javascript.info

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21.09.2026

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21.10.2026

SEO-poengsum

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146

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Tittel: The Modern JavaScript Tutorial

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

Nøkkelord: empty

Sidekoding: ukjent Brødtekst og servertegnsett er forskjellige!

Sidefilstørrelse: 57 KB

Serverinformasjon

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IP: 104.26.12.17

Sted: ,,,,,,

Http-server: cloudflare

Koding: utf-8

Metatags liste

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name: viewport content: width=device-width, initial-scale=1, user-scalable=no, minimum-scale=1.0
name: apple-mobile-web-app-capable content: yes
name: msapplication-TileColor content: #222A2C
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property: og:title content: The Modern JavaScript Tutorial
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property: fb:admins content: 100001562528165
name: twitter:card content: summary
name: twitter:title content: The Modern JavaScript Tutorial
name: twitter:site content: @iliakan
name: twitter:creator content: @iliakan
name: twitter:image content: https://javascript.info/img/site_preview_en_512x512.png
name: google-adsense-account content: ca-pub-6204518652652613
name: description content: Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.

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Whois informasjon

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domain_name: javascript.info

update_date: 2025-08-27T04:04:52.092Z

update_time: 1756267492

creation_date: 2001-09-21T03:49:14.017Z

creation_time: 1001044154

expiration_date: 2026-09-21T03:49:14.017Z

Whois rådata

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            Domain Name: JAVASCRIPT.INFO
Registrar: Cloudflare, Inc
Domain Status: client transfer prohibited
Registry Expiry Date: 2026-09-21T03:49:14.017Z
Creation Date: 2001-09-21T03:49:14.017Z
Updated Date: 2025-08-27T04:04:52.092Z
Name Server: INES.NS.CLOUDFLARE.COM
Name Server: DAMON.NS.CLOUDFLARE.COM
REGISTRAR Contact: Cloudflare, Inc
>>> Last update of RDAP database: 2026-01-26T14:27:49Z

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			User-agent: *
Disallow: /node/
Disallow: /users/
Disallow: /content/
Disallow: /play/
Disallow: /profile/

SEO revisjon

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Teknisk SEO

✓

Responskode

200

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Tegnkoding

Page: , Header: utf-8

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✓

Sidestørrelse

59126 bytes

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22 total

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5.84 ms

Utmerket lastehastighet.

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Tittel

The Modern JavaScript Tutorial

God tittellengde (30-60 tegn).

Metabeskrivelse

Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more. Lenght:166

Metabeskrivelsen er for lang. Reduser til 100-160 tegn.

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1 found - "The Modern JavaScript Tutorial"

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Ordtelling

263

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[]

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empty

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Innhold og UX

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Språkattributtet er riktig angitt.

Bilder

4 total, 4 missing ALT

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width=device-width, initial-scale=1, user-scalable=no, minimum-scale=1.0

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1 JSON-LD scripts

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Posisjon	Uttrykk	Side	Utdrag
3	javascript data types	/types	Data types 9 июл. 2024 г. — There are eight basic data types in JavaScript . Here, we'll cover them in general and in the next chapters we'll talk about each of them in detail.
4	using javascript	/	The Modern JavaScript Tutorial Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks , including: closures, document and events, object oriented programming ...
4	array 1	/task/array-negative	Accessing array[-1] Accessing array[-1 ]. In some programming languages, we can access array elements using negative indexes, counted from the end. Like this: let array ...
5	javascript new	/constructor-new	Constructor, operator "new" 1 окт. 2022 г. — We need to create many similar objects, like multiple users or menu items and so on. That can be done using constructor functions and the "new" operator .
5	how to javascript	/	The Modern JavaScript Tutorial Here we learn JavaScript , starting from scratch and go on to advanced concepts like OOP. We concentrate on the language itself here, with the minimum of ...
6	javascript class method	/class	Class basic syntax 16 дек. 2021 г. — A class is an extensible program-code-template for creating objects, providing initial values for state (member variables) and implementations of behavior.
7	date javascript	/date	Date and time 14 окт. 2022 г. — It stores the date , time and provides methods for date /time management. For instance, we can use it to store creation/modification times, to measure time, or ...
8	u js	/regexp-unicode	Unicode: flag "u" and class \p{...} 5 авг. 2022 г. — Unicode: flag " u " and class \p{...} JavaScript uses Unicode encoding for strings. Most characters are encoded with 2 bytes, but that allows ...
9	new map	/map-set	Map and Set 14 нояб. 2022 г. — Map is a collection of keyed data items, just like an Object. But the main difference is that Map allows keys of any type.
9	js array	/array	Arrays 8 июн. 2024 г. — Arrays in JavaScript can work both as a queue and as a stack . They allow you to add/remove elements, both to/from the beginning or the end.

Stillinger i Yandex

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Posisjon	Uttrykk	Side	Utdrag
7	класс проверка	/instanceof	Class checking: "instanceof" The instanceof operator allows to check whether an object belongs to a certain class. It also takes inheritance into account. Such a check may be necessary in...
9	методы объектов	/object-methods	Object methods, "this" Here we’ve just used a Function Expression to create a function and assign it to the property user.sayHi of the object. Then we can call it as user.sayHi().

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javascript.info

javascript.info Skjermbilde av nettstedet

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SEO revisjon

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On-Page SEO

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Søkefraser - Yandex

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