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bab.la Mobile Performance
44/100
These metrics represent real-world Chrome users experience viewing bab.la 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
First Contentful Paint
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Total Blocking Time16/100 1,070 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive20/100 11.3 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index35/100 6.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint63/100 3.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint76/100 3.0 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0.018
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.
Serve images in next-gen formats
Potential savings of 170 KiB
1,200 ms
Efficiently encode images
Potential savings of 124 KiB
750 ms
Remove unused JavaScript
Potential savings of 104 KiB
570 ms
Remove unused CSS
Potential savings of 27 KiB
150 ms
Reduce initial server response time
Root document took 710 ms
107 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
Reduce the impact of third-party code
Third-party code blocked the main thread for 570 ms
Does not use passive listeners to improve scrolling performance
Avoid `document.write()`
Minimize main-thread work
6.7 s
Reduce JavaScript execution time
3.4 s
Serve static assets with an efficient cache policy
26 resources found
Avoids an excessive DOM size
766 elements
Avoid chaining critical requests
10 chains found
Avoid long main-thread tasks
20 long tasks found
User Timing marks and measures
8 user timings
Largest Contentful Paint element
1 element found
Avoid large layout shifts
1 element found
Keep request counts low and transfer sizes small
73 requests • 1,115 KiB
Passed Audits (11)
Use video formats for animated content
Avoids enormous network payloads
Total size was 1,115 KiB
Eliminate render-blocking resources
Potential savings of 0 ms
Defer offscreen images
Properly size images
Preload key requests
Preconnect to required origins
Enable text compression
Avoid multiple page redirects
Potential savings of 630 ms
Minify JavaScript
Minify CSS
bab.la Mobile SEO
90/100
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)
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
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
95% appropriately sized tap targets
Passed Audits (10)
robots.txt is valid
Page isn’t blocked from indexing
Document has a meta description
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a `<title>` element
Document has a valid `hreflang`
Page has successful HTTP status code
Document avoids plugins
Links have descriptive text
Document uses legible font sizes
98.06% legible text
bab.la Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of bab.la 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
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
2 vulnerabilities detected
Does not use HTTPS
1 insecure request found
Passed Audits (11)
Detected JavaScript libraries
Avoids requesting the geolocation permission on page load
Serves images with appropriate resolution
Displays images with correct aspect ratio
Properly defines charset
Allows users to paste into password fields
Page has the HTML doctype
Avoids Application Cache
Avoids deprecated APIs
No browser errors logged to the console
Avoids requesting the notification permission on page load
bab.la Mobile Progressive Web App
25/100
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 at 11.3 s
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
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.
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 (5)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Provides a valid `apple-touch-icon`
Content is sized correctly for the viewport
Redirects HTTP traffic to HTTPS
Contains some content when JavaScript is not available
bab.la 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 (2)
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (22)
Buttons have an accessible name
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
The page contains a heading, skip link, or landmark region
`[aria-hidden="true"]` elements do not contain focusable descendents
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`[role]`s have all required `[aria-*]` attributes
`<frame>` or `<iframe>` elements have a title
ARIA IDs are unique
`[role]`s are contained by their required parent element
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Document has a `<title>` element
`[aria-*]` attributes are valid and not misspelled
Links have a discernible name
`[role]` values are valid
`[aria-*]` attributes have valid values
Form elements have associated labels
`[aria-hidden="true"]` is not present on the document `<body>`
`[aria-*]` attributes match their roles
No element has a `[tabindex]` value greater than 0
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Mobile Usability
99/100
These checks validate how easily a visitor can use bab.la 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
70/100
These checks analyze the performance of bab.la 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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