C — https://www.codepen.io | BeaverCheck Audit

Site Health

Score: 70 / 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

No Content-Security-Policy header found

Security › Content Security Policy

No favicon or icon links detected

Accessibility › Favicon & Branding

Cross-Origin-Embedder-Policy header is missing

Security › Security Headers

Cross-Origin-Opener-Policy header is missing

Security › Security Headers

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[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.codepen.io)](https://beavercheck.com/results/f1895171-8f52-522b-8718-d5f826b30f72)

HTML

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

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.

9.71 s

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

11.91 s

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

986 ms

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

0.007

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

9.71 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.

11.99 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.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

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/telefon-black.654a55c7fc5c69899e4c776e9440cb.woff2	45 ms
public.codepenassets.com/fonts/telefon-bold.30e9132f184f36be19ce6e4b9024ab.woff2	25 ms

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

lhId: page-0-IMG

nodeLabel: main#main > header.HomepageAnonHeader_root-FJ8v9 > div.width-wrapper > img.HomepageAnonHeader_bg-btg1n

path: 1,HTML,1,BODY,0,DIV,0,DIV,2,MAIN,0,HEADER,1,DIV,2,IMG

selector: main#main > header.HomepageAnonHeader_root-FJ8v9 > div.width-wrapper > img.HomepageAnonHeader_bg-btg1n

snippet: <img alt="" class="HomepageAnonHeader_bg-btg1n" src="https://cpwebassets.codepen.io/assets/packs/lines-2-4e66616a5ef291c3566a7d…">

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

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

Request	Cache TTL	Transfer Size
/6354724/internal/screenshots/pens/emdjyjX.custom.jpeg?ve...	259200.0 s	83.2 KiB
/uu/7/173968/1774279954-CodePen_Monthly_Sponser_BTF_-_600...	0.0 ms	11.9 KiB
cdn.carbonads.com/carbon.js?serve=CK7IVK7U&placement=codepenio	0.0 ms	10.5 KiB
codepen.io/cdn-cgi/challenge-platform/h/b/scripts/jsd/625261456364/main.js?	14400.0 s	12.4 KiB
static4.buysellads.net/uu/7/173968/1774279581-MongoDB_White_250x100.png	0.0 ms	4.3 KiB
srv.carbonads.net/static/30242/d7610a9f0532051a42d318bba816ca12dbeb62ed	604800.0 s	24.9 KiB
srv.buysellads.com/ads/CEAICKQN.json?callback=customJSONPCallback	0.0 ms	822 B
/6354724/internal/avatars/users/default.png?fit=crop&form...	259200.0 s	2.6 KiB
/1715430/internal/avatars/users/default.png?fit=crop&form...	259200.0 s	2.5 KiB
/6291/internal/avatars/users/default.png?fit=crop&format=...	259200.0 s	2.2 KiB
/7015343/internal/avatars/users/default.png?fit=crop&form...	259200.0 s	1.3 KiB

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
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`	/assets/packs/editor-privacy-e542bc22ce324502eb727577083e...	97.8 KiB	90.2 KiB
Artemis 2 Integrity - scroll to reach the moon `div.ItemPreviewScreenshot-module_root-nlh2u > div > picture > img.ItemPreviewImage-module_root-0gttw`	/6354724/internal/screenshots/pens/emdjyjX.custom.jpeg?ve...	82.7 KiB	74.6 KiB
Astronaut landed to Moon (Mission Artemis II) `div.ItemPreviewScreenshot-module_root-nlh2u > div > picture > img.ItemPreviewImage-module_root-0gttw`	shots.codepen.io/username/pen/JoRBNoK-800.webp?version=1775471477	25.8 KiB	19.6 KiB
div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img `div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img`	/uu/7/173968/1774279954-CodePen_Monthly_Sponser_BTF_-_600...	11.6 KiB	9.5 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.

Estimated savings: 803 ms

URL	Time Spent
www.codepen.io/	803 ms
codepen.io/	0.0 ms

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.

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.

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.

Estimated savings: 170 ms 60.1 KiB

URL	Transfer Size	Est Savings
cpwebassets.codepen.io/assets/packs/css/6-97a9fa2f.chunk.css	52.6 KiB	47.9 KiB
/assets/global/global-271c3cfc3864b9cbd4e2fc4b749b359f7c5...	15.4 KiB	12.2 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.

