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SEO Report for javascript.info

November 18, 2019 12:34 AM
Desktop screen Desktop screenshot for javascript.info

SEO SCORE

Favicon for javascript.infojavascript.info
86

9 criteria passed
2 criteria to solve

PERFORMANCE OPPORTUNITIES

Set a meta content-type (or meta charset) for your website.
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Fill the missing alt attributes on your images.
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OVERVIEW

• Category
Technology & Computing  >  JavaScript
• Online since
September 21, 2001 (explore Wayback Machine)
• Age
19 years, 8 days
• Alexa Rank
#12.046, javascript.info is in the world's top 20.000 websites!

FREE FORM BUILDER

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SEO

SSL Certificate
Great, this website is SSL secured (HTTPS).
The certificate issued by CloudFlare, Inc. is valid from November 15, 2019 to October 9, 2020.
Title Tag
The Modern JavaScript Tutorial
Length: 30 (recommended: 10 to 70)
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 (recommended: 50 to 160)
Google preview
Desktop Version

The Modern JavaScript Tutorial

https://javascript.info

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

Mobile Version

Favicon for javascript.info https://javascript.info

The Modern JavaScript Tutorial

Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, o...

Encoding
No language/character encoding is specified
URL Resolve

Great, a redirect is in place to redirect traffic from your non-preferred domain. All versions of your page point to the same URL.

URL Parameters
Great, the domain URLs look clean.
Attribute Value
viewport width=device-width, initial-scale=1, user-scalable=yes, minimum-scale=1.0

SEMANTIC ANALYSIS

The results of our semantic analysis are shown below using the website's language.

They are the main concepts covered by javascript.info.

Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.

Topics
JavaScript Confidence: 91% Arrow up

JavaScript is a high-level, dynamic, untyped, and interpreted programming language.

It has been standardized in the ECMAScript language specification.

Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production; the majority of websites employ it, and all modern Web browsers support it without the need for plug-ins.

JavaScript is prototype-based with first-class functions, making it a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles.

It has an API for working with text, arrays, dates and regular expressions, but does not include any I/O, such as networking, storage, or graphics facilities, relying for these upon the host environment in which it is embedded.

Object-oriented programming Confidence: 91% Arrow up

Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which may contain data, in the form of fields, often known as attributes; and code, in the form of procedures, often known as methods.

A feature of objects is that an object's procedures can access and often modify the data fields of the object with which they are associated (objects have a notion of "this" or "self").

In OOP, computer programs are designed by making them out of objects that interact with one another.

There is significant diversity of OOP languages, but the most popular ones are class-based, meaning that objects are instances of classes, which typically also determine their type.

Web page Confidence: 76% Arrow up

A web page (webpage or Web page) is a document that is suitable for the World Wide Web and web browsers.

A web browser displays a web page on a monitor or mobile device.

The web page is what displays, but the term also refers to a computer file, usually written in HTML or comparable markup language.

Web browsers coordinate the various web resource elements for the written web page, such as style sheets, scripts, and images, to present the web page.

Closure (computer programming) Confidence: 72% Arrow up

In programming languages, closures (also lexical closures or function closures) are techniques for implementing lexically scoped name binding in languages with first-class functions.

Operationally, a closure is a record storing a function together with an environment: a mapping associating each free variable of the function (variables that are used locally, but defined in an enclosing scope) with the value or reference to which the name was bound when the closure was created.

A closure—unlike a plain function—allows the function to access those captured variables through the closure's copies of their values or references, even when the function is invoked outside their scope.

Event (computing) Confidence: 71% Arrow up

In computing, an event is an action or occurrence recognized by software that may be handled by the software.

Computer events can be generated or triggered by the system, by the user or in other ways.

Typically, events are handled synchronously with the program flow, that is, the software may have one or more dedicated places where events are handled, frequently an event loop.

A source of events includes the user, who may interact with the software by way of, for example, keystrokes on the keyboard.

Another source is a hardware device such as a timer.

Software can also trigger its own set of events into the event loop, e.g. to communicate the completion of a task.

Software that changes its behavior in response to events is said to be event-driven, often with the goal of being interactive.

