supermemo.com Website Information

Daily Unique Visits: 15,105

Daily Page Views: 90,630

Income Per Day: $181

Estimated Value: $130,320

supermemo.com is registered under .COM top-level domain. Please check other sites in .COM zone.

No name server records were found.

and is probably hosted by E24 Sp. z o.o.. See the full list of other websites hosted by E24 Sp. z o.o..

The highest website supermemo.com position in Alexa rank database was 22391 and the lowest rank position was 974373. Current position of supermemo.com in Alexa rank database is 94953.

Desktop speed score of supermemo.com (45/100) is better than the results of 19.01% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of supermemo.com (93/100) is better than the results of 34.93% of other sites and means that the page is mobile-friendly.

Mobile speed score of supermemo.com (62/100) is better than the results of 59.44% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

supermemo.com Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

supermemo.com whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

Domain Name: SUPERMEMO.COM
Registry Domain ID: 109430_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.ovh.com
Registrar URL: http://www.ovh.com
Updated Date: 2023-11-13T05:44:09Z
Creation Date: 1997-01-08T05:00:00Z
Registry Expiry Date: 2025-01-07T05:00:00Z
Registrar: OVH sas
Registrar IANA ID: 433
Registrar Abuse Contact Email: abuse@ovh.net
Registrar Abuse Contact Phone: +33.972101007
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1-09.AZURE-DNS.COM
Name Server: NS2-09.AZURE-DNS.NET
Name Server: NS3-09.AZURE-DNS.ORG
Name Server: NS4-09.AZURE-DNS.INFO
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-10-11T07:11:46Z

supermemo.com server information

Servers Location

supermemo.com desktop page speed rank

Last tested: 2018-05-04

Desktop Speed Bad

45/100

supermemo.com Desktop Speed Test Quick Summary

priority - 62Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 603.6KiB (50% reduction).

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priority - 36Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 352.5KiB (83% reduction).

Compressing https://www-test.supermemo.com/assets/sprites-common.svg could save 351.4KiB (84% reduction).
Compressing https://www.supermemo.com/smcom/scripts/landing.js?568289451301 could save 532B (57% reduction).
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priority - 14Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://app.supermemo.com/assets/logo.svg (expiration not specified)
https://beta.supermemo.com/smcom/fonts/TitilliumText25L004.ttf (expiration not specified)
https://beta.supermemo.com/smcom/fonts/TitilliumText25L004.woff (expiration not specified)
https://www.supermemo.com/smcom/fonts/TitilliumText25L002.woff (expiration not specified)
https://www.supermemo.com/smcom/fonts/TitilliumText25L004.woff (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-5P4GKN (15 minutes)
https://app2.emlgrid.com/static/sm.js (60 minutes)
https://mc.yandex.ru/metrika/watch.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://www.supermemo.com/smcom/images/9-3-1-en.png (24 hours)
https://www.supermemo.com/smcom/images/arch-arrow.png (24 hours)
https://www.supermemo.com/smcom/images/award-2.png (24 hours)
https://www.supermemo.com/smcom/images/award-3.png (24 hours)
https://www.supermemo.com/smcom/images/award-4.png (24 hours)
https://www.supermemo.com/smcom/images/bg.jpg (24 hours)
https://www.supermemo.com/smcom/images/big_arrow_bottom.png (24 hours)
https://www.supermemo.com/smcom/images/computer-gray.png (24 hours)
https://www.supermemo.com/smcom/images/devices-gray.png (24 hours)
https://www.supermemo.com/smcom/images/partners-Darakwon.png (24 hours)
https://www.supermemo.com/smcom/images/partners-Gribaudo.png (24 hours)
https://www.supermemo.com/smcom/images/partners-Hueber.png (24 hours)
https://www.supermemo.com/smcom/images/partners-IOA.png (24 hours)
https://www.supermemo.com/smcom/images/partners-Larousse.png (24 hours)
https://www.supermemo.com/smcom/images/partners-LinguaFrame.png (24 hours)
https://www.supermemo.com/smcom/images/partners-MACENTA.png (24 hours)
https://www.supermemo.com/smcom/images/partners-Ranok.png (24 hours)
https://www.supermemo.com/smcom/images/partners-SpeakMandarin.png (24 hours)
https://www.supermemo.com/smcom/images/partners-UES.png (24 hours)
https://www.supermemo.com/smcom/images/rewards.png (24 hours)
https://www.supermemo.com/smcom/images/tablet-white.png (24 hours)
https://www.supermemo.com/smcom/scripts/landing.js?568289451301 (24 hours)

priority - 9Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://supermemo.com/
https://supermemo.com/
https://www.supermemo.com/

