Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
lobste.rs/avatars/milkcanworld-32.png	0.0 ms	3.0 KiB
lobste.rs/avatars/jfred-32.png	0.0 ms	2.8 KiB
lobste.rs/avatars/snej-32.png	0.0 ms	2.8 KiB
lobste.rs/avatars/LesleyLai-32.png	0.0 ms	2.7 KiB
lobste.rs/avatars/uncenter-32.png	0.0 ms	2.7 KiB
lobste.rs/avatars/krig-32.png	0.0 ms	2.4 KiB
lobste.rs/avatars/deevus-32.png	0.0 ms	2.4 KiB
lobste.rs/avatars/Aks-32.png	0.0 ms	2.3 KiB
lobste.rs/avatars/bugsmith-32.png	0.0 ms	2.1 KiB
lobste.rs/avatars/vpol-32.png	0.0 ms	2.1 KiB
lobste.rs/avatars/Corbin-32.png	0.0 ms	1.9 KiB
lobste.rs/avatars/calvin-32.png	0.0 ms	1.5 KiB
lobste.rs/avatars/tsg-32.png	0.0 ms	1.4 KiB
lobste.rs/avatars/linkdd-32.png	0.0 ms	1.4 KiB
lobste.rs/avatars/ltratt-32.png	0.0 ms	1.3 KiB
lobste.rs/avatars/amoroso-32.png	0.0 ms	1.2 KiB
lobste.rs/avatars/eregon-32.png	0.0 ms	1.2 KiB
lobste.rs/avatars/ciferkey-32.png	0.0 ms	1.2 KiB
lobste.rs/avatars/jmelesky-32.png	0.0 ms	1.1 KiB
lobste.rs/avatars/LAC-Tech-32.png	0.0 ms	1.0 KiB
lobste.rs/avatars/intarga-32.png	0.0 ms	1003 B
lobste.rs/avatars/zk-32.png	0.0 ms	861 B
lobste.rs/avatars/technetium-32.png	0.0 ms	813 B
lobste.rs/avatars/zmitchell-32.png	0.0 ms	704 B
lobste.rs/avatars/eBPF-32.png	0.0 ms	610 B

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
lobste.rs/assets/light-normal-bf538ff1.css	968 B
lobste.rs/assets/dark-normal-b6128952.css	984 B
lobste.rs/assets/light-high-56dfc432.css	939 B
lobste.rs/assets/dark-high-dd12f301.css	952 B

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

Diagnostics

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 2.5 KiB

URL	Transfer Size	Est Savings
lobste.rs/assets/application-27162bd9.css	11.3 KiB	2.5 KiB

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

●Max Potential First Input Delay 70 ms

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●Improve image delivery

●LCP breakdown

●Modern HTTP

●Network dependency tree

●Optimize viewport for mobile

●Time to Interactive 1.1 s

●Minify JavaScript

●Reduce unused CSS

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 74 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.6 s

