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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
lantian.pub/assets/fa-solid-900.CTAAxXor.woff2	60 ms

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:109.637 source:map[column:947 line:0 type:source-location url:https://lantian.pub/assets/PlausibleAnalytics.astro_astro_type_script_index_0_lang.CCqn5Tkb.js urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
lantian.pub/assets/PostText.ECbz3ClE.css	62.9 KiB	450 ms

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.

	URL	Resource Size	Est Savings
在 DN42 中使用 FlapAlerted 抑制 Flapping 的插图 `div.post-wrap > div.post-image-wrap > picture > img`	lantian.pub/usr/uploads/202512/im-doing-my-part.png.thumb.png.webp	45.5 KiB	38.1 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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 58.9 KiB

URL	Transfer Size	Est Savings
lantian.pub/assets/PostText.ECbz3ClE.css	62.2 KiB	58.9 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
在 DN42 中使用 FlapAlerted 抑制 Flapping 的插图 `div.post-wrap > div.post-image-wrap > picture > img`	lantian.pub/usr/uploads/202512/im-doing-my-part.png.thumb.png.webp
NixOS 系列（五）：制作小内存 VPS 的 DD 磁盘镜像的插图 `div.post-wrap > div.post-image-wrap > picture > img`	lantian.pub/usr/uploads/202110/nixos-social-preview.png.thumb.png.webp
从零开始实现 Nix 对数函数库的插图 `div.post-wrap > div.post-image-wrap > picture > img`	lantian.pub/usr/uploads/202505/logarithm.png.thumb.png.webp

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

●Time to Interactive 3.1 s

●Use efficient cache lifetimes

●Layout shift culprits

●Document request latency

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 418 KiB

●JavaScript execution time 0.1 s

●Minimizes main-thread work 1.8 s

●Avoid long main-thread tasks 5 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 40 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Lan Tian @ Blog `div#container > nav.lantian > div.container-fluid > a.navbar-brand`
05-13 `div.post-meta-wrap > div.post-meta > p > small`
娱乐 `div.post-meta-wrap > div.post-meta > p > small`
3 标签 `div.post-meta-wrap > div.post-meta > p > small`
AI Agent 试图扫描 DN42 时把主人搞破产了 `div.d-flex > div.post-wrap > h1.post-title > a`
04-13 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
4 标签 `div.post-meta-wrap > div.post-meta > p > small`
魔改 FileZilla 解决拓竹 3D 打印机的 FTP 问题 `div.d-flex > div.post-wrap > h1.post-title > a`
12-07 `div.post-meta-wrap > div.post-meta > p > small`
网站与服务端 `div.post-meta-wrap > div.post-meta > p > small`
3 标签 `div.post-meta-wrap > div.post-meta > p > small`
在 DN42 中使用 FlapAlerted 抑制 Flapping `div.d-flex > div.post-wrap > h1.post-title > a`
07-20 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
4 标签 `div.post-meta-wrap > div.post-meta > p > small`
用 Open5GS 搭建合法的 LTE 网络 `div.d-flex > div.post-wrap > h1.post-title > a`
06-27 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
3 标签 `div.post-meta-wrap > div.post-meta > p > small`
在内网中免 StosVPN 使用 SideStore `div.d-flex > div.post-wrap > h1.post-title > a`
05-19 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
2 标签 `div.post-meta-wrap > div.post-meta > p > small`
从零开始实现 Nix 对数函数库 `div.d-flex > div.post-wrap > h1.post-title > a`
04-06 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
4 标签 `div.post-meta-wrap > div.post-meta > p > small`
$100，DIY 搭建合法的 LTE 网络 `div.d-flex > div.post-wrap > h1.post-title > a`
02-10 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
5 标签 `div.post-meta-wrap > div.post-meta > p > small`
用 Nix 编译自定义 Android 内核 `div.d-flex > div.post-wrap > h1.post-title > a`
04-20 `div.post-meta-wrap > div.post-meta > p > small`
网站与服务端 `div.post-meta-wrap > div.post-meta > p > small`
2 标签 `div.post-meta-wrap > div.post-meta > p > small`
使用 Astro.js 重构我的博客 `div.d-flex > div.post-wrap > h1.post-title > a`
12-16 `div.post-meta-wrap > div.post-meta > p > small`
计算机与客户端 `div.post-meta-wrap > div.post-meta > p > small`
1 标签 `div.post-meta-wrap > div.post-meta > p > small`
NixOS 系列（五）：制作小内存 VPS 的 DD 磁盘镜像 `div.d-flex > div.post-wrap > h1.post-title > a`
20 `div#container > footer.clearfix > div.page-navigator > a.page-number`

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.

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>`

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

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

●Buttons have an accessible name

●Image elements have `[alt]` attributes

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

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

●Elements 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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

○`[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-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

○`[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

○Form elements have associated labels

○Links are distinguishable without relying on color.

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

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

○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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

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`