Estimated savings: 3.3 s 641.5 KiB

URL	Transfer Size	Est Savings
cpwebassets.codepen.io/assets/packs/js/vendor-9a4e874746c7ba6cb4f7.chunk.js	659.6 KiB	423.7 KiB
cpwebassets.codepen.io/assets/packs/js/6-71433d627ed09ffe0e50.chunk.js	333.3 KiB	217.8 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.

URL	Total CPU Time	Script Evaluation	Script Parse
cpwebassets.codepen.io/assets/packs/js/vendor-9a4e874746c7ba6cb4f7.chunk.js	1.2 s	798 ms	264 ms
codepen.io/	1.0 s	29 ms	1.1 ms
cpwebassets.codepen.io/assets/packs/js/everypage-4eb662cbcfa735a99fa7.js	648 ms	637 ms	9.4 ms
Unattributable	618 ms	19 ms	0.0 ms
codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js	349 ms	325 ms	3.3 ms
cpwebassets.codepen.io/assets/packs/js/6-71433d627ed09ffe0e50.chunk.js	186 ms	0.8 ms	185 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

Category	Time Spent
Script Evaluation	1.8 s
Other	979 ms
Style & Layout	538 ms
Script Parsing & Compilation	470 ms
Rendering	98 ms
Garbage Collection	88 ms
Parse HTML & CSS	33 ms

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

Estimated savings: 0.0 ms 3.3 KiB

URL	Transfer Size	Est Savings
/assets/global/global-271c3cfc3864b9cbd4e2fc4b749b359f7c5...	15.6 KiB	3.3 KiB

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

	URL
Screenshot of the Pen Editor with Pen Settings dialog open. `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuSupport-DBU6h > img`	/assets/packs/editor-support-9cc33b6268c0a6c897033028084e...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`	/assets/packs/editor-privacy-e542bc22ce324502eb727577083e...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuAssets-cKHgk > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuAssets-cKHgk > img`	/assets/packs/editor-assets-6a081a7c8ff72da526846f3c8f8ae...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuEmbeds-7y6hn > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuEmbeds-7y6hn > img`	/assets/packs/editor-embed-eae2ee445ef0f63ee8fc7f175858e9...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuProjects-I9r5j > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuProjects-I9r5j > img`	/assets/packs/editor-projects-a0d6a9e16cf1c2c46219ef3d493...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuCollab-1Ao7v > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuCollab-1Ao7v > img`	/assets/packs/editor-collab-90815f9b83fcbdbd3ef7df4573ed9...
div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img `div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img`	/uu/7/173968/1774279954-CodePen_Monthly_Sponser_BTF_-_600...
Salesfoce `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	/assets/packs/salesforce-63204abcda6bd196c6a6da3bb4911510...
Microsoft `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	/assets/packs/microsoft-0859118499110df3a66f00a999a53a40.png
Icon of conveyer belt with boxes on it. `div.width-wrapper > div.HomepageAnonCards_item-baxkw > div.HomepageAnonCards_icon-AFa+u > img`	/assets/packs/icon-build-0f21c66ed03bfb36c597636d27ca621e...
div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_mainSponsorBlockLink-pmIOu > div.HomepageAnonTopAd_image-nLPl7 > img `div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_mainSponsorBlockLink-pmIOu > div.HomepageAnonTopAd_image-nLPl7 > img`	static4.buysellads.net/uu/7/173968/1774279581-MongoDB_White_250x100.png
IBM `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/ibm-c6d225a3817a57e66f67fdcb18d1fe04.png
Adobe `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/adobe-0d9fee1af16f2db73270e52fbdcf4fe8.png
Icon of Map `div.width-wrapper > div.HomepageAnonCards_item-baxkw > div.HomepageAnonCards_icon-AFa+u > img`	/assets/packs/icon-learn-b1311620e99cea826f259aa2f7750940...
Airbnb `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/airbnb-cb44d3434e60956b120c2cfd2afa9a23.png
Square `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/square-e4a6fa8c30a53180c593a11aeb1618c2.png
Grubhub `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/grubhub-f05150a98afe6175f221f4bc75ac3372.png
Icon of Globe `div.width-wrapper > div.HomepageAnonCards_item-baxkw > div.HomepageAnonCards_icon-AFa+u > img`	/assets/packs/icon-share-910c683bbac21bf41fcf9aab64ebc957...
Netflix `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/netflix-8b4f0b76ad5ccaa1b6326267be6c396f.png
Lyft `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/lyft-87acc577a28f7c5fbafbed09b543dd91.png

