Cna.com.tw 中央社 CNA
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cna.com.tw Mobile Performance
39/100
These metrics represent real-world Chrome users experience viewing cna.com.tw 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
Cumulative Layout Shift
First Contentful Paint
Metrics
Largest Contentful Paint10/100 6.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Total Blocking Time11/100 1,210 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift33/100 0.342
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Speed Index58/100 5.3 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive60/100 6.4 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
First Contentful Paint96/100 1.9 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Should Fix (12)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 141 KiB
1,350 ms
Reduce initial server response time
Root document took 950 ms
351 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Reduce the impact of third-party code
Third-party code blocked the main thread for 260 ms
Serve static assets with an efficient cache policy
10 resources found
Avoid an excessive DOM size
1,526 elements
Minimize main-thread work
4.2 s
JavaScript execution time
1.0 s
Avoid chaining critical requests
1 chain found
Avoid long main-thread tasks
12 long tasks found
Avoid large layout shifts
5 elements found
Keep request counts low and transfer sizes small
27 requests • 536 KiB
Largest Contentful Paint element
1 element found
Passed Audits (17)
Uses passive listeners to improve scrolling performance
Serve images in next-gen formats
Potential savings of 67 KiB
All text remains visible during webfont loads
Minify JavaScript
Avoids enormous network payloads
Total size was 536 KiB
Defer offscreen images
Eliminate render-blocking resources
Avoids `document.write()`
Properly size images
Preconnect to required origins
Preload key requests
Minify CSS
Efficiently encode images
Potential savings of 11 KiB
Use video formats for animated content
Enable text compression
Avoid multiple page redirects
Potential savings of 630 ms
Remove unused CSS
Potential savings of 11 KiB
cna.com.tw 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
83% appropriately sized tap targets
Passed Audits (13)
Document has a meta description
Page isn’t blocked from indexing
Document has a valid `hreflang`
Document has a `<title>` element
Document uses legible font sizes
100% legible text
Page has successful HTTP status code
Links have descriptive text
Document avoids plugins
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Image elements have `[alt]` attributes
Document has a valid `rel=canonical`
robots.txt is valid
Links are crawlable
cna.com.tw Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of cna.com.tw 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 (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
Page has the HTML doctype
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
Displays images with correct aspect ratio
Links to cross-origin destinations are safe
Avoids deprecated APIs
Serves images with appropriate resolution
Detected JavaScript libraries
cna.com.tw 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)
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
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.
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Passed Audits (5)
Page load is fast enough on mobile networks
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
cna.com.tw Mobile Accessibility
97/100
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 (1)
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-*]` attributes have valid values
Heading elements appear in a sequentially-descending order
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Links have a discernible name
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Document has a `<title>` element
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
Form elements have associated labels
Background and foreground colors have a sufficient contrast ratio
Image elements have `[alt]` attributes
`[aria-*]` attributes are valid and not misspelled
Mobile Usability
99/100
These checks validate how easily a visitor can use cna.com.tw 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
74/100
These checks analyze the performance of cna.com.tw 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 (5)
Avoid landing page redirects
Optimize images
Leverage browser caching
Enable compression
Minify CSS
Passed Audits (5)
Reduce server response time
Minify HTML
Minify JavaScript
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Prioritize visible content
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