Javascript.info

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Title Tag

The Modern JavaScript Tutorial
Length: 30 character(s)

Meta Description

Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.
Length: 166 character(s)

Meta Keywords

No Keywords

Headings

<H1><H2><H3><H4><H5><H6>
150000
<H1> The Modern JavaScript Tutorial </H1>
<H2> Table of contents </H2>
<H2> The JavaScript language </H2>
<H2> Browser: Document, Events, Interfaces </H2>
<H2> Additional articles </H2>
<H2> Comments </H2>

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The Modern JavaScript Tutorial

javascript.info/

Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.


Alt Attribute

We found 4 images on this web page
False4 ALT attributes are empty or missing.

/img/sitetoolbar__logo_en.svg
/img/sitetoolbar__logo_en-white.svg
/img/sitetoolbar__logo_small_en.svg
/img/sitetoolbar__logo_small_en-white.svg

Keywords Cloud

  • events7
  • javascript7
  • browser6
  • methods5
  • code4
  • introduction4
  • class4
  • shadow4
  • properties4
  • object4
  • classes3
  • flag3
  • objects3
  • custom3
  • error3

Keyword Consistency

KeywordsFreqTitleDesc<H>
events7FalseTrueTrue
javascript7TrueTrueTrue
browser6FalseFalseTrue
methods5FalseFalseFalse
code4FalseFalseFalse
introduction4FalseFalseFalse
class4FalseFalseFalse
shadow4FalseFalseFalse
properties4FalseFalseFalse
object4FalseTrueFalse
classes3FalseFalseFalse
flag3FalseFalseFalse
objects3FalseFalseFalse
custom3FalseFalseFalse
error3FalseFalseFalse

Text/HTML Ratio

HTML to Text Ratio is: 12.66%

Text content size6389 bytes
Total HTML size50462 bytes

GZIP compression

Wow! It's GZIP Enabled.
True Your webpage is compressed from 49 KB to 9 KB (81.4 % size savings)

WWW Resolve

Great, a redirect is in place to redirect traffic from your non-preferred domain.

IP Canonicalization

No your domain IP 104.26.12.17 does not redirect to javascript.info

In-Page Links

We found a total of 232 links including both internal & external links of your site