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

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify JavaScript

●Avoids enormous network payloads Total size was 2,622 KiB

●Avoid long main-thread tasks 9 long tasks found

●Avoid non-composited animations 5 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 170 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

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

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○User Timing marks and measures

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
MongoDB Flexible. Scalable. AI-ready. Build Apps anywhere with MongoDB Atlas. `div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_mainSponsorBlockLink-pmIOu > div > div.HomepageAnonTopAd_adMessage-TgODs`
SPONSOR `div.width-wrapper > div.HomepageAnonHeader_copy-gIp7Y > div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_sponsor-ltTh-`

These are opportunities to improve the legibility of your content.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Failing Elements
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

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.

Failing Elements
SPONSOR `div.width-wrapper > div.HomepageAnonHeader_copy-gIp7Y > div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_sponsor-ltTh-`
About `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Pricing `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Blog `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Podcast `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Documentation `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Support `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Advertise `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-codepen-links > a`
Teams `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-for-links > a`
Privacy `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-for-links > a`
Embeds `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-for-links > a`
Asset Hosting `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-for-links > a`
YouTube `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-social-links > a`
Bluesky `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-social-links > a`
Instagram `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-social-links > a`
Mastodon `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-social-links > a`
Spark `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-community-links > a`
Challenges `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-community-links > a`
Topics `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-community-links > a`
Code of Conduct `footer#link-footer > div#link-footer-width-wrapper > nav#link-footer-community-links > a`

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>`

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

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

●Buttons have an accessible name

●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

●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.

●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

○Deprecated ARIA roles were not used

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

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

○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

○`[role]` values are valid

○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

○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.

○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.

Deprecation / Warning	Source
SharedStorage	codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

URL
cpwebassets.codepen.io/assets/packs/js/vendor-9a4e874746c7ba6cb4f7.chunk.js
cpwebassets.codepen.io/assets/packs/js/6-71433d627ed09ffe0e50.chunk.js

●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 browser errors logged to the console

●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

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

○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

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Failing Elements
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`

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 have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

Best Practices

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.

1.75 s

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

1.99 s

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

81 ms

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

0.055

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

1.84 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.

3.99 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.

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

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

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/telefon-black.654a55c7fc5c69899e4c776e9440cb.woff2	40 ms
public.codepenassets.com/fonts/telefon-bold.30e9132f184f36be19ce6e4b9024ab.woff2	25 ms

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

lhId: page-0-IMG

nodeLabel: main#main > header.HomepageAnonHeader_root-FJ8v9 > div.width-wrapper > img.HomepageAnonHeader_bg-btg1n

path: 1,HTML,1,BODY,0,DIV,0,DIV,2,MAIN,0,HEADER,1,DIV,2,IMG

selector: main#main > header.HomepageAnonHeader_root-FJ8v9 > div.width-wrapper > img.HomepageAnonHeader_bg-btg1n

snippet: <img alt="" class="HomepageAnonHeader_bg-btg1n" src="https://cpwebassets.codepen.io/assets/packs/lines-2-4e66616a5ef291c3566a7d…">

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

value: No additional origins are good candidates for preconnecting

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

Request	Cache TTL	Transfer Size
/mrdoob/three.js/master/examples/textures/planets/earth_a...	300.0 s	501.4 KiB
/6354724/internal/screenshots/pens/emdjyjX.custom.jpeg?ve...	259200.0 s	83.3 KiB
/uu/7/173968/1774279954-CodePen_Monthly_Sponser_BTF_-_600...	0.0 ms	11.9 KiB
cdn.carbonads.com/carbon.js?serve=CK7IVK7U&placement=codepenio	0.0 ms	10.5 KiB
codepen.io/cdn-cgi/challenge-platform/h/b/scripts/jsd/625261456364/main.js?	14400.0 s	12.2 KiB
static4.buysellads.net/uu/7/173968/1774279581-MongoDB_White_250x100.png	0.0 ms	4.3 KiB
srv.carbonads.net/static/30242/f45fb1a7d56ea7c437080c63c6c276383081c21b	604800.0 s	40.4 KiB
cdn.jsdelivr.net/npm/lil-gui@0.18	604800.0 s	8.8 KiB
srv.buysellads.com/ads/CEAICKQN.json?callback=customJSONPCallback	0.0 ms	828 B
/6354724/internal/avatars/users/default.png?fit=crop&form...	259200.0 s	2.6 KiB
/1715430/internal/avatars/users/default.png?fit=crop&form...	259200.0 s	2.5 KiB
/6291/internal/avatars/users/default.png?fit=crop&format=...	259200.0 s	2.2 KiB
/7015343/internal/avatars/users/default.png?fit=crop&form...	259200.0 s	1.3 KiB

