Skip to content
https://ixdf.org

Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

45

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 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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:59.213 source:map[column:2648 line:1 type:source-location url:https://assets.interaction-design.org/build/assets/app-CGlU-aIG.js urlProvider:network]]]

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-IMG
nodeLabel: div.w-171 > article.courseCard > div.relative > img.absolute
path: 1,HTML,1,BODY,5,DIV,3,MAIN,1,SECTION,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,IMG
selector: div.w-171 > article.courseCard > div.relative > img.absolute
snippet: <img data-scalable="" data-src="https://public-media.interaction-design.org/images/courses/v5/80-ai-for-de…" src="https://public-media.interaction-design.org/images/courses/v5/80-ai-for-de…" alt="" class="absolute inset-0 w-full h-full object-cover entered lazy-loaded loaded" loading="lazy" data-ll-status="loaded">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

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
Course Certificate div.flex > div.js-certificateFrame > div.relative > img.h-full
public-images.interaction-design.org/pages/v5/courses/certificate-example.jpg74.1 KiB62.7 KiB
div.w-171 > article.courseCard > div.relative > img.absolute div.w-171 > article.courseCard > div.relative > img.absolute
/images/courses/v5/64-design-for-the-21st-centiry-card-v1...52.1 KiB48.3 KiB
div.space-y-16 > div.flex > div.js-certificateFrame > img.pointer-events-none div.space-y-16 > div.flex > div.js-certificateFrame > img.pointer-events-none
public-images.interaction-design.org/certificates/certificate-frame.png?tr=w-90036.6 KiB34.5 KiB
section.bg-black > section#learn-from-the-best > picture > img.absolute section.bg-black > section#learn-from-the-best > picture > img.absolute
/pages/v5/why-join-us/learn-from-experts/bg-don-noman-v5....25.0 KiB22.9 KiB
Our clients: IBM, Harvard University, University of Cambridge, NASA, Adobe, Sta… div.flex > div.lg:max-w-325 > picture > img.grayscale
/build/assets/img/not-indexed/clients/client-logos-block-...23.6 KiB20.7 KiB
div.w-171 > article.courseCard > div.relative > img.absolute div.w-171 > article.courseCard > div.relative > img.absolute
/images/courses/v5/80-ai-for-designers-card-v1.png?tr=fo-...22.3 KiB20.6 KiB
div.max-w-screen > main.content-wrapper > div.relative > video#html5_video_9r6wi09ja4 div.max-w-screen > main.content-wrapper > div.relative > video#html5_video_9r6wi09ja4
public-images.interaction-design.org/banners/blog/open-access-banner.png12.8 KiB12.7 KiB
Smash Magazine Employee section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/smash-empl...8.8 KiB8.5 KiB
Netflix Employee section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/netflix-em...8.9 KiB8.3 KiB
NASA Employee section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/nasa-emplo...7.8 KiB7.6 KiB
Meta Employee section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/meta-emplo...5.8 KiB5.6 KiB
Author of Sprint Book section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/sprint-emp...5.4 KiB5.2 KiB
Adobe Employee section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/adobe-empl...5.4 KiB5.1 KiB
Walt Disney Employee section.bg-black > section#learn-from-the-best > div.pointer-events-none > img.absolute
/build/assets/img/not-indexed/brands/employees/walt-disne...5.1 KiB4.8 KiB
Don Norman section.px-16 > div.col-start-2 > div.flex > img.shrink-0
/build/assets/img/not-indexed/brands/reviewCards/brands/d...4.5 KiB4.1 KiB

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

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 610 ms 118.1 KiB
URLTransfer SizeEst Savings
t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c&gtm=4e64k1171.2 KiB60.1 KiB
t.ixdf.org/gtm.js?id=GTM-KJ8XGB155.3 KiB58.1 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable1.2 s51 ms0.0 ms
t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c&gtm=4e64k1870 ms749 ms93 ms
ixdf.org/808 ms26 ms7.8 ms
t.ixdf.org/gtm.js?id=GTM-KJ8XGB553 ms468 ms78 ms
assets.interaction-design.org/build/assets/bugsnag-1RJHgweM.js488 ms180 ms0.6 ms
assets.interaction-design.org/build/assets/app-CGlU-aIG.js308 ms69 ms0.4 ms
assets.interaction-design.org/build/assets/staggerRevealer-D9U4066z.js106 ms6.4 ms0.1 ms
assets.interaction-design.org/build/assets/typed.module-D-osZxX8.js100 ms78 ms0.3 ms
assets.interaction-design.org/build/assets/tailwind-DxFDGO_n.css58 ms0.0 ms0.0 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation1.7 s
Other1.7 s
Style & Layout558 ms
Rendering267 ms
Script Parsing & Compilation190 ms
Parse HTML & CSS182 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
A service worker attempted to send the page in back/forward cache a MessageEvent.Not actionable