AnchorTypeFollow
EN EnglishInternal LinksDofollow
Help to translateInternal LinksDofollow
http://javascript.info/Internal LinksDofollow
Buy EPUB/PDFInternal LinksDofollow
Tutorial mapInternal LinksDofollow
An introductionInternal LinksDofollow
An Introduction to JavaScriptInternal LinksDofollow
Manuals and specificationsInternal LinksDofollow
Code editorsInternal LinksDofollow
Developer consoleInternal LinksDofollow
JavaScript FundamentalsInternal LinksDofollow
Hello, world!Internal LinksDofollow
Code structureInternal LinksDofollow
The modern mode, "use strict"Internal LinksDofollow
VariablesInternal LinksDofollow
Data typesInternal LinksDofollow
Interaction: alert, prompt, confirmInternal LinksDofollow
Type ConversionsInternal LinksDofollow
Basic operators, mathsInternal LinksDofollow
ComparisonsInternal LinksDofollow
Conditional branching: if, '?'Internal LinksDofollow
Logical operatorsInternal LinksDofollow
Nullish coalescing operator '??'Internal LinksDofollow
Loops: while and forInternal LinksDofollow
The "switch" statementInternal LinksDofollow
FunctionsInternal LinksDofollow
Function expressionsInternal LinksDofollow
Arrow functions, the basicsInternal LinksDofollow
JavaScript specialsInternal LinksDofollow
Code qualityInternal LinksDofollow
Debugging in the browserInternal LinksDofollow
Coding StyleInternal LinksDofollow
CommentsInternal LinksDofollow
Ninja codeInternal LinksDofollow
Automated testing with MochaInternal LinksDofollow
Polyfills and transpilersInternal LinksDofollow
Objects: the basicsInternal LinksDofollow
ObjectsInternal LinksDofollow
Object references and copyingInternal LinksDofollow
Garbage collectionInternal LinksDofollow
Object methods, "this"Internal LinksDofollow
Constructor, operator "new"Internal LinksDofollow
Optional chaining '?.'Internal LinksDofollow
Symbol typeInternal LinksDofollow
Object to primitive conversionInternal LinksDofollow
Data typesInternal LinksDofollow
Methods of primitivesInternal LinksDofollow
NumbersInternal LinksDofollow
StringsInternal LinksDofollow
ArraysInternal LinksDofollow
Array methodsInternal LinksDofollow
IterablesInternal LinksDofollow
Map and SetInternal LinksDofollow
WeakMap and WeakSetInternal LinksDofollow
Object.keys, values, entriesInternal LinksDofollow
Destructuring assignmentInternal LinksDofollow
Date and timeInternal LinksDofollow
JSON methods, toJSONInternal LinksDofollow
Advanced working with functionsInternal LinksDofollow
Recursion and stackInternal LinksDofollow
Rest parameters and spread syntaxInternal LinksDofollow
Variable scope, closureInternal LinksDofollow
The old "var"Internal LinksDofollow
Global objectInternal LinksDofollow
Function object, NFEInternal LinksDofollow
The "new Function" syntaxInternal LinksDofollow
Scheduling: setTimeout and setIntervalInternal LinksDofollow
Decorators and forwarding, call/applyInternal LinksDofollow
Function bindingInternal LinksDofollow
Arrow functions revisitedInternal LinksDofollow
Object properties configurationInternal LinksDofollow
Property flags and descriptorsInternal LinksDofollow
Property getters and settersInternal LinksDofollow
Prototypes, inheritanceInternal LinksDofollow
Prototypal inheritanceInternal LinksDofollow
F.prototypeInternal LinksDofollow
Native prototypesInternal LinksDofollow
Prototype methods, objects without __proto__Internal LinksDofollow
ClassesInternal LinksDofollow
Class basic syntaxInternal LinksDofollow
Class inheritanceInternal LinksDofollow
Static properties and methodsInternal LinksDofollow
Private and protected properties and methodsInternal LinksDofollow
Extending built-in classesInternal LinksDofollow
Class checking: "instanceof"Internal LinksDofollow
MixinsInternal LinksDofollow
Error handlingInternal LinksDofollow
Error handling, "try...catch"Internal LinksDofollow
Custom errors, extending ErrorInternal LinksDofollow
Promises, async/awaitInternal LinksDofollow
Introduction: callbacksInternal LinksDofollow
PromiseInternal LinksDofollow
Promises chainingInternal LinksDofollow
Error handling with promisesInternal LinksDofollow
Promise APIInternal LinksDofollow
PromisificationInternal LinksDofollow
MicrotasksInternal LinksDofollow
Async/awaitInternal LinksDofollow
Generators, advanced iterationInternal LinksDofollow
GeneratorsInternal LinksDofollow
Async iteration and generatorsInternal LinksDofollow
ModulesInternal LinksDofollow
Modules, introductionInternal LinksDofollow
Export and ImportInternal LinksDofollow
Dynamic importsInternal LinksDofollow
MiscellaneousInternal LinksDofollow
Proxy and ReflectInternal LinksDofollow
Eval: run a code stringInternal LinksDofollow
CurryingInternal LinksDofollow
Reference TypeInternal LinksDofollow
BigIntInternal LinksDofollow
DocumentInternal LinksDofollow
Browser environment, specsInternal LinksDofollow
DOM treeInternal LinksDofollow
Walking the DOMInternal LinksDofollow
Searching: getElement*, querySelector*Internal LinksDofollow