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
Artemis 2 Integrity - scroll to reach the moon `div.ItemPreviewScreenshot-module_root-nlh2u > div > picture > img.ItemPreviewImage-module_root-0gttw`	/6354724/internal/screenshots/pens/emdjyjX.custom.jpeg?ve...	82.7 KiB	76.6 KiB
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`	/assets/packs/editor-privacy-e542bc22ce324502eb727577083e...	97.8 KiB	71.0 KiB
ads via Carbon `span > span.carbon-wrap > a.carbon-img > img`	srv.carbonads.net/static/30242/f45fb1a7d56ea7c437080c63c6c276383081c21b	40.2 KiB	38.1 KiB
div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img `div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img`	/uu/7/173968/1774279954-CodePen_Monthly_Sponser_BTF_-_600...	11.6 KiB	9.5 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.

Estimated savings: 251 ms

URL	Time Spent
www.codepen.io/	251 ms
codepen.io/	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.

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.

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.

Estimated savings: 40 ms 60.1 KiB

URL	Transfer Size	Est Savings
cpwebassets.codepen.io/assets/packs/css/6-97a9fa2f.chunk.css	52.6 KiB	47.8 KiB
/assets/global/global-271c3cfc3864b9cbd4e2fc4b749b359f7c5...	15.4 KiB	12.3 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.

Estimated savings: 530 ms 641.2 KiB

URL	Transfer Size	Est Savings
cpwebassets.codepen.io/assets/packs/js/vendor-9a4e874746c7ba6cb4f7.chunk.js	659.6 KiB	423.6 KiB
cpwebassets.codepen.io/assets/packs/js/6-71433d627ed09ffe0e50.chunk.js	333.3 KiB	217.6 KiB

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

Estimated savings: 0.0 ms 3.3 KiB

URL	Transfer Size	Est Savings
/assets/global/global-271c3cfc3864b9cbd4e2fc4b749b359f7c5...	15.6 KiB	3.3 KiB

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

URL	Transfer Size
/sqiqig7tz/tr:orig-true,q-100/sky-2.png?ik-pngq=false&upd...	4.4 MiB
cpwebassets.codepen.io/assets/packs/js/vendor-9a4e874746c7ba6cb4f7.chunk.js	660.2 KiB
/mrdoob/three.js/master/examples/textures/planets/earth_a...	501.4 KiB
cpwebassets.codepen.io/assets/packs/js/6-71433d627ed09ffe0e50.chunk.js	333.6 KiB
/assets/packs/illu-editor-24091b7edc92fba11a2595fe767e6c2...	322.1 KiB
unpkg.com/three@0.183.0/build/three.core.js	274.0 KiB
cdn.jsdelivr.net/npm/three@0.165.0/build/three.module.js	251.8 KiB
/assets/packs/editor-support-9cc33b6268c0a6c897033028084e...	213.6 KiB
/assets/packs/editor-assets-6a081a7c8ff72da526846f3c8f8ae...	173.4 KiB
/assets/packs/editor-embed-eae2ee445ef0f63ee8fc7f175858e9...	130.9 KiB

