Iknow.jp iKnow!で英語。ちょっとの努力で、大きな成果を。 - iKnow!
iKnow! なら、英語が身につく続く。リスニング、単語、センテンスなど複数のスキルが同時に鍛えられるので効率的。PC、スマホ、タブレットからいつでもどこでも学習が可能。1分程度の待ち時間も活用できるので、継続しやすい。
iknow.jp Mobile Performance
46/100
These metrics represent real-world Chrome users experience viewing iknow.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
First Input Delay
Largest Contentful Paint
First Contentful Paint
Cumulative Layout Shift
Metrics
Largest Contentful Paint1/100 9.3 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index33/100 7.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive49/100 7.4 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
First Contentful Paint66/100 3.4 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift78/100 0.143
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time80/100 370 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Should Fix (16)
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 458 KiB
2,850 ms
Remove unused JavaScript
Potential savings of 188 KiB
1,850 ms
Eliminate render-blocking resources
Potential savings of 1,670 ms
1,671 ms
Properly size images
Potential savings of 298 KiB
1,500 ms
Reduce initial server response time
Root document took 1,190 ms
591 ms
Remove unused CSS
Potential savings of 88 KiB
450 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Avoid `document.write()`
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
13 resources found
Minimize main-thread work
3.7 s
Reduce JavaScript execution time
1.4 s
Avoid chaining critical requests
9 chains found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
59 requests • 1,235 KiB
Avoid large layout shifts
5 elements found
Avoid long main-thread tasks
15 long tasks found
Passed Audits (13)
Use video formats for animated content
Minimize third-party usage
Third-party code blocked the main thread for 220 ms
Uses passive listeners to improve scrolling performance
Avoid multiple page redirects
Potential savings of 630 ms
Minify JavaScript
Avoids an excessive DOM size
287 elements
Avoids enormous network payloads
Total size was 1,235 KiB
Defer offscreen images
Preconnect to required origins
Minify CSS
Potential savings of 4 KiB
Preload key requests
Efficiently encode images
Enable text compression
iknow.jp Mobile SEO
98/100
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)
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.
Tap targets are not sized appropriately
78% appropriately sized tap targets
Passed Audits (12)
Document has a meta description
robots.txt is valid
Document has a valid `hreflang`
Image elements have `[alt]` attributes
Page isn’t blocked from indexing
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Links are crawlable
Document uses legible font sizes
96.82% legible text
Links have descriptive text
Page has successful HTTP status code
Document avoids plugins
Document has a `<title>` element
iknow.jp Mobile Best Practices
69/100
These checks highlight opportunities to improve the overall code health of iknow.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 (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
5 vulnerabilities detected
User Experience
Serves images with low resolution
Passed Audits (10)
Detected JavaScript libraries
Avoids requesting the geolocation permission on page load
No browser errors logged to the console
Allows users to paste into password fields
Avoids deprecated APIs
Avoids Application Cache
Displays images with correct aspect ratio
Avoids requesting the notification permission on page load
Page has the HTML doctype
Properly defines charset
iknow.jp Mobile Progressive Web App
46/100
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
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
PWA Optimized
Manifest doesn't have a maskable icon
Does not provide a valid `apple-touch-icon`
Is not configured for a custom splash screen
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 (5)
Redirects HTTP traffic to HTTPS
Page load is fast enough on mobile networks
Content is sized correctly for the viewport
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
iknow.jp Mobile Accessibility
89/100
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 (2)
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
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.
Links do not have a discernible name
Passed Audits (10)
Image elements have `[alt]` attributes
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`<html>` element has a valid value for its `[lang]` attribute
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-hidden="true"]` is not present on the document `<body>`
The page contains a heading, skip link, or landmark region
Heading elements appear in a sequentially-descending order
`<html>` element has a `[lang]` attribute
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Document has a `<title>` element
Mobile Usability
98/100
These checks validate how easily a visitor can use iknow.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
62/100
These checks analyze the performance of iknow.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 (6)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Enable compression
Leverage browser caching
Optimize images
Minify HTML
Minify JavaScript
Passed Audits (4)
Avoid landing page redirects
Reduce server response time
Minify CSS
Prioritize visible content
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