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 10 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://www.supermemo.com/misc/jquery.js?v=1.4.4
https://www.supermemo.com/misc/jquery.once.js?v=1.2
https://www.supermemo.com/misc/drupal.js?p6cfe1
https://www.supermemo.com/sites/all/modules/superm…memo_reading.js?p6cfe1
https://www.supermemo.com/sites/all/modules/superm…rmemo_tweaks.js?p6cfe1
https://www.supermemo.com/sites/default/files/lang…LFNmX0dlupw0.js?p6cfe1
https://www.supermemo.com/sites/all/modules/dhtml_menu/dhtml_menu.js?p6cfe1
https://www.supermemo.com/sites/all/themes/smcom2/…talog_tweaks.js?p6cfe1
https://www.supermemo.com/sites/all/themes/smcom2/…oduct_tweaks.js?p6cfe1
https://www.supermemo.com/sites/all/themes/smcom2/js/other_tweaks.js?p6cfe1

Optimize CSS Delivery of the following:

https://www.supermemo.com/sites/default/files/css/…_kBNgznNUWmTWcnfoE.css
https://www.supermemo.com/sites/default/files/css/…gLnVz-e8WXOszneMW4.css
https://www.supermemo.com/sites/default/files/css/…Fv-rOqDFI_2ZWanUs4.css
https://www.supermemo.com/sites/default/files/css/…O7TCqnwYkpf7WUj1Oc.css
https://www.supermemo.com/smcom/style/style.css?68552026526

priority - 4Reduce server response time

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 9.6KiB (53% reduction).

Minifying https://www.supermemo.com/misc/drupal.js?p6cfe1 could save 3.1KiB (63% reduction) after compression.
Minifying https://www.supermemo.com/sites/all/modules/dhtml_menu/dhtml_menu.js?p6cfe1 could save 2.6KiB (63% reduction) after compression.
Minifying https://www.supermemo.com/sites/all/modules/superm…rmemo_tweaks.js?p6cfe1 could save 1.4KiB (45% reduction) after compression.
Minifying https://www.supermemo.com/sites/all/themes/smcom2/…talog_tweaks.js?p6cfe1 could save 829B (43% reduction) after compression.
Minifying https://www.supermemo.com/misc/jquery.once.js?v=1.2 could save 816B (76% reduction) after compression.
Minifying https://www.supermemo.com/sites/all/themes/smcom2/…oduct_tweaks.js?p6cfe1 could save 306B (50% reduction).
Minifying https://www.supermemo.com/smcom/scripts/landing.js?568289451301 could save 293B (32% reduction).
Minifying https://www.supermemo.com/sites/all/themes/smcom2/js/other_tweaks.js?p6cfe1 could save 159B (22% reduction) after compression.
Minifying https://www.supermemo.com/sites/all/modules/superm…memo_reading.js?p6cfe1 could save 136B (23% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 1.3KiB (26% reduction).

Minifying https://www.supermemo.com/smcom/style/style-2.css?921511164400 could save 1.1KiB (29% reduction) after compression.
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supermemo.com Desktop Resource Breakdown

Total Resources	63
Number of Hosts	12
Static Resources	50
JavaScript Resources	19
CSS Resources	6

supermemo.com mobile page speed rank

Last tested: 2019-06-15

Mobile Speed Bad

62/100

supermemo.com Mobile Speed Test Quick Summary

priority - 34Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://supermemo.com/
https://supermemo.com/
https://www.supermemo.com/

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

https://www.supermemo.com/styles.613bd57a30122d276e02.css

priority - 8Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

64.6KiB of the HTML response was required to render the above-the-fold content. This requires 3 network round-trips. Prioritize the above-the-fold content so that it can be rendered with only the first 2 round-trips' worth of HTML.

Only about 6% of the final above-the-fold content could be rendered with the HTML delivered within 2 round-trips.

Click to see the screenshot with 2 round trips:

priority - 8Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://www.googletagmanager.com/gtm.js?id=GTM-PDKTG5L (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/321253…5897?v=2.8.52&r=stable (20 minutes)
https://connect.facebook.net/signals/plugins/inferredEvents.js?v=2.8.52 (20 minutes)
https://app2.emlgrid.com/static/sm.js (60 minutes)
https://app2.salesmanago.pl/static/chunk/sm_war.js (60 minutes)
https://mc.yandex.ru/metrika/advert.gif (60 minutes)
https://mc.yandex.ru/metrika/watch.js (60 minutes)
https://www.supermemo.com/assets/images/frontpage/awards/award-2.png (24 hours)
https://www.supermemo.com/assets/images/frontpage/awards/award-3.png (24 hours)
https://www.supermemo.com/assets/images/frontpage/awards/award-4.png (24 hours)

priority - 5Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 50.6KiB (78% reduction).