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

	URL
Screenshot of the Pen Editor with Pen Settings dialog open. `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuSupport-DBU6h > img`	/assets/packs/editor-support-9cc33b6268c0a6c897033028084e...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`	/assets/packs/editor-privacy-e542bc22ce324502eb727577083e...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuAssets-cKHgk > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuAssets-cKHgk > img`	/assets/packs/editor-assets-6a081a7c8ff72da526846f3c8f8ae...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuEmbeds-7y6hn > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuEmbeds-7y6hn > img`	/assets/packs/editor-embed-eae2ee445ef0f63ee8fc7f175858e9...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuProjects-I9r5j > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuProjects-I9r5j > img`	/assets/packs/editor-projects-a0d6a9e16cf1c2c46219ef3d493...
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuCollab-1Ao7v > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuCollab-1Ao7v > img`	/assets/packs/editor-collab-90815f9b83fcbdbd3ef7df4573ed9...
div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img `div.HomepageAnonBottomAd_root-Qq1Ia > a.HomepageAnonBottomAd_mainAdLink-bfkfm > div.HomepageAnonBottomAd_image-j8pxc > img`	/uu/7/173968/1774279954-CodePen_Monthly_Sponser_BTF_-_600...
Salesfoce `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	/assets/packs/salesforce-63204abcda6bd196c6a6da3bb4911510...
Microsoft `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	/assets/packs/microsoft-0859118499110df3a66f00a999a53a40.png
Icon of conveyer belt with boxes on it. `div.width-wrapper > div.HomepageAnonCards_item-baxkw > div.HomepageAnonCards_icon-AFa+u > img`	/assets/packs/icon-build-0f21c66ed03bfb36c597636d27ca621e...
div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_mainSponsorBlockLink-pmIOu > div.HomepageAnonTopAd_image-nLPl7 > img `div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_mainSponsorBlockLink-pmIOu > div.HomepageAnonTopAd_image-nLPl7 > img`	static4.buysellads.net/uu/7/173968/1774279581-MongoDB_White_250x100.png
IBM `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/ibm-c6d225a3817a57e66f67fdcb18d1fe04.png
Adobe `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/adobe-0d9fee1af16f2db73270e52fbdcf4fe8.png
Icon of Map `div.width-wrapper > div.HomepageAnonCards_item-baxkw > div.HomepageAnonCards_icon-AFa+u > img`	/assets/packs/icon-learn-b1311620e99cea826f259aa2f7750940...
Airbnb `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/airbnb-cb44d3434e60956b120c2cfd2afa9a23.png
Square `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/square-e4a6fa8c30a53180c593a11aeb1618c2.png
Grubhub `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/grubhub-f05150a98afe6175f221f4bc75ac3372.png
Icon of Globe `div.width-wrapper > div.HomepageAnonCards_item-baxkw > div.HomepageAnonCards_icon-AFa+u > img`	/assets/packs/icon-share-910c683bbac21bf41fcf9aab64ebc957...
Netflix `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/netflix-8b4f0b76ad5ccaa1b6326267be6c396f.png
Lyft `div.width-wrapper > div.home-team-wrapper > div.HomepageAnonTeams_logos-CfZRo > img`	cpwebassets.codepen.io/assets/packs/lyft-87acc577a28f7c5fbafbed09b543dd91.png

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

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify JavaScript

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.4 s

●Avoid long main-thread tasks 3 long tasks found

●Avoid non-composited animations 5 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 170 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

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

●Avoid large layout shifts 5 layout shifts found

○INP breakdown

○User Timing marks and measures

Accessibility

Contrast

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

Failing Elements
ads via Carbon `div#ads > div#carbonads > span > a.carbon-poweredby`
MongoDB Flexible. Scalable. AI-ready. Build Apps anywhere with MongoDB Atlas. `div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_mainSponsorBlockLink-pmIOu > div > div.HomepageAnonTopAd_adMessage-TgODs`
SPONSOR `div.width-wrapper > div.HomepageAnonHeader_copy-gIp7Y > div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_sponsor-ltTh-`

These are opportunities to improve the legibility of your content.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Failing Elements
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

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.

Failing Elements
SPONSOR `div.width-wrapper > div.HomepageAnonHeader_copy-gIp7Y > div.HomepageAnonTopAd_root-ZycQ5 > a.HomepageAnonTopAd_sponsor-ltTh-`

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

●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

●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

●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

○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

○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.

○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.

Deprecation / Warning	Source
SharedStorage	codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	codepen.io/cdn-cgi/challenge-platform/scripts/jsd/main.js

URL
cpwebassets.codepen.io/assets/packs/js/vendor-9a4e874746c7ba6cb4f7.chunk.js
cpwebassets.codepen.io/assets/packs/js/6-71433d627ed09ffe0e50.chunk.js

●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 browser errors logged to the console

●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

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

SEO

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Failing Elements
div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img `div.HomepageAnonEditor_illu-80fK5 > ul.PRIVACY > li.HomepageAnonEditor_illuPrivacy-fPl-m > img`

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 have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`

Browse & Analyze

Learn

Results for https://www.codepen.io

Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Contrast

Names and labels

Best practices

Best Practices

General

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Contrast

Names and labels

Best practices

Best Practices

General

SEO

Content Best Practices

Keyboard Shortcuts