C — https://elixir-lang.org | BeaverCheck Audit

Site Health

Score: 78 / 100

Based on 8 categories, 0 sections

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

Top Priorities (5)

Content-Security-Policy header is missing

Security › Security Headers

HSTS header is missing

Security › Security Headers

No Content-Security-Policy header found

Security › Content Security Policy

No <main> landmark found

Accessibility › Landmark Structure

No H1 heading found

Accessibility › Heading Hierarchy

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Felixir-lang.org)](https://beavercheck.com/results/a850ec11-ed17-438f-91f7-7ebcc57a45d2)

HTML

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

100

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.54 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.69 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.052

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.54 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.69 s

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.

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

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

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.

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.

URL	Transfer Size	Duration
elixir-lang.org/css/style.css	5.9 KiB
elixir-lang.org/js/icons/style.css	729 B	151 ms
elixir-lang.org/css/syntax.css	985 B
elixir-lang.org/js/icons/ie7/ie7.css	356 B
fonts.googleapis.com/css?family=Bitter:400,700	1.0 KiB	776 ms

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Request	Cache TTL	Transfer Size
elixir-lang.org/images/cases/logos/cyanview.png	600.0 s	52.2 KiB
elixir-lang.org/images/logo/logo.png	600.0 s	34.4 KiB
elixir-lang.org/images/cases/logos/remote.png	600.0 s	29.9 KiB
elixir-lang.org/images/cases/logos/duffel.png	600.0 s	15.6 KiB
elixir-lang.org/images/learning/mini-docu.png	600.0 s	6.0 KiB
elixir-lang.org/css/style.css	600.0 s	5.9 KiB
elixir-lang.org/images/logo/eef.png	600.0 s	2.1 KiB
elixir-lang.org/js/index.js	600.0 s	2.0 KiB
elixir-lang.org/images/cases/logos/veeps.svg	600.0 s	993 B
elixir-lang.org/css/syntax.css	600.0 s	985 B
elixir-lang.org/js/icons/style.css	600.0 s	729 B
elixir-lang.org/js/icons/ie7/ie7.css	600.0 s	356 B

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.

URL	Est Savings
fonts.gstatic.com/s/bitter/v40/rax8HiqOu8IVPmn7f4xpLjpSmw.woff2	5.0 ms

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

	URL	Resource Size	Est Savings
Elixir Logo `div#header > div#branding > a#site-title > img.logo`	elixir-lang.org/images/logo/logo.png	34.1 KiB	23.6 KiB
div.hentry > div#shuffled-cases > a.cases-box > div.cases-image `div.hentry > div#shuffled-cases > a.cases-box > div.cases-image`	elixir-lang.org/images/cases/logos/duffel.png	15.5 KiB	10.2 KiB
Watch the Elixir mini-documentary! `div#sidebar-primary > div#mini-docu > a > div.mini-docu-cta`	elixir-lang.org/images/learning/mini-docu.png	5.7 KiB	5.1 KiB

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

Diagnostics

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

Estimated savings: 0.0 ms 20.3 KiB

URL	Transfer Size	Est Savings
ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js	32.7 KiB	20.3 KiB

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

	URL
Elixir Logo `div#header > div#branding > a#site-title > img.logo`	elixir-lang.org/images/logo/logo.png
Join the Erlang Ecosystem Foundation `div#sidebar-primary > div#eef > a > img`	elixir-lang.org/images/logo/eef.png

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

●Time to Interactive 2.7 s

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 20 ms

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 231 KiB

●JavaScript execution time 0.2 s

●Minimizes main-thread work 0.8 s

●Avoid long main-thread tasks 3 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 110 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 10 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid non-composited animations

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.

Failing Elements
#api `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#integration `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#xml `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#growth `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#team `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#web `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#streaming `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#scaling `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#web `div#shuffled-cases > a.cases-box > div.cases-tag > span`
# Spawn an Elixir process (not an operating system one!) `figure.highlight > pre > code.language-elixir > span.c1`
# Block until the message is received `figure.highlight > pre > code.language-elixir > span.c1`
4040 `figure.highlight > pre > code.language-elixir > span.mi`
16 `figure.highlight > pre > code.language-elixir > span.mi`
# Code that drives a car `figure.highlight > pre > code.language-elixir > span.c1`
#=> Fails if the user is under 16 `figure.highlight > pre > code.language-elixir > span.c1`
1 test, 0 failures `div.entry-summary > pre > code > span`
192 `figure.highlight > pre > code.language-elixir > span.mi`
223 `figure.highlight > pre > code.language-elixir > span.mi`
75 `figure.highlight > pre > code.language-elixir > span.mi`
115 `figure.highlight > pre > code.language-elixir > span.mi`

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.