Minifying https://www.supermemo.com/ could save 50.6KiB (78% reduction) after compression.

priority - 1Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 8.7KiB (48% reduction).

Compressing https://www.supermemo.com/assets/images/frontpage/awards/award-3.png could save 3.1KiB (51% reduction).
Compressing https://www.supermemo.com/assets/images/frontpage/awards/award-2.png could save 3KiB (50% reduction).
Compressing https://www.supermemo.com/assets/images/frontpage/awards/award-4.png could save 2.5KiB (42% reduction).

priority - 0Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 646B (85% reduction).

Minifying https://connect.facebook.net/signals/plugins/inferredEvents.js?v=2.8.52 could save 646B (85% reduction) after compression.

supermemo.com Mobile Resource Breakdown

Total Resources	52
Number of Hosts	9
Static Resources	19
JavaScript Resources	18
CSS Resources	1

supermemo.com mobile page usability

Last tested: 2019-06-15

Mobile Usability Good

93/100

supermemo.com Mobile Usability Test Quick Summary

priority - 6Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="/en/articles/history" class="bigger">The true histo…Wozniak, 2018</a> is close to 1 other tap targets.
The tap target <a href="https://superm…rgetting_curve">Forgetting curve</a> and 19 others are close to other tap targets.

supermemo.com HTML validation

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Line: 6 Column: 5 - 109
"..."/"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0, user-scalable=no"> ..."

The “type” attribute is unnecessary for JavaScript resources.

Line: 3689 Column: 1 - 69
"...app-root> <script type="text/javascript" src="runtime.aa06ae41a2ab995fd7e8.js"></scri..." Line: 3689 Column: 79 - 149
"...></script><script type="text/javascript" src="polyfills.68db88af4594e5e77674.js"></scri..." Line: 3689 Column: 159 - 227
"...></script><script type="text/javascript" src="scripts.6ec78ab4bb43e0cb4969.js"></scri..." Line: 3689 Column: 237 - 308
"...></script><script type="text/javascript" src="worker-xml.0479842bd0c0691fb32c.js"></scri..." Line: 3689 Column: 318 - 390
"...></script><script type="text/javascript" src="worker-html.d19ff21fb82835f206ce.js"></scri..." Line: 3689 Column: 400 - 467
"...></script><script type="text/javascript" src="vendor.89c8ff3d9b17dbe89c9b.js"></scri..." Line: 3689 Column: 477 - 542
"...></script><script type="text/javascript" src="main.26c49dbcfd6ae16ff86c.js"></scri..." Line: 3691 Column: 1 - 31
".../script> <script type="text/javascript"> i..."

Errors

Attribute “ng-transition” not allowed on element “style” at this point.

Line: 11 Column: 63 - 92
"...6e02.css"><style ng-transition="my-app">a[_ngc..." Line: 16 Column: 570 - 599
"...*/</style><style ng-transition="my-app">.butto..." Line: 316 Column: 22126 - 22155
"...*/</style><style ng-transition="my-app">.butto..." Line: 639 Column: 22778 - 22807
"...*/</style><style ng-transition="my-app">.butto..." Line: 948 Column: 23206 - 23235
"...*/</style><style ng-transition="my-app">.butto..." Line: 1278 Column: 24166 - 24195
"...*/</style><style ng-transition="my-app">.butto..." Line: 1640 Column: 22 - 51
"... </script><style ng-transition="my-app">.butto..." Line: 2348 Column: 69018 - 69047
"...*/</style><style ng-transition="my-app">.butto..." Line: 2876 Column: 37238 - 37267
"...*/</style><style ng-transition="my-app">.butto..."

CSS: “width”: Parse Error.

