Tenki.jp 日本気象協会 tenki.jp【公式】 / 天気・地震・台風
日本気象協会公式の天気予報専門メディアです。市区町村別のピンポイントな天気予報に加え、専門的な気象情報、地震・津波などの防災情報を提供します。気象予報士が日々更新する日直予報士、花粉や熱中症、スキー積雪などの季節特集も人気です。
tenki.jp Mobile Performance
18/100
These metrics represent real-world Chrome users experience viewing tenki.jp on mobile devices. 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
First Input Delay
First Contentful Paint
Largest Contentful Paint
Metrics
Time to Interactive0/100 34.7 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Largest Contentful Paint0/100 12.1 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index1/100 16.1 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Total Blocking Time3/100 1,750 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
First Contentful Paint79/100 2.8 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0.026
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.
Serve images in next-gen formats
Potential savings of 1,027 KiB
7,020 ms
Efficiently encode images
Potential savings of 725 KiB
5,370 ms
Properly size images
Potential savings of 455 KiB
4,140 ms
Remove unused JavaScript
Potential savings of 450 KiB
2,760 ms
Eliminate render-blocking resources
Potential savings of 1,300 ms
1,304 ms
Avoid multiple page redirects
Potential savings of 1,110 ms
1,110 ms
Defer offscreen images
Potential savings of 147 KiB
780 ms
Enable text compression
Potential savings of 56 KiB
270 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Minimize main-thread work
16.3 s
Ensure text remains visible during webfont load
Reduce the impact of third-party code
Third-party code blocked the main thread for 1,150 ms
Avoid `document.write()`
Serve static assets with an efficient cache policy
109 resources found
Reduce JavaScript execution time
9.0 s
Avoid enormous network payloads
Total size was 4,028 KiB
Avoid an excessive DOM size
1,009 elements
Largest Contentful Paint element
1 element found
Avoid large layout shifts
3 elements found
Avoid long main-thread tasks
20 long tasks found
User Timing marks and measures
14 user timings
Keep request counts low and transfer sizes small
530 requests • 4,028 KiB
Avoid chaining critical requests
8 chains found
Passed Audits (8)
Initial server response time was short
Root document took 480 ms
Minify CSS
Potential savings of 6 KiB
Preconnect to required origins
Uses passive listeners to improve scrolling performance
Minify JavaScript
Potential savings of 13 KiB
Remove unused CSS
Potential savings of 32 KiB
Use video formats for animated content
Preload key requests
tenki.jp Mobile SEO
77/100
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 (3)
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
Document does not have a valid `rel=canonical`
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (10)
Tap targets are sized appropriately
100% appropriately sized tap targets
Document uses legible font sizes
82.03% legible text
Document has a meta description
Page has successful HTTP status code
Document avoids plugins
Document has a `<title>` element
Links have descriptive text
Page isn’t blocked from indexing
Document has a valid `hreflang`
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
tenki.jp Mobile Best Practices
62/100
These checks highlight opportunities to improve the overall code health of tenki.jp mobile 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 (5)
Trust and Safety
Does not use HTTPS
1 insecure request found
Includes front-end JavaScript libraries with known security vulnerabilities
3 vulnerabilities detected
Links to cross-origin destinations are unsafe
User Experience
Serves images with low resolution
General
Browser errors were logged to the console
Passed Audits (9)
Displays images with correct aspect ratio
Detected JavaScript libraries
Avoids Application Cache
Avoids requesting the geolocation permission on page load
Allows users to paste into password fields
Avoids requesting the notification permission on page load
Properly defines charset
Page has the HTML doctype
Avoids deprecated APIs
tenki.jp Mobile Progressive Web App
25/100
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)
PWA Optimized
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Installable
Does not use HTTPS
1 insecure request found
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 34.7 s
Passed Audits (5)
Contains some content when JavaScript is not available
Provides a valid `apple-touch-icon`
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
tenki.jp Mobile Accessibility
53/100
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 (5)
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
`<frame>` or `<iframe>` elements do not have a title
Tables and lists
These are opportunities to to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Passed Audits (9)
Heading elements appear in a sequentially-descending order
`[id]` attributes on active, focusable elements are unique
The page contains a heading, skip link, or landmark region
Links have a discernible name
`<html>` element has a valid value for its `[lang]` attribute
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-hidden="true"]` is not present on the document `<body>`
`<html>` element has a `[lang]` attribute
Mobile Usability
99/100
These checks validate how easily a visitor can use tenki.jp on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).
Should Fix (1)
Size tap targets appropriately
Passed Audits (4)
Avoid plugins
Configure the viewport
Size content to viewport
Use legible font sizes
Mobile Speed
35/100
These checks analyze the performance of tenki.jp on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (7)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Enable compression
Avoid landing page redirects
Optimize images
Leverage browser caching
Minify HTML
Minify JavaScript
Passed Audits (3)
Reduce server response time
Minify CSS
Prioritize visible content
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