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

●Use efficient cache lifetimes
●Layout shift culprits
●Document request latency
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoids enormous network payloads Total size was 915 KiB
●User Timing marks and measures 7 user timings
●Avoid long main-thread tasks 11 long tasks found
●Avoid non-composited animations 1 animated element found
●Image elements have explicit `width` and `height`
●Network Requests
●Network Round Trip Times 10 ms
●Server Backend Latencies 170 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 170 ms
●Avoid large layout shifts 14 layout shifts found
○INP breakdown
97

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
Start Today div.ml-auto > ul.flex > li.inline-block > a.button
Last Chance: Agentic AI for Product Design span.truncate > div > span.block > a.text-white
Learn Design From the Best div.md:flex > div.flex > div.md:mt-auto > a.button
View Course div.w-171 > article.courseCard > div.js-countdownDependentCardState > div.text-center
View Course div.w-171 > article.courseCard > div.js-countdownDependentCardState > div.text-center
View Master Class div.w-171 > article.courseCard > div.js-countdownDependentCardState > div.text-center
View Master Class div.w-171 > article.courseCard > div.js-countdownDependentCardState > div.text-center
See How Design Skills Turn Into Job Options section.px-16 > div.col-start-2 > div.relative > a.button
Save Settings consent-banner.z-(--z-notification) > div#consentBannerPanel > form.js-consentBannerForm > button.button
Feedback body.group/body > button#userback-placeholder > span

These are opportunities to improve the legibility of your content.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Terms / Privacy div.max-w-1024 > ul.fg-text-lg-long > li.md:order-0 > a
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●ARIA `progressbar` elements have accessible names
●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
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Uses ARIA roles only on compatible elements
○`[accesskey]` values are unique
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` 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.
○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
○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.
○Identical links have the same purpose.
○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

