Chess.com Stack

Chess.com is built with the following tech stack:

Document Encoding

UTF-8

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

Document Standards

Meta Robot

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

Meta Description

The description attribute provides a concise explanation of the page content.

Open Graph Protocol

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

Twitter Cards

Twitter cards make it possible for you to attach media experiences to Tweets that link to your content.

Cascading Style Sheets

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML

HREF Lang

Contains language specific links.

Canonical Content Tag

Public specification of a preferred URL for a page allows search engines to understand the original location for content.

Web App Manifest

Defines the attributes of a web app in a simple JSON file. It describes how the web app should appear on the users system and how it should launch.

JSON-LD

JSON-LD, or JavaScript Object Notation for Linked Data, is a method of transporting Linked Data using JSON.

Javascript

JavaScript is a scripting language most often used for client-side web development.

Javascript Defer

The defer attribute gives a hint to the browser that the script does not create any content so the browser can optionally defer interpreting the script. This can improve performance by delaying execution of scripts until after the body content is parsed and rendered.

WAI-ARIA

A way to make Web content and Web applications more accessible to people with disabilities. It especially helps with dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies.

Srcset

Adapting images for high-resolution and low-resolution displays.

HTML5 DocType

The DOCTYPE is a required preamble for HTML5 websites.

HTML 5 Specific Tags

This page contains tags that are specific to an HTML 5 implementation.

Content Security Policy

Content Security Policy is a computer security concept, to prevent cross-site scripting XSS attacks.

Content Type Options

Used to disable MIME-sniffing for a particular HTTP response.

Strict Transport Security

The HTTP Strict-Transport-Security (HSTS) header instructs the browser to only use https.

Mobile

Viewport Meta

This page uses the viewport meta tag which means the content may be optimized for mobile content.

Apple Mobile Web Clips Icon

This page contains an icon for iPhone, iPad and iTouch devices.

Language

United States HREF LANG

This webpage has alternate versions available in United States via the use of the hreflang tag.

Spain HREF LANG

This webpage has alternate versions available in Spain via the use of the hreflang tag.

France HREF LANG

This webpage has alternate versions available in France via the use of the hreflang tag.

Germany HREF LANG

This webpage has alternate versions available in Germany via the use of the hreflang tag.

Poland HREF LANG

This webpage has alternate versions available in Poland via the use of the hreflang tag.

Russia HREF LANG

This webpage has alternate versions available in Russia via the use of the hreflang tag.

Sweden HREF LANG

This webpage has alternate versions available in Sweden via the use of the hreflang tag.

Greek HREF LANG

This webpage has alternate versions available in Greek via the use of the hreflang tag.

Portugal HREF LANG

This webpage has alternate versions available in Portugal via the use of the hreflang tag.

Italy HREF LANG

This webpage has alternate versions available in Italy via the use of the hreflang tag.

Chinese HREF LANG

This webpage has alternate versions available in Chinese via the use of the hreflang tag.

Japan HREF LANG

This webpage has alternate versions available in Japan via the use of the hreflang tag.

Korea HREF LANG

This webpage has alternate versions available in Korea via the use of the hreflang tag.

Netherlands HREF LANG

This webpage has alternate versions available in Netherlands via the use of the hreflang tag.

Bulgaria HREF LANG

This webpage has alternate versions available in Bulgaria via the use of the hreflang tag.

Croatian HREF LANG

This webpage has alternate versions available in Croatian via the use of the hreflang tag.

Costa Rica HREF LANG

This webpage has alternate versions available in Costa Rica via the use of the hreflang tag.

Danish HREF LANG

This webpage has alternate versions available in Danish via the use of the hreflang tag.

Finland HREF LANG

This webpage has alternate versions available in Finland via the use of the hreflang tag.

Hungarian HREF LANG

This webpage has alternate versions available in Hungarian via the use of the hreflang tag.

Norway HREF LANG

This webpage has alternate versions available in Norway via the use of the hreflang tag.

Romanian HREF LANG

This webpage has alternate versions available in Romanian via the use of the hreflang tag.

Slovak HREF LANG

This webpage has alternate versions available in Slovak via the use of the hreflang tag.

Turkey HREF LANG

This webpage has alternate versions available in Turkey via the use of the hreflang tag.

Ukrainian HREF LANG

This webpage has alternate versions available in Ukrainian via the use of the hreflang tag.

Saudi Arabia HREF LANG

This webpage has alternate versions available in Saudi Arabia via the use of the hreflang tag.

Farsi - Persian HREF LANG

This webpage has alternate versions available in Farsi - Persian via the use of the hreflang tag.

Galician HREF LANG

This webpage has alternate versions available in Galician via the use of the hreflang tag.

Hebrew HREF LANG

This webpage has alternate versions available in Hebrew via the use of the hreflang tag.

Hindi HREF LANG

This webpage has alternate versions available in Hindi via the use of the hreflang tag.

Indonesian HREF LANG

This webpage has alternate versions available in Indonesian via the use of the hreflang tag.

Malay HREF LANG

This webpage has alternate versions available in Malay via the use of the hreflang tag.

Brazil HREF LANG

This webpage has alternate versions available in Brazil via the use of the hreflang tag.

Serbian HREF LANG

This webpage has alternate versions available in Serbian via the use of the hreflang tag.

Vietnamese HREF LANG

This webpage has alternate versions available in Vietnamese via the use of the hreflang tag.

HongKong HREF LANG

This webpage has alternate versions available in HongKong via the use of the hreflang tag.

Taiwan HREF LANG

This webpage has alternate versions available in Taiwan via the use of the hreflang tag.

Philippines HREF LANG

This webpage has alternate versions available in Philippines via the use of the hreflang tag.

Belgium HREF LANG

This webpage has alternate versions available in Belgium via the use of the hreflang tag.

Brunei Darussalam HREF LANG

This webpage has alternate versions available in Brunei Darussalam via the use of the hreflang tag.

Denmark HREF LANG

This webpage has alternate versions available in Denmark via the use of the hreflang tag.

Urdu HREF LANG

This webpage has alternate versions available in Urdu via the use of the hreflang tag.

SSL Certificates

HSTS

Forces browsers to only communicate with the site using HTTPS.