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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

85

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.

RequestCache TTLTransfer Size
live.blog-tags.st-hatena.com/_next/static/chunks/commons.d78459f0c3cff869b62b.js0.0 ms163.9 KiB
//_next/static/images/feature_learn-thoughts-b4ef37cdc6dc...0.0 ms106.2 KiB
//_next/static/images/feature_add-tag-on-article-8f5132cf...0.0 ms84.8 KiB
//_next/static/images/feature_meaning-fdcdc80e96fb5b10479...0.0 ms28.2 KiB
live.blog-tags.st-hatena.com/_next/static/ecCy-ZoXLhV5wFwpEDUKj/pages/_app.js0.0 ms25.6 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
live.blog-tags.st-hatena.com/_next/static/ecCy-ZoXLhV5wFwpEDUKj/pages/index.js0.0 ms8.0 KiB
//_next/static/images/hero_illust-932d6c18159d86d4210bba5...0.0 ms4.7 KiB
live.blog-tags.st-hatena.com/_next/static/runtime/main-389f2d5a5a59288bda75.js0.0 ms4.6 KiB
//_next/static/images/logo_hatenablog-66372581323c8b8b420...0.0 ms1.9 KiB
//_next/static/images/serviceLogo-69b3b2c074e155b6211649f...0.0 ms1.6 KiB
/_next/static/runtime/webpack-035ac2b14bde147cb4a8.js0.0 ms913 B
//_next/static/images/speechBubbles-825424f22f6bd0bedfc11...0.0 ms608 B
//_next/static/images/connect-09625212c0af8fcf5e44ba67baf...0.0 ms570 B
//_next/static/images/book-2a2b46c9841dbc9af521bb64d4f8b8...0.0 ms437 B
//_next/static/images/dropdown-toggle-48acc6210a8563e4d5f...0.0 ms389 B

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: 言葉の解説だけでなく、ブロガーの意見も、ネットで話題の記事も、はてなブログ タグでチェックできます。
path: 1,HTML,1,BODY,0,DIV,0,DIV,0,DIV,2,HEADER,1,FIGURE,0,IMG
selector: div.sc-kYHfwS > header.sc-dVNjXY > figure > img
snippet: <img src="https://live.blog-tags.st-hatena.com//_next/static/images/hero_illust-932d…" alt="言葉の解説だけでなく、ブロガーの意見も、ネットで話題の記事も、はてなブログ タグでチェックできます。">

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
たとえば「聖地巡礼」タグをチェックすれば、ブロガーの旅行日記やネット上のさまざまなニュースを知ることができます。 div.sc-kYHfwS > section.sc-dtDOqo > figure > img
//_next/static/images/feature_learn-thoughts-b4ef37cdc6dc...106.6 KiB78.7 KiB
はてなブログで、記事にタグをつけて投稿しましょう。似た趣味をもつ人に自分の記事を知らせることができます。 div.sc-kYHfwS > section.sc-dtDOqo > figure > img
//_next/static/images/feature_add-tag-on-article-8f5132cf...95.6 KiB62.8 KiB
「自担」といった言葉の意味も、はてなブログ タグで調べることができます。 div.sc-kYHfwS > section.sc-dtDOqo > figure > img
//_next/static/images/feature_meaning-fdcdc80e96fb5b10479...28.9 KiB20.9 KiB

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

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

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
The page has an unload handler in the main frame.Actionable

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: 0.0 ms 239.2 KiB
URLTransfer SizeEst Savings
live.blog-tags.st-hatena.com/_next/static/chunks/commons.d78459f0c3cff869b62b.js163.8 KiB91.8 KiB
www.googletagmanager.com/gtag/js?id=UA-46136157-1124.8 KiB63.8 KiB
www.googletagmanager.com/gtag/js?id=G-DWG0LC0DR1&cx=c&gtm=4e64k0145.6 KiB63.3 KiB
live.blog-tags.st-hatena.com/_next/static/ecCy-ZoXLhV5wFwpEDUKj/pages/_app.js25.5 KiB20.4 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
「自担」といった言葉の意味も、はてなブログ タグで調べることができます。 div.sc-kYHfwS > section.sc-dtDOqo > figure > img
//_next/static/images/feature_meaning-fdcdc80e96fb5b10479...
たとえば「聖地巡礼」タグをチェックすれば、ブロガーの旅行日記やネット上のさまざまなニュースを知ることができます。 div.sc-kYHfwS > section.sc-dtDOqo > figure > img
//_next/static/images/feature_learn-thoughts-b4ef37cdc6dc...
はてなブログで、記事にタグをつけて投稿しましょう。似た趣味をもつ人に自分の記事を知らせることができます。 div.sc-kYHfwS > section.sc-dtDOqo > figure > img
//_next/static/images/feature_add-tag-on-article-8f5132cf...
言葉の解説だけでなく、ブロガーの意見も、ネットで話題の記事も、はてなブログ タグでチェックできます。 div.sc-kYHfwS > header.sc-dVNjXY > figure > img
//_next/static/images/hero_illust-932d6c18159d86d4210bba5...
はてなブログ div.sc-kYHfwS > footer.sc-bQtKYq > a.sc-fXEqDS > img
//_next/static/images/logo_hatenablog-66372581323c8b8b420...

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

●Max Potential First Input Delay 110 ms
●Layout shift culprits
●Document request latency
●Optimize DOM size
●Font display
●Forced reflow
●LCP breakdown
●Modern HTTP
●Network dependency tree
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoids enormous network payloads Total size was 740 KiB
●User Timing marks and measures 9 user timings
●JavaScript execution time 0.3 s
●Minimizes main-thread work 0.6 s
●Avoid long main-thread tasks 3 long tasks found
●Network Requests
●Network Round Trip Times 220 ms
●Server Backend Latencies 230 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 240 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○Avoid non-composited animations
86

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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
たとえばこんなタグをチェック！ div.sc-hAcGzb > div.sc-kYHfwS > section#intro > h4
今後登場 タグ説明の編集が可能に！ section.sc-dtDOqo > div > div.sc-uojGG > h5
はてなブログを書けば、もっと楽しめる！ section.sc-dtDOqo > div > header > h5
そのほかのご質問・お問い合わせは div.sc-hAcGzb > div.sc-kYHfwS > section.sc-jHkVzv > h4

These are opportunities to improve keyboard navigation in your application.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These are opportunities to improve the interpretation of your content by users in different locales.

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-hidden="true"]` is not present on the document `<body>`
●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.
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●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.
○`[accesskey]` values are unique
○`[aria-*]` attributes match their roles
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA attributes are used as specified for the element's role
○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
○Elements use only permitted ARIA attributes
○`[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
○`[aria-*]` attributes have valid values
○`[aria-*]` attributes are valid and not misspelled
○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 a valid value for its `[lang]` attribute
○`<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
○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.
81

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
live.blog-tags.st-hatena.com/_next/static/chunks/commons.d78459f0c3cff869b62b.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
●Use a strong HSTS policy
●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
○Mitigate clickjacking with XFO or CSP
92

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
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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