General

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c&gtm=4e64k1
ixdf.org/ixdf.org/build/assets/spriteLoadingScript-By7q79Wd.js.map
assets.interaction-design.org/build/assets/typed.module-D-osZxX8.jsassets.interaction-design.org/build/assets/typed.module-D-osZxX8.js.map
assets.interaction-design.org/build/assets/turnstile-BbaGyyLD.jsassets.interaction-design.org/build/assets/turnstile-BbaGyyLD.js.map
assets.interaction-design.org/build/assets/toggleContent-Cy4ryJnP.jsassets.interaction-design.org/build/assets/toggleContent-Cy4ryJnP.js.map
assets.interaction-design.org/build/assets/termsAcceptance-Cstw61QF.jsassets.interaction-design.org/build/assets/termsAcceptance-Cstw61QF.js.map
assets.interaction-design.org/build/assets/stepRevealer-DayWEkd0.jsassets.interaction-design.org/build/assets/stepRevealer-DayWEkd0.js.map
assets.interaction-design.org/build/assets/staggerRevealer-D9U4066z.jsassets.interaction-design.org/build/assets/staggerRevealer-D9U4066z.js.map
assets.interaction-design.org/build/assets/spinner--AwVl_E8.jsassets.interaction-design.org/build/assets/spinner--AwVl_E8.js.map
assets.interaction-design.org/build/assets/smoothAnchor-Bdh_NRTq.jsassets.interaction-design.org/build/assets/smoothAnchor-Bdh_NRTq.js.map
assets.interaction-design.org/build/assets/scrollRevealer-BcK13X9l.jsassets.interaction-design.org/build/assets/scrollRevealer-BcK13X9l.js.map
assets.interaction-design.org/build/assets/preload-helper-Vd77tpYK.jsassets.interaction-design.org/build/assets/preload-helper-Vd77tpYK.js.map
assets.interaction-design.org/build/assets/parallax-logos-BqRTuheS.jsassets.interaction-design.org/build/assets/parallax-logos-BqRTuheS.js.map
assets.interaction-design.org/build/assets/pageAnnouncementBar-CyEPpOOJ.jsassets.interaction-design.org/build/assets/pageAnnouncementBar-CyEPpOOJ.js.map
assets.interaction-design.org/build/assets/notification-f2Rm4oS7.jsassets.interaction-design.org/build/assets/notification-f2Rm4oS7.js.map
assets.interaction-design.org/build/assets/networkInfo-CziXFRAH.jsassets.interaction-design.org/build/assets/networkInfo-CziXFRAH.js.map
assets.interaction-design.org/build/assets/modalSearch-BWd-ssHS.jsassets.interaction-design.org/build/assets/modalSearch-BWd-ssHS.js.map
assets.interaction-design.org/build/assets/masterclass-BzX_SUpJ.jsassets.interaction-design.org/build/assets/masterclass-BzX_SUpJ.js.map
assets.interaction-design.org/build/assets/markupHelpers-B-h850f4.jsassets.interaction-design.org/build/assets/markupHelpers-B-h850f4.js.map
assets.interaction-design.org/build/assets/lottieAnimation-DMhzsEV0.jsassets.interaction-design.org/build/assets/lottieAnimation-DMhzsEV0.js.map
/build/assets/lazyLoadCollapsibleTextComponents-CwCKlxJI.js/build/assets/lazyLoadCollapsibleTextComponents-CwCKlxJI....
assets.interaction-design.org/build/assets/input-group-DFiLuqyD.jsassets.interaction-design.org/build/assets/input-group-DFiLuqyD.js.map
assets.interaction-design.org/build/assets/index-DsniQcEy.jsassets.interaction-design.org/build/assets/index-DsniQcEy.js.map
assets.interaction-design.org/build/assets/htmx.esm-DvapjafI.jsassets.interaction-design.org/build/assets/htmx.esm-DvapjafI.js.map
assets.interaction-design.org/build/assets/home--guest-DENvcSXh.jsassets.interaction-design.org/build/assets/home--guest-DENvcSXh.js.map
assets.interaction-design.org/build/assets/flip-DQyv0llD.jsassets.interaction-design.org/build/assets/flip-DQyv0llD.js.map
assets.interaction-design.org/build/assets/dropdown-CLorJQgv.jsassets.interaction-design.org/build/assets/dropdown-CLorJQgv.js.map
assets.interaction-design.org/build/assets/dialog-Du9t7X5F.jsassets.interaction-design.org/build/assets/dialog-Du9t7X5F.js.map
assets.interaction-design.org/build/assets/deferToIdle-Df67hio5.jsassets.interaction-design.org/build/assets/deferToIdle-Df67hio5.js.map
assets.interaction-design.org/build/assets/cssVariables-Bz9wRQEm.jsassets.interaction-design.org/build/assets/cssVariables-Bz9wRQEm.js.map
assets.interaction-design.org/build/assets/course-DfCRK5qh.jsassets.interaction-design.org/build/assets/course-DfCRK5qh.js.map
assets.interaction-design.org/build/assets/countdownClock-lemW8VqQ.jsassets.interaction-design.org/build/assets/countdownClock-lemW8VqQ.js.map
assets.interaction-design.org/build/assets/countdown-CmVz2Sgd.jsassets.interaction-design.org/build/assets/countdown-CmVz2Sgd.js.map
assets.interaction-design.org/build/assets/cookie-RmvTIN1d.jsassets.interaction-design.org/build/assets/cookie-RmvTIN1d.js.map
assets.interaction-design.org/build/assets/consentBanner-yKy0vSZM.jsassets.interaction-design.org/build/assets/consentBanner-yKy0vSZM.js.map
assets.interaction-design.org/build/assets/button-DU36gPX9.jsassets.interaction-design.org/build/assets/button-DU36gPX9.js.map
assets.interaction-design.org/build/assets/bugsnag-1RJHgweM.jsassets.interaction-design.org/build/assets/bugsnag-1RJHgweM.js.map
assets.interaction-design.org/build/assets/breakpoint-COZXuT31.jsassets.interaction-design.org/build/assets/breakpoint-COZXuT31.js.map
assets.interaction-design.org/build/assets/bootstrap-BmKlTEo4.jsassets.interaction-design.org/build/assets/bootstrap-BmKlTEo4.js.map
assets.interaction-design.org/build/assets/belowTheFold-BDyaSEvc.jsassets.interaction-design.org/build/assets/belowTheFold-BDyaSEvc.js.map
assets.interaction-design.org/build/assets/auth-S67ULf_r.jsassets.interaction-design.org/build/assets/auth-S67ULf_r.js.map
assets.interaction-design.org/build/assets/app-CGlU-aIG.jsassets.interaction-design.org/build/assets/app-CGlU-aIG.js.map
assets.interaction-design.org/build/assets/accordionList-DzqSkMOE.jsassets.interaction-design.org/build/assets/accordionList-DzqSkMOE.js.map
assets.interaction-design.org/build/assets/_commonjsHelpers-CE1G-McA.jsassets.interaction-design.org/build/assets/_commonjsHelpers-CE1G-McA.js.map
●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
●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
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`

Send Feedback