javascript.info

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Schermafbeelding van website

Updatedatum van paginaanalyse: 2026/03/30 20:58:28

Laatste whois-updatedatum: 2026/01/26 11:27:49

Domeinstatus

Geregistreerd

Betaald tot

21.09.2026

Verkrijgbaar vanaf

21.10.2026

SEO-score

61.64%

Score behaald

146

Maximale score

Belangrijkste informatie

ℹ️

Titel: The Modern JavaScript Tutorial

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

Trefwoorden: empty

Paginacodering: onbekend Lichaams- en servertekenset zijn verschillend!

Pagina Bestandsgrootte: 57 KB

Serverinformatie

🖥️

IP: 104.26.12.17

Locatie: ,,,,,,

Http-server: cloudflare

Codering: utf-8

Lijst metatags

🏷️

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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
name: msapplication-TileImage content: /img/favicon/tileicon.png
itemprop: image content: https://javascript.info/img/site_preview_en_512x512.png
property: og:title content: The Modern JavaScript Tutorial
property: og:image content: https://javascript.info/img/site_preview_en_1200x630.png
property: og:image:type content: image/png
property: og:image:width content: 1200
property: og:image:height content: 630
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.

Interne koppelingen

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Externe koppelingen

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Whois-informatie

📄

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 onbewerkte gegevens

📋

            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

Robots.txt

🤖

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

SEO-audit

🔍

Technische SEO

✓

Reactiecode

200

Status 200 OK - pagina wordt correct geladen.

Tekencodering

Page: , Header: utf-8

Tekencodering komt niet overeen tussen HTML- en HTTP-headers.

✓

Paginagrootte

59126 bytes

Paginaformaat acceptabel voor snel laden.

✓

Bronnen

22 total

Matig aantal bronnen. Overweeg om bestanden te combineren.

✓

Hreflang-tags

0 hreflang tags

Voeg hreflang-tags toe als u meertalige inhoud heeft.

✓

Robots.txt

Exists

Robots.txt-bestand gevonden.

Sitemap

Not found

Voeg sitemap.xml toe en verwijs ernaar in robots.txt.

✓

HTTPS

Yes

Beveiligde HTTPS-verbinding ingeschakeld.

Compressie

Schakel gzip- of zstd-compressie in om de bestandsgrootte te verkleinen.

Caching

Not set

Voeg cache-control headers toe om de laadsnelheid voor terugkerende bezoekers te verbeteren.

✓

Paginasnelheid

5.84 ms

Uitstekende laadsnelheid.

SEO op de pagina

✓

Titel

The Modern JavaScript Tutorial

Goede titellengte (30-60 tekens).

Metabeschrijving

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

Metabeschrijving te lang. Reduceer tot 100-160 tekens.

✓

H1-rubriek

1 found - "The Modern JavaScript Tutorial"

Goed - enkele H1-rubriek gevonden.

Aantal woorden

263

Inhoud zeer kort. Streef naar minimaal 500 woorden voor betere SEO.

Canonieke tag

Voeg een canonieke tag toe om problemen met dubbele inhoud te voorkomen.

✓

Dubbele meta

[]

Geen dubbele metatags gevonden.

✓

Trefwoorden

empty

Meta-trefwoorden ingesteld (let op: niet gebruikt door grote zoekmachines).

Inhoud en UX

✓

Taal

Taalkenmerk correct ingesteld.

Afbeeldingen

4 total, 4 missing ALT

Voeg ALT-tekst toe aan afbeeldingen voor toegankelijkheid en SEO.

✓

Kijkpoort

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

Viewport-metatag correct ingesteld voor mobiele apparaten.

Grafiek openen

Missing: og:description, og:url

Voeg ontbrekende OpenGraph-tags toe voor het delen op sociale media:og:description, og:url

✓

Gestructureerde gegevens

1 JSON-LD scripts

Gestructureerde gegevens (JSON-LD) gevonden.

Posities binnen Google

Zoek zinnen - Google

🔍

Positie	Zin	Pagina	Fragment
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.

Posities binnen Yandex

Zoek zinnen - Yandex

🔍

Positie	Zin	Pagina	Fragment
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().

Aanvullende diensten

💎

javascript.info

javascript.info Schermafbeelding van website

Belangrijkste informatie

Serverinformatie

Lijst metatags

Interne koppelingen

Externe koppelingen

Whois-informatie

Whois onbewerkte gegevens

Robots.txt

SEO-audit

Technische SEO

SEO op de pagina

Inhoud en UX

Posities binnen Google

Zoek zinnen - Google

Posities binnen Yandex

Zoek zinnen - Yandex

Aanvullende diensten

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