Academic.ru Словари и энциклопедии на Академике
Словари и энциклопедии на Академике
academic.ru Desktop Performance
56/100
These metrics represent real-world Chrome users experience viewing academic.ru 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
Cumulative Layout Shift19/100 0.47
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Speed Index20/100 3.3 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Total Blocking Time51/100 340 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Largest Contentful Paint58/100 2.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive68/100 3.6 s
Time to interactive is the amount of time it takes for the page to become fully interactive. 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 (17)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 637 KiB
440 ms
Reduce initial server response time
Root document took 870 ms
267 ms
Serve images in next-gen formats
Potential savings of 70 KiB
70 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
Avoid `document.write()`
Does not use passive listeners to improve scrolling performance
Reduce the impact of third-party code
Third-party code blocked the main thread for 480 ms
Serve static assets with an efficient cache policy
28 resources found
Avoid an excessive DOM size
1,495 elements
Minimize main-thread work
3.3 s
Reduce JavaScript execution time
1.8 s
Keep request counts low and transfer sizes small
131 requests • 1,658 KiB
Largest Contentful Paint element
1 element found
User Timing marks and measures
18 user timings
Avoid long main-thread tasks
10 long tasks found
Avoid large layout shifts
5 elements found
Avoid chaining critical requests
8 chains found
Passed Audits (13)
Efficiently encode images
Potential savings of 43 KiB
Avoid multiple page redirects
Potential savings of 190 ms
Defer offscreen images
Properly size images
Enable text compression
Potential savings of 51 KiB
Preload key requests
Avoids enormous network payloads
Total size was 1,658 KiB
Eliminate render-blocking resources
Potential savings of 30 ms
Minify CSS
Preconnect to required origins
Minify JavaScript
Use video formats for animated content
Remove unused CSS
Potential savings of 17 KiB
academic.ru 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 (11)
Links have descriptive text
Document has a `<title>` element
Image elements have `[alt]` attributes
Page isn’t blocked from indexing
robots.txt is valid
Document has a meta description
Document avoids plugins
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a valid `hreflang`
Page has successful HTTP status code
Links are crawlable
academic.ru Desktop Best Practices
62/100
These checks highlight opportunities to improve the overall code health of academic.ru 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)
User Experience
Displays images with incorrect aspect ratio
General
Browser errors were logged to the console
Trust and Safety
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
3 vulnerabilities detected
Does not use HTTPS
1 insecure request found
Passed Audits (9)
Page has the HTML doctype
Allows users to paste into password fields
Detected JavaScript libraries
Avoids Application Cache
Serves images with appropriate resolution
Avoids deprecated APIs
Avoids requesting the notification permission on page load
Properly defines charset
Avoids requesting the geolocation permission on page load
academic.ru 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)
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 16.5 s
Current page does not respond with a 200 when offline
PWA Optimized
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Does not provide a valid `apple-touch-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 (3)
Redirects HTTP traffic to HTTPS
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
academic.ru Desktop Accessibility
90/100
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 (3)
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>`).
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.
`<frame>` or `<iframe>` elements do not have a title
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (16)
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.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
The page contains a heading, skip link, or landmark region
Document has a `<title>` element
Image elements have `[alt]` attributes
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Links have a discernible name
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
Form elements have associated labels
`<html>` element has a valid value for its `[lang]` attribute
`[aria-hidden="true"]` elements do not contain focusable descendents
`[id]` attributes on active, focusable elements are unique
Buttons have an accessible name
`<html>` element has a `[lang]` attribute
`[aria-hidden="true"]` is not present on the document `<body>`
Desktop Speed
81/100
These checks analyze the performance of academic.ru 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)
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Enable compression
Minify JavaScript
Minify HTML
Optimize images
Passed Audits (4)
Avoid landing page redirects
Reduce server response time
Minify CSS
Prioritize visible content
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