Node properties: type, tag and contentsInternal LinksDofollow
Attributes and propertiesInternal LinksDofollow
Modifying the documentInternal LinksDofollow
Styles and classesInternal LinksDofollow
Element size and scrollingInternal LinksDofollow
Window sizes and scrollingInternal LinksDofollow
CoordinatesInternal LinksDofollow
Introduction to EventsInternal LinksDofollow
Introduction to browser eventsInternal LinksDofollow
Bubbling and capturingInternal LinksDofollow
Event delegationInternal LinksDofollow
Browser default actionsInternal LinksDofollow
Dispatching custom eventsInternal LinksDofollow
UI EventsInternal LinksDofollow
Mouse eventsInternal LinksDofollow
Moving the mouse: mouseover/out, mouseenter/leaveInternal LinksDofollow
Drag'n'Drop with mouse eventsInternal LinksDofollow
Pointer eventsInternal LinksDofollow
Keyboard: keydown and keyupInternal LinksDofollow
ScrollingInternal LinksDofollow
Forms, controlsInternal LinksDofollow
Form properties and methodsInternal LinksDofollow
Focusing: focus/blurInternal LinksDofollow
Events: change, input, cut, copy, pasteInternal LinksDofollow
Forms: event and method submitInternal LinksDofollow
Document and resource loadingInternal LinksDofollow
Page: DOMContentLoaded, load, beforeunload, unloadInternal LinksDofollow
Scripts: async, deferInternal LinksDofollow
Resource loading: onload and onerrorInternal LinksDofollow
MiscellaneousInternal LinksDofollow
Mutation observerInternal LinksDofollow
Selection and RangeInternal LinksDofollow
Event loop: microtasks and macrotasksInternal LinksDofollow
Frames and windowsInternal LinksDofollow
Popups and window methodsInternal LinksDofollow
Cross-window communicationInternal LinksDofollow
The clickjacking attackInternal LinksDofollow
Binary data, filesInternal LinksDofollow
ArrayBuffer, binary arraysInternal LinksDofollow
TextDecoder and TextEncoderInternal LinksDofollow
BlobInternal LinksDofollow
File and FileReaderInternal LinksDofollow
Network requestsInternal LinksDofollow
FetchInternal LinksDofollow
FormDataInternal LinksDofollow
Fetch: Download progressInternal LinksDofollow
Fetch: AbortInternal LinksDofollow
Fetch: Cross-Origin RequestsInternal LinksDofollow
Fetch APIInternal LinksDofollow
URL objectsInternal LinksDofollow
XMLHttpRequestInternal LinksDofollow
Resumable file uploadInternal LinksDofollow
Long pollingInternal LinksDofollow
WebSocketInternal LinksDofollow
Server Sent EventsInternal LinksDofollow
Storing data in the browserInternal LinksDofollow
Cookies, document.cookieInternal LinksDofollow
LocalStorage, sessionStorageInternal LinksDofollow
IndexedDBInternal LinksDofollow
AnimationInternal LinksDofollow
Bezier curveInternal LinksDofollow
CSS-animationsInternal LinksDofollow
JavaScript animationsInternal LinksDofollow
Web componentsInternal LinksDofollow
From the orbital heightInternal LinksDofollow
Custom elementsInternal LinksDofollow
Shadow DOMInternal LinksDofollow
Template elementInternal LinksDofollow
Shadow DOM slots, compositionInternal LinksDofollow
Shadow DOM stylingInternal LinksDofollow
Shadow DOM and eventsInternal LinksDofollow
Regular expressionsInternal LinksDofollow
Patterns and flagsInternal LinksDofollow
Character classesInternal LinksDofollow
Unicode: flag "u" and class \p{...}Internal LinksDofollow
Anchors: string start ^ and end $Internal LinksDofollow
Multiline mode of anchors ^ $, flag "m"Internal LinksDofollow
Word boundary: \bInternal LinksDofollow
Escaping, special charactersInternal LinksDofollow
Sets and ranges [...]Internal LinksDofollow
Quantifiers +, *, ? and {n}Internal LinksDofollow
Greedy and lazy quantifiersInternal LinksDofollow
Capturing groupsInternal LinksDofollow
Backreferences in pattern: \N and \k<name>Internal LinksDofollow
Alternation (OR) |Internal LinksDofollow
Lookahead and lookbehindInternal LinksDofollow
Catastrophic backtrackingInternal LinksDofollow
Sticky flag "y", searching at positionInternal LinksDofollow
Methods of RegExp and StringInternal LinksDofollow
about the projectInternal LinksDofollow
contact usInternal LinksDofollow
terms of usageInternal LinksDofollow
privacy policyInternal LinksDofollow
AR عربيExternal LinksDofollow
ES EspañolExternal LinksDofollow
FR FrançaisExternal LinksDofollow
ID IndonesiaExternal LinksDofollow
IT ItalianoExternal LinksDofollow
JA 日本語External LinksDofollow
KO 한국어External LinksDofollow
RU РусскийExternal LinksDofollow
TR TürkçeExternal LinksDofollow
UK УкраїнськаExternal LinksDofollow
ZH 简体中文External LinksDofollow
https://twitter.com/share?url=https%3A%2F%2Fjavascript.info%2FExternal LinksNofollow
https://www.facebook.com/sharer/sharer.php?s=100&p%5Burl%5D=https%3A%2F%2Fjavascript.info%2FExternal LinksNofollow
16850 ★ githubExternal LinksDofollow
Discord ChatExternal LinksDofollow
submit a GitHub issueExternal LinksDofollow
plnkrExternal LinksDofollow
jsbinExternal LinksDofollow
codepenExternal LinksDofollow