●Avoid long main-thread tasks 2 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 80 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 120 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Login `body > header#nav > nav.corner > a.corner`
48 `li#story_q6j2fu > div.story_liner > div.voters > a.upvoter`
tratt.net `li#story_q6j2fu > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
ltratt `div.story_liner > div.details > div.byline > a.u-author`
11 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
36 `li#story_otzxqs > div.story_liner > div.voters > a.upvoter`
jon.chrt.dev `li#story_otzxqs > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
bugsmith `div.story_liner > div.details > div.byline > a.u-author`
10 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
28 `li#story_nihbc8 > div.story_liner > div.voters > a.upvoter`
fsf.org `li#story_nihbc8 > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
jfred `div.story_liner > div.details > div.byline > a.u-author`
3 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
18 `li#story_ydlsfn > div.story_liner > div.voters > a.upvoter`
app.element.io `li#story_ydlsfn > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
milkcanworld `div.story_liner > div.details > div.byline > a.u-author`
2 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
24 `li#story_jbyxup > div.story_liner > div.voters > a.upvoter`
bsky.app `li#story_jbyxup > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
linkdd `div.story_liner > div.details > div.byline > a.u-author`
7 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
github.com/xataio `li#story_8disen > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
tsg `div.story_liner > div.details > div.byline > a.u-author`
6 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
146 `li#story_4vvozb > div.story_liner > div.voters > a.upvoter`
ziglang.org `li#story_4vvozb > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
vpol `div.story_liner > div.details > div.byline > a.u-author`
31 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
56 `li#story_vb70md > div.story_liner > div.voters > a.upvoter`
tinkering.xyz `li#story_vb70md > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
zmitchell `div.story_liner > div.details > div.byline > a.u-author`
19 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
33 `li#story_zubxux > div.story_liner > div.voters > a.upvoter`
lewiscampbell.tech `li#story_zubxux > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
LAC-Tech `div.story_liner > div.details > div.byline > a.u-author`
23 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
arxiv.org `li#story_r4dspa > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
krig `div.story_liner > div.details > div.byline > a.u-author`
5 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
17 `li#story_hphrhd > div.story_liner > div.voters > a.upvoter`
warped3.substack.com `li#story_hphrhd > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
technetium `div.story_liner > div.details > div.byline > a.u-author`
10 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
stylewarning.com `li#story_inohss > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
Corbin `div.story_liner > div.details > div.byline > a.u-author`
6 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
69 `li#story_ak5mgm > div.story_liner > div.voters > a.upvoter`
codeberg.org `li#story_ak5mgm > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
jmelesky `div.story_liner > div.details > div.byline > a.u-author`
30 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
29 `li#story_orvtly > div.story_liner > div.voters > a.upvoter`
iczelia.net `li#story_orvtly > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
eBPF `div.story_liner > div.details > div.byline > a.u-author`
17 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
58 `li#story_l6c9wi > div.story_liner > div.voters > a.upvoter`
lisyarus.github.io `li#story_l6c9wi > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
intarga `div.story_liner > div.details > div.byline > a.u-author`
29 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
17 `li#story_tb3mga > div.story_liner > div.voters > a.upvoter`
fset.common-lisp.dev `li#story_tb3mga > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
amoroso `div.story_liner > div.details > div.byline > a.u-author`
13 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
freebsdfoundation.org `li#story_9ooaxp > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
calvin `div.story_liner > div.details > div.byline > a.u-author`
7 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
13 `li#story_xt0wqm > div.story_liner > div.voters > a.upvoter`
daverupert.com `li#story_xt0wqm > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
uncenter `div.story_liner > div.details > div.byline > a.u-author`
5 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
23 `li#story_krdjnf > div.story_liner > div.voters > a.upvoter`
truffleruby.dev `li#story_krdjnf > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
eregon `div.story_liner > div.details > div.byline > a.u-author`
25 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
simonhartcher.com `li#story_51obiz > div.story_liner > div.details > a.domain`
authored by `div.story_liner > div.details > div.byline > span`
deevus `div.story_liner > div.details > div.byline > a.u-author`
15 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
dbreunig.com `li#story_dzlbeb > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
zk `div.story_liner > div.details > div.byline > a.u-author`
33 minutes ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
30 `li#story_7lmezq > div.story_liner > div.voters > a.upvoter`
adele.pages.casa `li#story_7lmezq > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
Aks `div.story_liner > div.details > div.byline > a.u-author`
28 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
28 `li#story_nfelvb > div.story_liner > div.voters > a.upvoter`
armanckeser.com `li#story_nfelvb > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
ciferkey `div.story_liner > div.details > div.byline > a.u-author`
23 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
github.com/inamiy `li#story_mt33ed > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
snej `div.story_liner > div.details > div.byline > a.u-author`
7 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
57 `li#story_hedf1w > div.story_liner > div.voters > a.upvoter`
trifectatech.org `li#story_hedf1w > div.story_liner > div.details > a.domain`
via `div.story_liner > div.details > div.byline > span`
LesleyLai `div.story_liner > div.details > div.byline > a.u-author`
36 hours ago `div.story_liner > div.details > div.byline > time`
caches `div.story_liner > div.details > div.byline > label.caches`
About `body > footer > nav > a`
Tags `body > footer > nav > a`
Filter `body > footer > nav > a`
Moderation Log `body > footer > nav > a`

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
bugsmith `div.story_liner > div.details > div.byline > a.u-author`
zmitchell `div.story_liner > div.details > div.byline > a.u-author`
LAC-Tech `div.story_liner > div.details > div.byline > a.u-author`
eregon `div.story_liner > div.details > div.byline > a.u-author`
deevus `div.story_liner > div.details > div.byline > a.u-author`

These are opportunities to improve the legibility of your content.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
compilers `div.story_liner > div.details > span.tags > a.tag`
programming `div.story_liner > div.details > span.tags > a.tag`
vibecoding `div.story_liner > div.details > span.tags > a.tag`
adele.pages.casa `li#story_7lmezq > div.story_liner > div.details > a.domain`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `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

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

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

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○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

○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.

○Image elements have `[alt]` attributes

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Image elements do not have `[alt]` attributes that are redundant text.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

○Image elements have `[alt]` attributes

○Document has a valid `rel=canonical`