Chemnet.ru Site Title

?îðòàë ôóíäàìåíòàëüíîãî õèìè÷åñêîãî îáðàçîâàíèÿ Ðîññèè. Íàóêà. Îáðàçîâàíèå. Òåõíîëîãèè.

Chemnet.ru Meta Description

Õèìè÷åñêàÿ èíôîðìàöèÿ Ðîññèè. Íàóêà. Îáðàçîâàíèå. Òåõíîëîãèè.

Chemnet.ru Test Results

Chemnet.ru Mobile Performance: 26/100
Quick overview:
Time to Interactive
17.3 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Max Potential First Input Delay
570 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Reduce unused JavaScript
Potential savings of 162 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Avoid multiple page redirects
Potential savings of 630 ms
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Largest Contentful Paint element
17,050 ms
This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint element
Reduce unused CSS
Potential savings of 36 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
Reduce JavaScript execution time
2.1 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
Avoid an excessive DOM size
1,504 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows. Learn how to avoid an excessive DOM size.
Minify JavaScript
Potential savings of 8 KiB
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Reduce the impact of third-party code
Third-party code blocked the main thread for 840 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading. Learn how to minimize third-party impact.
Minimize main-thread work
7.2 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work
Avoid large layout shifts
3 layout shifts found
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Ensure text remains visible during webfont load
Leverage the `font-display` CSS feature to ensure text is user-visible while webfonts are loading. Learn more about `font-display`.
Avoid serving legacy JavaScript to modern browsers
Potential savings of 0 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn how to use modern JavaScript
Serve static assets with an efficient cache policy
69 resources found
A long cache lifetime can speed up repeat visits to your page. Learn more about efficient cache policies.
Avoid enormous network payloads
Total size was 8,553 KiB
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Minify CSS
Potential savings of 2 KiB
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Properly size images
Potential savings of 17 KiB
Serve images that are appropriately-sized to save cellular data and improve load time. Learn how to size images.
Efficiently encode images
Potential savings of 17 KiB
Optimized images load faster and consume less cellular data. Learn how to efficiently encode images.
Serve images in next-gen formats
Potential savings of 20 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. Learn more about modern image formats.

Chemnet.ru Mobile SEO: 83/100
Quick overview:
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Chemnet.ru Mobile Best Practices: 72/100
Quick overview:
Trust and Safety
Does not use HTTPS
21 insecure requests found
All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.
Browser Compatibility
Page lacks the HTML doctype, thus triggering quirks-mode
Specifying a doctype prevents the browser from switching to quirks-mode. Learn more about the doctype declaration. Document must contain a doctype
General
Browser errors were logged to the console
Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit
Issues were logged in the `Issues` panel in Chrome Devtools
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Missing source maps for large first-party JavaScript
Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.
Chemnet.ru Mobile Accessibility: 71/100
Quick overview:
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.
Links do not have a discernible name
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
List items (`<li>`) are not contained within `<ul>`, `<ol>` or `<menu>` parent elements.
Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.
Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Best practices
These items highlight common accessibility best practices.
Touch targets do not have sufficient size or spacing.
Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.
Similar sites
Similar tests
www.chemnet.com
www.chemnet.net
www.chemnet.org
www.chemnet.info
www.chemnet.biz
www.chemnet.us
www.chemnet.mobi
www.hemnet.ru
www.chemnet.ru
www.xhemnet.ru
www.cxhemnet.ru
www.xchemnet.ru
www.dhemnet.ru
www.cdhemnet.ru
www.dchemnet.ru
www.fhemnet.ru
www.cfhemnet.ru
www.fchemnet.ru
www.vhemnet.ru
www.cvhemnet.ru
www.vchemnet.ru
www.cemnet.ru
www.cbemnet.ru
www.chbemnet.ru
www.cbhemnet.ru
www.cgemnet.ru
www.chgemnet.ru
www.cghemnet.ru
www.cyemnet.ru
www.chyemnet.ru
www.cyhemnet.ru
www.cuemnet.ru
www.chuemnet.ru
www.cuhemnet.ru
www.cjemnet.ru
www.chjemnet.ru
www.cjhemnet.ru
www.cnemnet.ru
www.chnemnet.ru
www.cnhemnet.ru
www.chmnet.ru
www.chwmnet.ru
www.chewmnet.ru
www.chwemnet.ru
www.chsmnet.ru
www.chesmnet.ru
www.chsemnet.ru
www.chdmnet.ru
www.chedmnet.ru
www.chdemnet.ru
www.chrmnet.ru
www.chermnet.ru
www.chremnet.ru
www.chenet.ru
www.chennet.ru
www.chemnnet.ru
www.chenmnet.ru
www.chejnet.ru
www.chemjnet.ru
www.chejmnet.ru
www.cheknet.ru
www.chemknet.ru
www.chekmnet.ru
www.chemet.ru
www.chembet.ru
www.chemnbet.ru
www.chembnet.ru
www.chemhet.ru
www.chemnhet.ru
www.chemhnet.ru
www.chemjet.ru
www.chemnjet.ru
www.chemmet.ru
www.chemnmet.ru
www.chemmnet.ru
www.chemnt.ru
www.chemnwt.ru
www.chemnewt.ru
www.chemnwet.ru
www.chemnst.ru
www.chemnest.ru
www.chemnset.ru
www.chemndt.ru
www.chemnedt.ru
www.chemndet.ru
www.chemnrt.ru
www.chemnert.ru
www.chemnret.ru
www.chemne.ru
www.chemner.ru
www.chemnetr.ru
www.chemnef.ru
www.chemnetf.ru
www.chemneft.ru
www.chemneg.ru
www.chemnetg.ru
www.chemnegt.ru
www.chemney.ru
www.chemnety.ru
www.chemneyt.ru
Last Tested: