JAVASCRIPT.INFO The Modern JavaScript Tutorial


javascript.info website information.

javascript.info domain name is registered by .INFO top-level domain registry. See the other sites registred in .INFO domain zone.

No name server records were found.

and probably website javascript.info is hosted by FASTLY - Fastly, US web hosting company. Check the complete list of other most popular websites hosted by FASTLY - Fastly, US hosting company.

According to Alexa traffic rank the highest website javascript.info position was 2938 (in the world). The lowest Alexa rank position was 226866. Now website javascript.info ranked in Alexa database as number 28439 (in the world).

Website javascript.info Desktop speed measurement score (89/100) is better than the results of 87.7% of other sites and shows that the page is performing great on desktop computers.

javascript.info Mobile usability score (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.

Mobile speed measurement score of javascript.info (74/100) is better than the results of 83.2% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

Weekly Rank Report

DateRankChange
Oct-23-2021 28,439-3,292
Oct-22-2021 25,147-15,967
Oct-21-2021 9,1802,406
Oct-20-2021 11,586-584
Oct-19-2021 11,00212,352
Oct-18-2021 23,354-9,747
Oct-17-2021 13,6073,262

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javascript.info Rank History

Alexa can identify the popularity of a website as well as its competitors. It is important for website owners and bloggers to know their Alexa ranking because it shows how many visitors have viewed their web page. It gives them a clear idea of how popular their website is on the internet and the ranking of their competitors.



javascript.info whois

WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system, but is also used for a wider range of other information.


Domain Name: JAVASCRIPT.INFO
Registry Domain ID: D745950-LRMS
Registrar WHOIS Server:
Registrar URL:
Updated Date: 2019-05-11T20:45:40Z
Creation Date: 2001-09-21T03:49:14Z
Registry Expiry Date: 2022-09-21T03:49:14Z
Registrar Registration Expiration Date:
Registrar: CloudFlare, Inc.
Registrar IANA ID: 1910
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization: DATA REDACTED
Registrant State/Province: DATA REDACTED
Registrant Country: US
Name Server: INES.NS.CLOUDFLARE.COM
Name Server: DAMON.NS.CLOUDFLARE.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2021-04-25T13:40:00Z

javascript.info server information

Servers Location

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javascript.info desktop page speed rank

Last tested: 2019-12-09


Desktop Speed Good
89/100

javascript.info Desktop Speed Test Quick Summary


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

Your page has 1 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

https://javascript.info/pack/init.87ff322cad5b4fd55547.js

Optimize CSS Delivery of the following:

https://javascript.info/pack/styles.87ff322cad5b4fd55547.css
https://fonts.googleapis.com/css?family=Open+Sans:bold,italic,bolditalic
https://javascript.info/pack/frontpage.87ff322cad5b4fd55547.css

priority - 1 Leverage 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://mc.yandex.ru/metrika/advert.gif (60 minutes)
https://mc.yandex.ru/metrika/watch.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 1 Reduce server response time

In our test, your server responded in 0.27 seconds.

There are many factors that can slow down your server response time. Please read our recommendations to learn how you can monitor and measure where your server is spending the most time.

javascript.info Desktop Resources

Total Resources24
Number of Hosts5
Static Resources13
JavaScript Resources8
CSS Resources3

javascript.info Desktop Resource Breakdown

javascript.info mobile page speed rank

Last tested: 2019-12-09


Mobile Speed Medium
74/100

javascript.info Mobile Speed Test Quick Summary


priority - 32 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

https://javascript.info/pack/init.87ff322cad5b4fd55547.js

Optimize CSS Delivery of the following:

https://javascript.info/pack/styles.87ff322cad5b4fd55547.css
https://fonts.googleapis.com/css?family=Open+Sans:bold,italic,bolditalic
https://javascript.info/pack/frontpage.87ff322cad5b4fd55547.css

priority - 2 Leverage 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://mc.yandex.ru/metrika/advert.gif (60 minutes)
https://mc.yandex.ru/metrika/watch.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 1 Reduce server response time

In our test, your server responded in 0.27 seconds.

There are many factors that can slow down your server response time. Please read our recommendations to learn how you can monitor and measure where your server is spending the most time.

javascript.info Mobile Resources

Total Resources23
Number of Hosts4
Static Resources13
JavaScript Resources8
CSS Resources3

javascript.info Mobile Resource Breakdown

javascript.info mobile page usability

Last tested: 2019-12-09


Mobile Usability Good
99/100

javascript.info Mobile Usability Test Quick Summary


priority - 0 Size 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="https://www.fa…script.info%2F" class="frontpage-shar…share__icon_fb"> is close to 2 other tap targets.

The tap target <a href="https://www.fa…script.info%2F" class="frontpage-shar…share__icon_fb"> is close to 2 other tap targets.

The tap target <a href="/iterable" class="list-sub__link">Iterables</a> and 1 others are close to other tap targets.
The tap target <a href="/terms" class="page-footer__link">terms of usage</a> and 1 others are close to other tap targets.

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javascript.info Ping

Ping is a networking utility tool to test if a particular host is reachable. It is a diagnostic that checks reachability of a host on an Internet Protocol (IP) network. In a computer network, a ping test is a way of sending messages from one host to another. Aside from checking if the host is connected to a network, ping also gives indicators of the reliability and general speed of the connection.


javascript.info TRACEROUTE

Traceroute is a network diagnostic tool used to track the pathway taken by a packet on an IP network from source to destination. Traceroute also records the time taken for each hop the packet makes during its route to the destination. Traceroute uses ICMP (Internet Control Message Protocol) echo packets with variable time to live values. The response time of each hop is calculated. To guarantee accuracy, each hop is queried multiple times (usually three times) to better measure the response of that particular hop.