Mainichi.jp 毎日新聞のニュース・情報サイト
毎日新聞のニュース・情報サイトです。事件や話題、経済や政治のニュース、スポーツや芸能、映画などのエンターテインメントの最新ニュースを掲載しています。
mainichi.jp Desktop Performance
70/100
These metrics represent real-world Chrome users experience viewing mainichi.jp web page. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Input Delay
First Contentful Paint
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Largest Contentful Paint10/100 4.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index62/100 2.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint91/100 0.9 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Total Blocking Time100/100 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0.009
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Time to Interactive100/100 0.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Should Fix (18)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Properly size images
Potential savings of 967 KiB
890 ms
Serve images in next-gen formats
Potential savings of 786 KiB
710 ms
Eliminate render-blocking resources
Potential savings of 310 ms
313 ms
Remove unused JavaScript
Potential savings of 288 KiB
310 ms
Efficiently encode images
Potential savings of 131 KiB
90 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Does not use passive listeners to improve scrolling performance
Avoid `document.write()`
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
122 resources found
Avoid an excessive DOM size
1,280 elements
Avoid enormous network payloads
Total size was 2,952 KiB
Minimize main-thread work
2.2 s
Avoid chaining critical requests
11 chains found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
261 requests • 2,952 KiB
Avoid long main-thread tasks
2 long tasks found
Avoid large layout shifts
5 elements found
User Timing marks and measures
14 user timings
Passed Audits (12)
Remove unused CSS
Potential savings of 28 KiB
Initial server response time was short
Root document took 290 ms
Enable text compression
Potential savings of 11 KiB
Minify CSS
Potential savings of 4 KiB
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
Use video formats for animated content
JavaScript execution time
0.6 s
Defer offscreen images
Potential savings of 78 KiB
Avoid multiple page redirects
Potential savings of 4,730 ms
Preload key requests
Preconnect to required origins
Minify JavaScript
mainichi.jp Desktop SEO
82/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (2)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Image elements do not have `[alt]` attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (9)
Document has a meta description
Page isn’t blocked from indexing
Links have descriptive text
Page has successful HTTP status code
Document avoids plugins
Document has a valid `hreflang`
Document has a `<title>` element
Document has a valid `rel=canonical`
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
mainichi.jp Desktop Best Practices
69/100
These checks highlight opportunities to improve the overall code health of mainichi.jp page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (4)
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Links to cross-origin destinations are unsafe
Does not use HTTPS
1 insecure request found
General
Browser errors were logged to the console
Passed Audits (10)
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Allows users to paste into password fields
Avoids requesting the geolocation permission on page load
Detected JavaScript libraries
Avoids Application Cache
Page has the HTML doctype
Avoids deprecated APIs
Properly defines charset
Serves images with appropriate resolution
mainichi.jp Desktop Progressive Web App
22/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (9)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 21.2 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
PWA Optimized
Is not configured for a custom splash screen
Manifest doesn't have a maskable icon
Does not set a theme color for the address bar.
Installable
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Passed Audits (4)
Provides a valid `apple-touch-icon`
Redirects HTTP traffic to HTTPS
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
mainichi.jp Desktop Accessibility
60/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (6)
Navigation
These are opportunities to improve keyboard navigation in your application.
`[id]` attributes on active, focusable elements are not unique
Names and labels
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.
`<frame>` or `<iframe>` elements do not have a title
Image elements do not have `[alt]` attributes
Links do not have a discernible name
Form elements do not have associated labels
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (12)
`[aria-hidden="true"]` is not present on the document `<body>`
The page contains a heading, skip link, or landmark region
`<html>` element has a `[lang]` attribute
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Heading elements appear in a sequentially-descending order
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Document has a `<title>` element
`<html>` element has a valid value for its `[lang]` attribute
Definition list items are wrapped in `<dl>` elements
`[aria-hidden="true"]` elements do not contain focusable descendents
Desktop Speed
46/100
These checks analyze the performance of mainichi.jp on desktop devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (7)
Optimize images
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Enable compression
Minify HTML
Minify JavaScript
Minify CSS
Passed Audits (3)
Avoid landing page redirects
Reduce server response time
Prioritize visible content
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