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JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

Vue.js is a JavaScript library for building interactive web interfaces, based on the Model View ViewModel pattern.

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the visitors browser.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

React is an open source JavaScript library for building user interfaces, developed by Facebook.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

Huawei is a Chinese multinational technology corporation, also offering cloud computing services.

China Mobile is a Chinese state-owned telecommunication corporation.

China Unicom (formerly China Netcom) is a Chinese telecom operator, also offering web hosting services.

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

Huawei is a Chinese multinational technology corporation, also offering cloud computing services.

China Mobile is a Chinese state-owned telecommunication corporation.

China Unicom (formerly China Netcom) is a Chinese telecom operator, also offering web hosting services.

Alibaba is a Chinese e-commerce and cloud computing provider.

Tencent is a Chinese IT and telecommunication services provider. This includes its QQ and other brands.

Certum (formerly Unizeto) is a Polish SSL certificate authority owned by Asseco.

Baidu Analytics (Tongji) is a web analytics service by Baidu.

Microsoft Clarity is a website visitor tracking tool.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Persistent cookies with an expiration time of up to 1 day.

Persistent cookies with an expiration time between 1 and 10 years.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Secure cookies are used only via an encrypted connections, which may increase security.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

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