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dantri.com.vn Mobile Performance
16/100
These metrics represent real-world Chrome users experience viewing dantri.com.vn 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
Cumulative Layout Shift
First Input Delay
First Contentful Paint
Largest Contentful Paint
Metrics
Total Blocking Time0/100 3,470 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Largest Contentful Paint0/100 13.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index0/100 26.5 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive0/100 39.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift38/100 0.31
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
First Contentful Paint92/100 2.2 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Should Fix (21)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Defer offscreen images
Potential savings of 6,231 KiB
31,800 ms
Serve images in next-gen formats
Potential savings of 2,408 KiB
13,560 ms
Use video formats for animated content
Potential savings of 1,569 KiB
8,580 ms
Remove unused JavaScript
Potential savings of 726 KiB
6,450 ms
Preload key requests
Potential savings of 6,330 ms
6,330 ms
Remove unused CSS
Potential savings of 89 KiB
450 ms
Reduce initial server response time
Root document took 930 ms
332 ms
Efficiently encode images
Potential savings of 75 KiB
300 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 380 ms
Ensure text remains visible during webfont load
Avoid `document.write()`
Avoid enormous network payloads
Total size was 8,859 KiB
Minimize main-thread work
15.4 s
Serve static assets with an efficient cache policy
152 resources found
Reduce JavaScript execution time
7.7 s
Avoid an excessive DOM size
1,924 elements
Avoid chaining critical requests
3 chains found
Avoid large layout shifts
5 elements found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
201 requests • 8,859 KiB
Avoid long main-thread tasks
20 long tasks found
Passed Audits (8)
Preconnect to required origins
Minify CSS
Eliminate render-blocking resources
Avoid multiple page redirects
Potential savings of 630 ms
Properly size images
Uses passive listeners to improve scrolling performance
Minify JavaScript
Enable text compression
Potential savings of 5 KiB
dantri.com.vn Mobile 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 (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
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
96% appropriately sized tap targets
Passed Audits (12)
Links have descriptive text
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Page has successful HTTP status code
Document has a meta description
Document uses legible font sizes
99.88% legible text
Document avoids plugins
robots.txt is valid
Document has a valid `rel=canonical`
Links are crawlable
Document has a valid `hreflang`
Document has a `<title>` element
Page isn’t blocked from indexing
dantri.com.vn Mobile Best Practices
62/100
These checks highlight opportunities to improve the overall code health of dantri.com.vn 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 (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
User Experience
Serves images with low resolution
Passed Audits (9)
Avoids requesting the geolocation permission on page load
Properly defines charset
Page has the HTML doctype
Avoids Application Cache
Detected JavaScript libraries
Avoids deprecated APIs
Avoids requesting the notification permission on page load
Allows users to paste into password fields
Displays images with correct aspect ratio
dantri.com.vn Mobile Progressive Web App
21/100
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)
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 39.5 s
Current page does not respond with a 200 when offline
PWA Optimized
Is not configured for a custom splash screen
Does not provide a valid `apple-touch-icon`
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Installable
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
1 insecure request found
Passed Audits (4)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Contains some content when JavaScript is not available
dantri.com.vn Mobile 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 (6)
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
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.
Image elements do not have `[alt]` attributes
`<frame>` or `<iframe>` elements do not have a title
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Passed Audits (22)
`[role]` values are valid
No element has a `[tabindex]` value greater than 0
`[aria-*]` attributes are valid and not misspelled
The page contains a heading, skip link, or landmark region
`<video>` elements contain a `<track>` element with `[kind="captions"]`
`[aria-hidden="true"]` elements do not contain focusable descendents
`[aria-*]` attributes have valid values
`[id]` attributes on active, focusable elements are unique
Buttons have an accessible name
ARIA IDs are unique
`<video>` elements contain a `<track>` element with `[kind="description"]`
`[role]`s are contained by their required parent element
`[aria-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`<html>` element has a `[lang]` attribute
`[role]`s have all required `[aria-*]` attributes
`<html>` element has a valid value for its `[lang]` attribute
Document has a `<title>` element
`[lang]` attributes have a valid value
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Mobile Usability
60/100
These checks validate how easily a visitor can use dantri.com.vn 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 (5)
Use legible font sizes
Size tap targets appropriately
Configure the viewport
Avoid plugins
Size content to viewport
Passed Audits (1)
Avoid app install interstitials that hide content
Mobile Speed
45/100
These checks analyze the performance of dantri.com.vn 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 (4)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Optimize images
Minify JavaScript
Passed Audits (6)
Avoid landing page redirects
Enable compression
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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