XML Sitemap

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http://javascript.info/sitemap.xml

Robots.txt

Good, you have Robots.txt file!
http://javascript.info/robots.txt

URL Rewrite

Good, all URLs look clean and friendly

Underscores in the URLs

Great, you are not using underscores (these_are_underscores) in your URLs

Embedded Objects

Perfect, no embedded objects has been detected on this page

Iframe

Perfect, no Iframe content has been detected on this page

Domain Registration

Exactly how many years and months

Domain Age: 20 Years, 221 Days

Created Date: 21st-Sep-2001

Updated Date: 11th-May-2019

Expiry Date: 21st-Sep-2022

WHOIS Data

WhoIs domain information can help you determine the proper administrator, billing and technical
contact information.

Domain Name: javascript.info
Registry Domain ID: dc62dd4a0a7e40df9302cc7bdfe491d2-DONUTS
Registrar WHOIS Server: http://whois.cloudflare.com
Registrar URL: http://cloudflare.com
Updated Date: 2019-05-11T20:45:40Z
Creation Date: 2001-09-21T03:49:14Z
Registry Expiry Date: 2022-09-21T03:49:14Z
Registrar: Cloudflare, Inc
Registrar IANA ID: 1910
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: DATA REDACTED
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: DATA REDACTED
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
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Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
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: 2022-04-29T23:49:58Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

Terms of Use: Donuts Inc. provides this Whois service for information purposes, and to assist persons in obtaining information about or related to a domain name registration record. Donuts does not guarantee its accuracy. Users accessing the Donuts Whois service agree to use the data only for lawful purposes, and under no circumstances may this data be used to: a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the registrar's own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Donuts or any ICANN-accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. When using the Donuts Whois service, please consider the following: The Whois service is not a replacement for standard EPP commands to the SRS service. Whois is not considered authoritative for registered domain objects. The Whois service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the Whois services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of Whois service access. Abuse of the Whois system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the Whois records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to this data can be requested by submitting a request via the form found at https://donuts.domains/about/policies/whois-layered-access/ Donuts Inc. reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.

Mobile Friendliness

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Your mobile friendly score is 0/100

Mobile View

Javascript.info Mobile Screenshot

Mobile Compatibility

Perfect, no embedded objects detected.

URL

http://javascript.info
Length: 10 characters

Favicon

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Custom 404 Page

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Page Size

49 KB (World Wide Web average is 320 Kb)

Load Time

0.47 second(s)

Language

Good, you have declared your language
Declared Language: English

Domain Availability

Domains (TLD)Status
javascript.comAlready Registered
javascript.netAlready Registered
javascript.orgAlready Registered
javascript.bizAlready Registered
javascript.ioAlready Registered

Typo Availability

Domains (TLD)Status
navascript.infoAlready Registered
havascript.infoAlready Registered
yavascript.infoAlready Registered
uavascript.infoAlready Registered
iavascript.infoAlready Registered

Email Privacy

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Safe Browsing

The website is not blacklisted and looks safe to use.

Server IP

Server IPServer LocationService Provider
104.26.13.17United StatesCloudflare

Speed Tips

Tips for authoring fast-loading HTML pages:

True Perfect, your website has few CSS files.

False Too bad, your website has too many JavaScript files.

True Perfect, your website doesn't use nested tables.

False Too bad, your website is using inline styles.

Analytics

Perfect, We detect an analytics tool installed on this website.

W3C Validity

W3C not validated

Doc Type

Your Web Page doctype is HTML 5

Encoding

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Indexed Pages

Indexed pages in search engines

39 Page(s)

Backlinks Counter

Number of backlinks to your website

754 Backlink(s)

Social Data

Your social media status




Estimated Worth

$337,944 USD

Traffic Rank

6,628th most visited website in the World.

Visitors Localization

Your website is popular on following countries:

CountriesPercent of Visitors
China26.7%
India22.0%
United States6.4%


 

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