Line: 256 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 262 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 265 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 268 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 271 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 274 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 556 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 562 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 565 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 568 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 571 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 574 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 879 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 885 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 888 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 891 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 894 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 897 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 1188 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 1194 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 1197 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 1200 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 1203 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 1206 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 1518 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 1524 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 1527 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 1530 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 1533 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 1536 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 1880 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 1886 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 1889 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 1892 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 1895 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 1898 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 2588 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 2594 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 2597 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 2600 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 2603 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 2606 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..." Line: 3116 Column: - 30
"...100% / (12 / 5)); } .sm-grid[_..." Line: 3122 Column: - 30
"...100% / (12 / 7)); } .sm-grid[_..." Line: 3125 Column: - 30
"...100% / (12 / 8)); } .sm-grid[_..." Line: 3128 Column: - 30
"...100% / (12 / 9)); } .sm-grid[_..." Line: 3131 Column: - 31
"...00% / (12 / 10)); } .sm-grid[_..." Line: 3134 Column: - 31
"...00% / (12 / 11)); } .sm-grid[_..."

Attribute “_ngcontent-sc8” not allowed on element “div” at this point.

Line: 3272 Column: 127 - 164
"...st-sc8=""><div _ngcontent-sc8="" class="header"> <..." Line: 3273 Column: 5 - 40
"...der"> <div _ngcontent-sc8="" class="logo"> ..." Line: 3274 Column: 9 - 51
"...> <div _ngcontent-sc8="" class="arrow-arrea"> ..." Line: 3279 Column: 12 - 47
"... <div _ngcontent-sc8="" class="menu"> ..." Line: 3307 Column: 16 - 58
"... <div _ngcontent-sc8="" class="menu-mobile"> ..." Line: 3308 Column: 13 - 51
"... <div _ngcontent-sc8="" class="sm-menu"> ..."

Attribute “_ngcontent-sc8” not allowed on element “img” at this point.

Line: 3277 Column: 9 - 85
"...> <img _ngcontent-sc8="" alt="SuperMemo" src="../../../assets/images/logo.svg"> <..."

Attribute “_ngcontent-sc8” not allowed on element “ul” at this point.

Line: 3280 Column: 16 - 59
"... <ul _ngcontent-sc8="" class="standard-menu"> ..." Line: 3303 Column: 9 - 51
"...> <ul _ngcontent-sc8="" class="login-button"> ..."

Attribute “_ngcontent-sc8” not allowed on element “li” at this point.

Line: 3282 Column: 13 - 34
"... <li _ngcontent-sc8=""> ..." Line: 3285 Column: 13 - 34
"... <li _ngcontent-sc8=""> ..." Line: 3288 Column: 20 - 41
"... <li _ngcontent-sc8=""> ..." Line: 3292 Column: 20 - 41
"... <li _ngcontent-sc8=""> ..." Line: 3295 Column: 13 - 34
"... <li _ngcontent-sc8=""> ..." Line: 3298 Column: 13 - 34
"... <li _ngcontent-sc8=""> ..."

Attribute “_ngcontent-sc8” not allowed on element “a” at this point.

Line: 3283 Column: 17 - 98
"... <a _ngcontent-sc8="" href="/en/catalog/language?language=en&monolingual=true">Course..." Line: 3286 Column: 17 - 53
"... <a _ngcontent-sc8="" href="/en/apps">Apps</..." Line: 3289 Column: 17 - 66
"... <a _ngcontent-sc8="" href="/en/page/subscription">Premiu..." Line: 3293 Column: 17 - 57
"... <a _ngcontent-sc8="" href="/en/page/b2b">B2B</a..." Line: 3296 Column: 17 - 53
"... <a _ngcontent-sc8="" href="/en/blog">Blog</..." Line: 3299 Column: 24 - 89
"... <a _ngcontent-sc8="" href="/en/authorization/login?returnUrl=%2F"><span ..."

Attribute “_ngcontent-sc8” not allowed on element “span” at this point.

Line: 3299 Column: 90 - 147
"...nUrl=%2F"><span _ngcontent-sc8="" class="button button-deep-orange">Log in..." Line: 3309 Column: 17 - 40
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"... <a _ngcontent-sc12="" target="_blank" href="https://static.supermemo.com/regulations/smcom/20180522/en/terms-of-use.pdf">Terms ..." Line: 3630 Column: 17 - 139
"... <a _ngcontent-sc12="" target="_blank" href="https://static.supermemo.com/regulations/smcom/20180522/en/privacy-policy.pdf">Privac..."

Attribute “_ngcontent-sc12” not allowed on element “i” at this point.

Line: 3604 Column: 17 - 58
"... <i _ngcontent-sc12="" class="sprite-icon"></i> ..." Line: 3610 Column: 17 - 58
"... <i _ngcontent-sc12="" class="sprite-icon"></i> ..." Line: 3613 Column: 17 - 58
"... <i _ngcontent-sc12="" class="sprite-icon"></i> ..." Line: 3616 Column: 17 - 58
"... <i _ngcontent-sc12="" class="sprite-icon"></i> ..." Line: 3619 Column: 17 - 58
"... <i _ngcontent-sc12="" class="sprite-icon"></i> ..." Line: 3622 Column: 17 - 58
"... <i _ngcontent-sc12="" class="sprite-icon"></i> ..."

