Cna.com.tw 中央社 CNA
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cna.com.tw Desktop Performance
69/100
These metrics represent real-world Chrome users experience viewing cna.com.tw 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
Speed Index34/100 2.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive59/100 4.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift69/100 0.174
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time71/100 240 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Largest Contentful Paint76/100 1.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint99/100 0.6 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Should Fix (18)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 380 KiB
650 ms
Reduce initial server response time
Root document took 1,030 ms
434 ms
Serve images in next-gen formats
Potential savings of 404 KiB
340 ms
Properly size images
Potential savings of 198 KiB
200 ms
Efficiently encode images
Potential savings of 171 KiB
140 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
Ensure text remains visible during webfont load
Avoid `document.write()`
Serve static assets with an efficient cache policy
22 resources found
Avoid an excessive DOM size
1,531 elements
Minimize main-thread work
3.6 s
Reduce JavaScript execution time
1.7 s
User Timing marks and measures
8 user timings
Avoid large layout shifts
5 elements found
Keep request counts low and transfer sizes small
144 requests • 2,025 KiB
Avoid chaining critical requests
1 chain found
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
10 long tasks found
Passed Audits (12)
Preconnect to required origins
Eliminate render-blocking resources
Enable text compression
Remove unused CSS
Potential savings of 12 KiB
Avoid multiple page redirects
Potential savings of 190 ms
Minify JavaScript
Preload key requests
Defer offscreen images
Minimize third-party usage
Third-party code blocked the main thread for 240 ms
Use video formats for animated content
Avoids enormous network payloads
Total size was 2,025 KiB
Minify CSS
cna.com.tw Desktop SEO
100/100
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.
Passed Audits (12)
Page has successful HTTP status code
Links have descriptive text
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a `<title>` element
Document avoids plugins
Links are crawlable
Document has a valid `rel=canonical`
Document has a valid `hreflang`
Image elements have `[alt]` attributes
Document has a meta description
Page isn’t blocked from indexing
robots.txt is valid
cna.com.tw Desktop Best Practices
77/100
These checks highlight opportunities to improve the overall code health of cna.com.tw 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 (3)
Trust and Safety
Does not use HTTPS
1 insecure request found
Includes front-end JavaScript libraries with known security vulnerabilities
2 vulnerabilities detected
General
Browser errors were logged to the console
Passed Audits (11)
Properly defines charset
Avoids Application Cache
Avoids requesting the geolocation permission on page load
Avoids deprecated APIs
Displays images with correct aspect ratio
Links to cross-origin destinations are safe
Avoids requesting the notification permission on page load
Detected JavaScript libraries
Serves images with appropriate resolution
Page has the HTML doctype
Allows users to paste into password fields
cna.com.tw Desktop Progressive Web App
19/100
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)
PWA Optimized
Is not configured for a custom splash screen
Manifest doesn't have a maskable icon
Does not provide a valid `apple-touch-icon`
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
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 17.9 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Passed Audits (3)
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
cna.com.tw Desktop Accessibility
94/100
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)
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
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>`).
Passed Audits (15)
The page contains a heading, skip link, or landmark region
`[aria-hidden="true"]` is not present on the document `<body>`
Document has a `<title>` element
`<html>` element has a valid value for its `[lang]` attribute
Heading elements appear in a sequentially-descending order
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Image elements have `[alt]` attributes
Form elements have associated labels
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-*]` attributes match their roles
`<frame>` or `<iframe>` elements have a title
`<html>` element has a `[lang]` attribute
Background and foreground colors have a sufficient contrast ratio
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Desktop Speed
48/100
These checks analyze the performance of cna.com.tw 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)
Optimize images
Avoid landing page redirects
Prioritize visible content
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Enable compression
Minify CSS
Passed Audits (3)
Reduce server response time
Minify HTML
Minify JavaScript
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