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vnexpress.net Desktop Performance
70/100
These metrics represent real-world Chrome users experience viewing vnexpress.net 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
First Input Delay
First Contentful Paint
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Speed Index18/100 3.5 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive57/100 4.1 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Largest Contentful Paint71/100 1.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Total Blocking Time85/100 180 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
First Contentful Paint98/100 0.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0.013
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (19)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 529 KiB
620 ms
Serve images in next-gen formats
Potential savings of 332 KiB
350 ms
Properly size images
Potential savings of 274 KiB
330 ms
Efficiently encode images
Potential savings of 213 KiB
180 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
Does not use passive listeners to improve scrolling performance
Reduce the impact of third-party code
Third-party code blocked the main thread for 280 ms
Avoid `document.write()`
Serve static assets with an efficient cache policy
46 resources found
Minimize main-thread work
7.3 s
Avoid an excessive DOM size
2,058 elements
Reduce JavaScript execution time
4.0 s
Avoid enormous network payloads
Total size was 3,360 KiB
User Timing marks and measures
8 user timings
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
5 chains found
Keep request counts low and transfer sizes small
289 requests • 3,360 KiB
Avoid large layout shifts
4 elements found
Avoid long main-thread tasks
9 long tasks found
Passed Audits (11)
Minify CSS
Initial server response time was short
Root document took 350 ms
Enable text compression
Potential savings of 51 KiB
Minify JavaScript
Potential savings of 6 KiB
Remove unused CSS
Potential savings of 76 KiB
Preconnect to required origins
Use video formats for animated content
Eliminate render-blocking resources
Preload key requests
Avoid multiple page redirects
Potential savings of 540 ms
Defer offscreen images
Potential savings of 32 KiB

vnexpress.net Desktop SEO
92/100
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)
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (11)
robots.txt is valid
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Page has successful HTTP status code
Page isn’t blocked from indexing
Document has a valid `hreflang`
Document has a meta description
Document has a valid `rel=canonical`
Links have descriptive text
Image elements have `[alt]` attributes
Document has a `<title>` element
Document avoids plugins

vnexpress.net Desktop Best Practices
0/100
These checks highlight opportunities to improve the overall code health of vnexpress.net 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
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Does not use HTTPS
1 insecure request found
General
Browser errors were logged to the console
Browser Compatibility
Properly defines charset
Passed Audits (9)
Serves images with appropriate resolution
Displays images with correct aspect ratio
Page has the HTML doctype
Allows users to paste into password fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Avoids Application Cache
Avoids deprecated APIs
Detected JavaScript libraries

vnexpress.net 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)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 28.0 s
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
PWA Optimized
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Installable
Web app manifest does not meet the installability requirements
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Passed Audits (4)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
Provides a valid `apple-touch-icon`
Redirects HTTP traffic to HTTPS

vnexpress.net Desktop Accessibility
86/100
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.
Form elements do not have associated labels
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (17)
Links have a discernible name
`<html>` element has a `[lang]` attribute
Buttons have an accessible name
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[id]` attributes on active, focusable elements are unique
`[aria-hidden="true"]` elements do not contain focusable descendents
`<html>` element has a valid value for its `[lang]` attribute
`<frame>` or `<iframe>` elements have a title
The page contains a heading, skip link, or landmark region
Heading elements appear in a sequentially-descending order
`[aria-hidden="true"]` is not present on the document `<body>`
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Image elements have `[alt]` attributes
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Document has a `<title>` element

Desktop Speed
85/100
These checks analyze the performance of vnexpress.net 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 (6)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Enable compression
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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