Failing Elements
html `html`

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

●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

●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

●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-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

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

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

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

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○Buttons have an accessible name

○The page contains a heading, skip link, or landmark region

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

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

○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.

○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.

100

Best Practices

●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 browser errors logged to the console

●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

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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

663 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

752 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

663 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

752 ms

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.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Request	Cache TTL	Transfer Size
elixir-lang.org/images/cases/logos/cyanview.png	600.0 s	52.1 KiB
elixir-lang.org/images/logo/logo.png	600.0 s	34.3 KiB
elixir-lang.org/images/cases/logos/remote.png	600.0 s	30.0 KiB
elixir-lang.org/images/cases/logos/discord.png	600.0 s	16.3 KiB
elixir-lang.org/images/cases/logos/community.png	600.0 s	12.7 KiB
elixir-lang.org/images/cases/logos/met-france.svg	600.0 s	6.0 KiB
elixir-lang.org/images/learning/mini-docu.png	600.0 s	5.9 KiB
elixir-lang.org/css/style.css	600.0 s	5.8 KiB
elixir-lang.org/images/logo/eef.png	600.0 s	2.1 KiB
elixir-lang.org/js/index.js	600.0 s	2.0 KiB
elixir-lang.org/images/cases/logos/veeps.svg	600.0 s	1.0 KiB
elixir-lang.org/css/syntax.css	600.0 s	940 B
elixir-lang.org/js/icons/style.css	600.0 s	781 B
elixir-lang.org/js/icons/ie7/ie7.css	600.0 s	356 B

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

	URL	Resource Size	Est Savings
Elixir Logo `div#header > div#branding > a#site-title > img.logo`	elixir-lang.org/images/logo/logo.png	34.1 KiB	30.7 KiB
Watch the Elixir mini-documentary! `div#sidebar-primary > div#mini-docu > a > div.mini-docu-cta`	elixir-lang.org/images/learning/mini-docu.png	5.7 KiB	5.1 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.

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

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.

URL	Transfer Size	Duration
fonts.googleapis.com/css?family=Bitter:400,700	1.0 KiB	209 ms
elixir-lang.org/js/icons/ie7/ie7.css	356 B
elixir-lang.org/js/icons/style.css	781 B
elixir-lang.org/css/syntax.css	940 B
elixir-lang.org/css/style.css	5.8 KiB

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.

URL	Est Savings
fonts.gstatic.com/s/bitter/v40/rax8HiqOu8IVPmn7f4xpLjpSmw.woff2	10 ms

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

Diagnostics

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

Estimated savings: 40 ms 20.3 KiB

URL	Transfer Size	Est Savings
ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js	32.7 KiB	20.3 KiB

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

	URL
Elixir Logo `div#header > div#branding > a#site-title > img.logo`	elixir-lang.org/images/logo/logo.png
Join the Erlang Ecosystem Foundation `div#sidebar-primary > div#eef > a > img`	elixir-lang.org/images/logo/eef.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

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Time to Interactive 0.8 s

●Max Potential First Input Delay 20 ms

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 251 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.3 s

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 20 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 0 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

Accessibility

Contrast

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

Failing Elements
#real-time `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#genstage `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#otp `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#open-data `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#gov `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#phoenix `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#messaging `div#shuffled-cases > a.cases-box > div.cases-tag > span`
#broadway `div#shuffled-cases > a.cases-box > div.cases-tag > span`
# Spawn an Elixir process (not an operating system one!) `figure.highlight > pre > code.language-elixir > span.c1`
# Block until the message is received `figure.highlight > pre > code.language-elixir > span.c1`
4040 `figure.highlight > pre > code.language-elixir > span.mi`
16 `figure.highlight > pre > code.language-elixir > span.mi`
# Code that drives a car `figure.highlight > pre > code.language-elixir > span.c1`
#=> Fails if the user is under 16 `figure.highlight > pre > code.language-elixir > span.c1`
1 test, 0 failures `div.entry-summary > pre > code > span`
192 `figure.highlight > pre > code.language-elixir > span.mi`
223 `figure.highlight > pre > code.language-elixir > span.mi`
75 `figure.highlight > pre > code.language-elixir > span.mi`
115 `figure.highlight > pre > code.language-elixir > span.mi`

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.

Failing Elements
html `html`

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

●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

●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

●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-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

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

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

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

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○Buttons have an accessible name

○The page contains a heading, skip link, or landmark region

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

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

○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.

○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.

100

Best Practices

●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 browser errors logged to the console

●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

100

SEO

○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`

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Lighthouse Scores

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Best practices

Best Practices

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Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Contrast

Best practices

Best Practices

SEO

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