WEBSITE SPEED

javascript.info website speed is fast. Page speed is important for visitors and search engines.

Get insights to improve your page loading time.

Page Loading Time

1.1s

This domain loads at the median speed of 1.1 seconds.

Speed Percentile

75%

javascript.info is faster than approximately 75 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.

A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.

TRAFFIC

This website is ranked #12.046 by Alexa.

This rank is traffic based. The lower the rank is, the better the domain is ranked.

Alexa data for javascript.info

Daily visitors by country

  • javascript.info daily visitors distribution - Total: 18 countries
  • Flag for IndiaIndia (32.3%)
  • Flag for United States of AmericaUnited States of America (20.7%)
  • Flag for Iran (Islamic Republic of)Iran (Islamic Republic of) (5.9%)
  • Flag for NigeriaNigeria (3.3%)
  • Flag for CanadaCanada (3.2%)
  • Flag for JapanJapan (3.8%)
  • Flaf icon for other countryOthers (30.8%)

Traffic country ranks

Country Rank
Flag for MoroccoMorocco #6.825
Flag for Viet NamViet Nam #7.070
Flag for IndiaIndia #2.320
Flag for IndonesiaIndonesia #19.572
Flag for EgyptEgypt #8.433

LAYOUT

Doctype HTML5 Arrow Responsive website, mobile-friendly. Arrow

Mobile Rendering

This website seems to be optimized for Mobile Visitors.

Phone
How javascript.info looks like on a mobile device such as an iPhone.

Tablet
How javascript.info looks like on a tablet such as an iPad.

Main colors used

These are the main HTML color codes used by this website. Arrow
  • 52% #404040
  • 34% #ffffff
  • 13% #f0f0f0
  • 0% #f0f0ff
  • 0% #f0ffff
  • 0% #b0c0d0
  • 0% #f0a070
  • 0% #c0d0e0
  • 0% #503020
  • 0% #a06050
  • 0% #d09070
  • 0% #d0e0f0

Text/code ratio

javascript.info's text/code ratio is 11.90%. It's a bit low. Consider raising it by adding more text content of value for your visitors, or keeping your code clean.
Text / Code Ratio 11.90%

A good text to HTML ratio is anywhere from 25 to 70%.

This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.

Main HTML tags

Headings Arrow up

Great, we found headings on this page.

  • <H1> 1
  • <H2> 5
  • <H3> 0
  • <H4> 0
  • <H5> 0
  • <H6> 0
<H1>
Top level heading
The modern javascript tutorial
<H2>
2nd level heading
Table of contents
The javascript language
Browser: document, events, ınterfaces
Additional articles
Comments
Alt attributes Arrow up

We found 2 images on this website.
2 ALT attributes are missing on your image tags.

Alternative text allows you to add a description to an image.

Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.

It looks like you're missing alternative text for 2 images on javascript.info. Check your website to make sure it's specified for each image on the page.

SOCIAL

This is an overview of your homepage shares on social networks.

You have a relatively high presence on social media, keep going!

The more people share your website, the more likely you will get links from others, which is a key point when it comes to improving your overall search engine rankings.

  • Facebook iconFacebook
  • Total Engagement 5.369
  • Likes 3.105
  • Shares 1.822
  • Comments 442
  • Pinterest iconPinterest 34
  • Linkedin iconLinkedin 0
  • Stumbleupon iconStumbleupon 0

DOMAIN

Domain Registrar CLOUDFLARE, INC.
Registration Date 09/21/2001 19 years, 8 days ago
Last Modified 05/11/2019 1 year, 4 months, 20 days ago
Nameservers Arrow up
Host IP Address Country
ines.ns.cloudflare.com 173.245.58.164 Flag for United StatesUnited States
damon.ns.cloudflare.com 173.245.59.96 Flag for United StatesUnited States

SERVER

Server map
  • Service Provider (ISP)
  • Cloudflare, Inc.
  • IP Address
  • 104.26.12.17
  • Country
  • Flag for United StatesUnited States
  • Region
  • Virginia , Ashburn
  • Latitude and Longitude
  • 39.0438 : -77.4874

TECHNOLOGY & COMPUTING > JAVASCRIPT COMPETITORS IN UNITED STATES

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