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 Desktop Performance
57/100
These metrics represent real-world Chrome users experience viewing tenki.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 Input Delay
First Contentful Paint
Metrics
Speed Index4/100 4.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint26/100 3.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive45/100 4.7 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time93/100 130 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
First Contentful Paint97/100 0.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0.001
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (18)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Reduce initial server response time
Root document took 2,160 ms
1,563 ms
Remove unused JavaScript
Potential savings of 415 KiB
920 ms
Properly size images
Potential savings of 895 KiB
870 ms
Serve images in next-gen formats
Potential savings of 913 KiB
790 ms
Efficiently encode images
Potential savings of 450 KiB
470 ms
Eliminate render-blocking resources
Potential savings of 340 ms
337 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Avoid `document.write()`
Serve static assets with an efficient cache policy
147 resources found
Minimize main-thread work
5.1 s
Avoid enormous network payloads
Total size was 4,602 KiB
Avoid an excessive DOM size
1,445 elements
Reduce JavaScript execution time
2.4 s
User Timing marks and measures
30 user timings
Avoid long main-thread tasks
5 long tasks found
Avoid large layout shifts
2 elements found
Keep request counts low and transfer sizes small
505 requests • 4,602 KiB
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
7 chains found
Passed Audits (12)
Use video formats for animated content
Defer offscreen images
Potential savings of 2 KiB
Uses passive listeners to improve scrolling performance
Minify CSS
Potential savings of 7 KiB
Preload key requests
Preconnect to required origins
Avoid multiple page redirects
Potential savings of 190 ms
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
Enable text compression
Potential savings of 7 KiB
All text remains visible during webfont loads
Remove unused CSS
Potential savings of 30 KiB
Minify JavaScript
Potential savings of 13 KiB
tenki.jp Desktop SEO
70/100
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
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. Learn more.
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (7)
Document has a valid `hreflang`
Document avoids plugins
Links have descriptive text
Page has successful HTTP status code
Page isn’t blocked from indexing
Document has a meta description
Document has a `<title>` element
tenki.jp Desktop Best Practices
69/100
These checks highlight opportunities to improve the overall code health of tenki.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
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
3 vulnerabilities detected
General
Browser errors were logged to the console
Passed Audits (10)
Allows users to paste into password fields
Avoids Application Cache
Page has the HTML doctype
Displays images with correct aspect ratio
Serves images with appropriate resolution
Properly defines charset
Avoids deprecated APIs
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Detected JavaScript libraries
tenki.jp Desktop Progressive Web App
15/100
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 (10)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 36.0 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
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`
PWA Optimized
Is not configured for a custom splash screen
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Manifest doesn't have a maskable icon
Does not set a theme color for the address bar.
Passed Audits (3)
Contains some content when JavaScript is not available
Provides a valid `apple-touch-icon`
Redirects HTTP traffic to HTTPS
tenki.jp Desktop Accessibility
65/100
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.
`<frame>` or `<iframe>` elements do not have a title
Image elements do not have `[alt]` attributes
Form elements do not have associated labels
Navigation
These are opportunities to improve keyboard navigation in your application.
Some elements have a `[tabindex]` value greater than 0
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (14)
`<html>` element has a `[lang]` attribute
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`[aria-hidden="true"]` is not present on the document `<body>`
`<html>` element has a valid value for its `[lang]` attribute
`[aria-hidden="true"]` elements do not contain focusable descendents
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.
The page contains a heading, skip link, or landmark region
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[id]` attributes on active, focusable elements are unique
Buttons have an accessible name
Document has a `<title>` element
Heading elements appear in a sequentially-descending order
Links have a discernible name
Desktop Speed
54/100
These checks analyze the performance of tenki.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)
Enable compression
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Optimize images
Avoid landing page redirects
Minify JavaScript
Minify HTML
Passed Audits (3)
Reduce server response time
Minify CSS
Prioritize visible content
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