Eloquentjavascript.net - SEO Checker

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Overview of the SEO Check
Meta information
67% 
Page quality
58% 
Page structure
100% 
Link structure
100% 
Server
91% 
External factors
100% 
SEO Score
Response time
0.11 s
File size
6.00 kB
Words
257
Media files
1
Number of links
32 internal / 16 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Eloquent JavaScript
The page title is too short. (179 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Server location: Netherlands
The language is not specified in the HTML markup.
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain name is very long.
The domain is no subdomain.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Favicon
(Nice to have)
No favicon is linked in the HTML code.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1
charsetutf-8

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Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
There are only 257 words on this page. Good pages should have about 800 words of useful content.
27.6% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 9.91 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1" is provided.
This page does not require any JavaScript files.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/img/cover.jpgCover image

Page structure

H1 heading
(Critically important)
Eloquent JavaScript 4th edition (2024)
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Eloquent JavaScript 4th edition (2024)
H2 Contents
H2 Other pages
H2 Translations
H3 (Part 1: Language)
H3 (Part 2: Browser)
H3 (Part 3: Node)
H3 Fourth Edition
H3 Third Edition
H3 Second Edition
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 16 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://nostarch.com/eloquent-...External IMG-ALT Cover image
https://nostarch.com/eloquent-...External paperback copy
https://creativecommons.org/li...External Creative Commons attribution-noncommercial license
/code/LICENSEMIT license
http://www.pechane.com/External Subdomain Péchane Sumi-e
http://madalinatantareanu.com/External Madalina Tantareanu
https://regexper.com/External regexper.com
http://lessmilk.com/External Thomas Palef
/00_intro.htmlIntroduction
/01_values.htmlValues, Types, and Operators
/02_program_structure.htmlProgram Structure
/03_functions.htmlFunctions
/04_data.htmlData Structures: Objects and Arrays
/05_higher_order.htmlHigher-order Functions
/06_object.htmlThe Secret Life of Objects
/07_robot.htmlProject: A Robot
/08_error.htmlBugs and Errors
/09_regexp.htmlRegular Expressions
/10_modules.htmlModules
/11_async.htmlAsynchronous Programming
/12_language.htmlProject: A Programming Language
/13_browser.htmlJavaScript and the Browser
/14_dom.htmlThe Document Object Model
/15_event.htmlHandling Events
/16_game.htmlProject: A Platform Game
/17_canvas.htmlDrawing on Canvas
/18_http.htmlHTTP and Forms
/19_paint.htmlProject: A Pixel Art Editor
/20_node.htmlNode.js
/21_skillsharing.htmlProject: Skill-Sharing Website
https://nostarch.com/eloquent-...External No Starch Press
/codeCode sandbox and exercise solutions
/errata.htmlErrata for the paper book
/Eloquent_JavaScript.pdfThis book as a single PDF file
/Eloquent_JavaScript_small.pdfsmall version for mobile
/Eloquent_JavaScript.epubThis book as an EPUB file
/Eloquent_JavaScript.mobiThis book as a MOBI (Kindle) file
/1st_editionThe first edition of the book
/2nd_editionThe second edition of the book
/3rd_editionThe third edition of the book
https://eloquent-javascript-es...External Subdomain Español (Spanish)
https://academy.hsoub.com/file...External Subdomain عَرَبِيّ (Arabic)
http://eloquentjs.ir/External فارسی (Persian)
https://eloquentjs-es.thedojo.mx/External Subdomain Español (Spanish, partial)
https://rabahboudia.gitbooks.i...External Subdomain Text duplicate عَرَبِيّ (Arabic)
https://to6esko.github.io/External Subdomain Български (Bulgarian)
https://github.com/braziljs/el...External Português (Portuguese)
https://karmazzin.gitbooks.io/...External Subdomain Русский (Russian)

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://eloquentjavascript.net/"
HTTP header
(Important)
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.11 seconds.
This page only loads 1 CSS files. That's ok.
This page does not require any JavaScript files.
The file size of the HTML document is fine (6 kB).

HTTP Response Header

NameValue
servernginx/1.22.1
dateMon, 04 Aug 2025 20:18:00 GMT
content-typetext/html; charset=utf-8
last-modifiedTue, 06 Aug 2024 05:54:55 GMT
transfer-encodingchunked
connectionkeep-alive
etagW/"66b1baaf-17f5"
content-encodinggzip
statuscode200
http_versionHTTP/1.1

External factors

This website has excellent links from other websites.
This page has backlinks from 1,885 referring domains.
This page has 6,482 backlinks.
This page has backlinks from 1,218 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

No valid Robots.txt file was found.

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eloquentjavascript.net
Eloquent JavaScript

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
JavaScript73%Check
Eloquent73%Check
Eloquent JavaScript73%Check
book as54%Check
edition52%Check
second edition44%Check
third edition44%Check
Part43%Check
pixel art40%Check
Language38%Check
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