Attribute “_ngcontent-sc12” not allowed on element “label” at this point.

Line: 3632 Column: 13 - 53
"... <label _ngcontent-sc12="" for="language"></labe..."

Attribute “_ngcontent-sc12” not allowed on element “select” at this point.

Line: 3633 Column: 13 - 141
"... <select _ngcontent-sc12="" id="language" name="language" selectedindex="-1" value="en" class="ng-untouched ng-pristine ng-valid"> ..."

Attribute “selectedindex” not allowed on element “select” at this point.

Line: 3633 Column: 13 - 141
"... <select _ngcontent-sc12="" id="language" name="language" selectedindex="-1" value="en" class="ng-untouched ng-pristine ng-valid"> ..."

Attribute “value” not allowed on element “select” at this point.

Line: 3633 Column: 13 - 141
"... <select _ngcontent-sc12="" id="language" name="language" selectedindex="-1" value="en" class="ng-untouched ng-pristine ng-valid"> ..."

Attribute “_ngcontent-sc12” not allowed on element “option” at this point.

Line: 3634 Column: 24 - 61
"... <option _ngcontent-sc12="" value="en"> ..." Line: 3636 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="pl"> ..." Line: 3638 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="de"> ..." Line: 3640 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="es"> ..." Line: 3642 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="fr"> ..." Line: 3644 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="it"> ..." Line: 3646 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="ru"> ..." Line: 3648 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="zh"> ..." Line: 3650 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="uk"> ..." Line: 3652 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="ko"> ..." Line: 3654 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="cs"> ..." Line: 3656 Column: 26 - 63
"... </option><option _ngcontent-sc12="" value="pt"> ..." Line: 3658 Column: 26 - 66
"... </option><option _ngcontent-sc12="" value="es-ar"> ..." Line: 3660 Column: 26 - 66
"... </option><option _ngcontent-sc12="" value="pt-br"> ..."

Attribute “_ngcontent-sc4” not allowed on element “div” at this point.

Line: 3684 Column: 48 - 87
"...st-sc4=""><div _ngcontent-sc4="" class="sm-toast"> <..."

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supermemo.com Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

supermemo.com TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

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supermemo.com desktop page speed rank

supermemo.com Desktop Speed Test Quick Summary

priority - 62Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 603.6KiB (50% reduction).

priority - 36Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 352.5KiB (83% reduction).

priority - 14Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 9Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 10 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 4Reduce server response time

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 9.6KiB (53% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 1.3KiB (26% reduction).

supermemo.com Desktop Resource Breakdown

supermemo.com mobile page speed rank

supermemo.com Mobile Speed Test Quick Summary

priority - 34Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

priority - 8Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

64.6KiB of the HTML response was required to render the above-the-fold content. This requires 3 network round-trips. Prioritize the above-the-fold content so that it can be rendered with only the first 2 round-trips' worth of HTML.

priority - 8Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 5Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 50.6KiB (78% reduction).

priority - 1Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 8.7KiB (48% reduction).

priority - 0Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 646B (85% reduction).

supermemo.com Mobile Resource Breakdown

supermemo.com mobile page usability

supermemo.com Mobile Usability Test Quick Summary

priority - 6Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

supermemo.com HTML validation

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

The “type” attribute is unnecessary for JavaScript resources.

Errors

Attribute “ng-transition” not allowed on element “style” at this point.

CSS: “width”: Parse Error.

Attribute “_ngcontent-sc8” not allowed on element “div” at this point.

Attribute “_ngcontent-sc8” not allowed on element “img” at this point.

Attribute “_ngcontent-sc8” not allowed on element “ul” at this point.

Attribute “_ngcontent-sc8” not allowed on element “li” at this point.

Attribute “_ngcontent-sc8” not allowed on element “a” at this point.

Attribute “_ngcontent-sc8” not allowed on element “span” at this point.

Attribute “_ngcontent-sc10” not allowed on element “div” at this point.

Attribute “_ngcontent-sc10” not allowed on element “img” at this point.

Attribute “_ngcontent-sc10” not allowed on element “h1” at this point.

Attribute “_ngcontent-sc10” not allowed on element “h4” at this point.

Attribute “_ngcontent-sc10” not allowed on element “i” at this point.