-inline > li > a
General Science div.col-md-6 > ul.list-inline > li > a
Medical Sciences div.col-md-6 > ul.list-inline > li > a
Nanotechnology div.col-md-6 > ul.list-inline > li > a
Nursing & Health Care div.col-md-6 > ul.list-inline > li > a
Pharmaceutical Sciences div.col-md-6 > ul.list-inline > li > a
Haematology div.col-md-6 > ul.list-inline > li > a
Healthcare div.col-md-6 > ul.list-inline > li > a
Immunology div.col-md-6 > ul.list-inline > li > a
Neurology div.col-md-6 > ul.list-inline > li > a
Nursing div.col-md-6 > ul.list-inline > li > a
Nutrition div.col-md-6 > ul.list-inline > li > a
Oncology div.col-md-6 > ul.list-inline > li > a
Ophthalmology div.col-md-6 > ul.list-inline > li > a
Orthopaedics div.col-md-6 > ul.list-inline > li > a
Pathology div.col-md-6 > ul.list-inline > li > a
Pediatrics div.col-md-6 > ul.list-inline > li > a
Psychiatry div.col-md-6 > ul.list-inline > li > a
Pulmonology div.col-md-6 > ul.list-inline > li > a
Surgery div.col-md-6 > ul.list-inline > li > a
Toxicology div.col-md-6 > ul.list-inline > li > a
Previous div.card > div.card-footer > nav.nav > button.slick-prev
Next div.card > div.card-footer > nav.nav > button.slick-next

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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[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 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
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●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
○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.
○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

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
AttributionReporting

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
Failed to load resource: net::ERR_NAME_NOT_RESOLVED
●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
●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
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
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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.

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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