Yomiuri.co.jp 読売新聞オンライン : ニュース＆お得サイト
読売新聞オンラインは読売新聞のニュース・情報サイト。社会、スポーツ、政治、経済、国際などの最新ニュースや教育、医療などの読み物、映像ニュースも充実。ポケモン、発言小町、クーポンやプレゼントも。2019年2月にYOMIURI ONLINEからサイト名を変更しました。
yomiuri.co.jp Desktop Performance
56/100
These metrics represent real-world Chrome users experience viewing yomiuri.co.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
Cumulative Layout Shift
Largest Contentful Paint
First Contentful Paint
First Input Delay
Metrics
Largest Contentful Paint6/100 5.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index33/100 2.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive65/100 3.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
First Contentful Paint65/100 1.4 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Total Blocking Time99/100 70 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 0.022
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (22)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 1,050 ms
1,054 ms
Avoid multiple page redirects
Potential savings of 340 ms
340 ms
Properly size images
Potential savings of 1,029 KiB
320 ms
Remove unused JavaScript
Potential savings of 286 KiB
320 ms
Serve images in next-gen formats
Potential savings of 317 KiB
170 ms
Efficiently encode images
Potential savings of 240 KiB
130 ms
Enable text compression
Potential savings of 95 KiB
120 ms
Remove unused CSS
Potential savings of 36 KiB
120 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
178 resources found
Avoid an excessive DOM size
2,233 elements
Minimize main-thread work
3.7 s
Avoid enormous network payloads
Total size was 3,482 KiB
Reduce JavaScript execution time
1.6 s
Avoid long main-thread tasks
4 long tasks found
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
25 chains found
User Timing marks and measures
14 user timings
Avoid large layout shifts
5 elements found
Keep request counts low and transfer sizes small
347 requests • 3,482 KiB
Passed Audits (8)
Defer offscreen images
Initial server response time was short
Root document took 40 ms
Preload key requests
Preconnect to required origins
Minify CSS
Minimize third-party usage
Third-party code blocked the main thread for 50 ms
Minify JavaScript
Potential savings of 47 KiB
Use video formats for animated content
yomiuri.co.jp Desktop SEO
91/100
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 (1)
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
Passed Audits (10)
Page isn’t blocked from indexing
Document has a meta description
Document has a valid `hreflang`
Page has successful HTTP status code
robots.txt is valid
Links are crawlable
Document avoids plugins
Links have descriptive text
Document has a `<title>` element
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
yomiuri.co.jp Desktop Best Practices
69/100
These checks highlight opportunities to improve the overall code health of yomiuri.co.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
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Does not use HTTPS
1 insecure request found
General
Browser errors were logged to the console
Passed Audits (10)
Allows users to paste into password fields
Displays images with correct aspect ratio
Page has the HTML doctype
Serves images with appropriate resolution
Properly defines charset
Avoids Application Cache
Avoids requesting the notification permission on page load
Detected JavaScript libraries
Avoids deprecated APIs
Avoids requesting the geolocation permission on page load
yomiuri.co.jp Desktop Progressive Web App
41/100
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 (5)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 31.3 s
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
PWA Optimized
Manifest doesn't have a maskable icon
Installable
Does not use HTTPS
1 insecure request found
Passed Audits (8)
Redirects HTTP traffic to HTTPS
Sets a theme color for the address bar.
Provides a valid `apple-touch-icon`
Registers a service worker that controls page and `start_url`
Web app manifest meets the installability requirements
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Configured for a custom splash screen
yomiuri.co.jp Desktop Accessibility
86/100
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 (4)
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.
Image elements do not have `[alt]` attributes
Links do not have a discernible name
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (21)
Buttons have an accessible name
`<frame>` or `<iframe>` elements have a title
`[id]` attributes on active, focusable elements are unique
`[aria-*]` attributes have valid values
`[aria-hidden="true"]` elements do not contain focusable descendents
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
ARIA IDs are unique
`[aria-hidden="true"]` is not present on the document `<body>`
The page contains a heading, skip link, or landmark region
`[aria-*]` attributes are valid and not misspelled
`[aria-*]` attributes match their roles
Definition list items are wrapped in `<dl>` elements
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`<html>` element has a `[lang]` attribute
No element has a `[tabindex]` value greater than 0
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
`<html>` element has a valid value for its `[lang]` attribute
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Document has a `<title>` element
Desktop Speed
32/100
These checks analyze the performance of yomiuri.co.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 (6)
Leverage browser caching
Optimize images
Enable compression
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Minify HTML
Minify JavaScript
Passed Audits (4)
Avoid landing page redirects
Reduce server response time
Minify CSS
Prioritize visible content
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