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rakuten-card.co.jp Desktop Performance
33/100
These metrics represent real-world Chrome users experience viewing rakuten-card.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
First Input Delay
First Contentful Paint
Largest Contentful Paint
Metrics
First Contentful Paint1/100 4.3 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Speed Index3/100 5.4 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint7/100 5.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive41/100 5.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift53/100 0.236
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time86/100 170 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. 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 1,946 KiB
880 ms
Properly size images
Potential savings of 1,955 KiB
750 ms
Defer offscreen images
Potential savings of 873 KiB
690 ms
Reduce initial server response time
Root document took 1,090 ms
486 ms
Avoid multiple page redirects
Potential savings of 380 ms
380 ms
Enable text compression
Potential savings of 329 KiB
310 ms
Eliminate render-blocking resources
Potential savings of 270 ms
270 ms
Remove unused CSS
Potential savings of 172 KiB
170 ms
Remove unused JavaScript
Potential savings of 174 KiB
80 ms
Efficiently encode images
Potential savings of 767 KiB
80 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Ensure text remains visible during webfont load
Avoid `document.write()`
Does not use passive listeners to improve scrolling performance
Serve static assets with an efficient cache policy
161 resources found
Avoid enormous network payloads
Total size was 5,642 KiB
Avoid an excessive DOM size
1,653 elements
Minimize main-thread work
3.0 s
Keep request counts low and transfer sizes small
278 requests • 5,642 KiB
Avoid long main-thread tasks
10 long tasks found
Avoid chaining critical requests
95 chains found
Largest Contentful Paint element
1 element found
Avoid large layout shifts
4 elements found
Passed Audits (7)
JavaScript execution time
0.8 s
Minify JavaScript
Potential savings of 5 KiB
Minify CSS
Potential savings of 17 KiB
Use video formats for animated content
Minimize third-party usage
Third-party code blocked the main thread for 230 ms
Preload key requests
Preconnect to required origins
rakuten-card.co.jp Desktop SEO
83/100
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 (10)
Document has a valid `rel=canonical`
Links have descriptive text
Document has a valid `hreflang`
Document has a meta description
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a `<title>` element
Document avoids plugins
Page has successful HTTP status code
Page isn’t blocked from indexing
robots.txt is valid
rakuten-card.co.jp Desktop Best Practices
62/100
These checks highlight opportunities to improve the overall code health of rakuten-card.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 (5)
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Does not use HTTPS
2 insecure requests found
Links to cross-origin destinations are unsafe
User Experience
Displays images with incorrect aspect ratio
General
Browser errors were logged to the console
Passed Audits (9)
Avoids requesting the geolocation permission on page load
Page has the HTML doctype
Properly defines charset
Serves images with appropriate resolution
Avoids deprecated APIs
Allows users to paste into password fields
Avoids Application Cache
Detected JavaScript libraries
Avoids requesting the notification permission on page load
rakuten-card.co.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)
Installable
Web app manifest does not meet the installability requirements
Does not use HTTPS
2 insecure requests found
Does not register a service worker that controls page and `start_url`
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.
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 25.5 s
Current page does not respond with a 200 when offline
Passed Audits (4)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
Redirects HTTP traffic to HTTPS
Provides a valid `apple-touch-icon`
rakuten-card.co.jp Desktop Accessibility
83/100
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)
Tables and lists
These are opportunities to to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
List items (`<li>`) are not contained within `<ul>` or `<ol>` parent elements.
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.
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.
Form elements do not have associated labels
Image elements do not have `[alt]` attributes
Passed Audits (22)
The page contains a heading, skip link, or landmark region
`<html>` element has a valid value for its `[lang]` attribute
`<html>` element has a `[lang]` attribute
ARIA IDs are unique
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Buttons have an accessible name
Document has a `<title>` element
`[role]`s are contained by their required parent element
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Links have a discernible name
`[id]` attributes on active, focusable elements are unique
Definition list items are wrapped in `<dl>` elements
No element has a `[tabindex]` value greater than 0
`[role]`s have all required `[aria-*]` attributes
`[aria-*]` attributes match their roles
`[aria-*]` attributes are valid and not misspelled
Heading elements appear in a sequentially-descending order
`[role]` values are valid
`[aria-hidden="true"]` elements do not contain focusable descendents
`[aria-*]` attributes have valid values
`[aria-hidden="true"]` is not present on the document `<body>`
Desktop Speed
58/100
These checks analyze the performance of rakuten-card.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 (7)
Enable compression
Optimize images
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Minify JavaScript
Minify CSS
Minify HTML
Passed Audits (3)
Avoid landing page redirects
Reduce server response time
Prioritize visible content
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