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

RequireJS is a JavaScript file and module loader.

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

Cloudflare Server is a web server developed by Cloudflare.

Ubuntu is a Linux distribution.

Yandex is a Russian provider of internet-based services and products.

Yandex is a Russian provider of internet-based services and products.

Cloudflare provides a content delivery network.

Cloudflare provides DNS servers and other web services.

Yandex is a Russian provider of internet-based services.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

jsDelivr is a service for hosting JavaScript files.

unpkg is a JavaScript content delivery network for libraries that use the npm package manager.

Yandex Libraries Hosting provides hosted JavaScript libraries, provided by Yandex.

Yandex.Metrica is a free web analytics system combining customizable reporting tools with behavioral analytics.

LiveInternet is a Russian web access counter service.

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.

Gzip (GNU zip) is a file compression algorithm.

HTTP/2 is the second major version of the HTTP network protocol.

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

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

Zstandard is a lossless data compression algorithm developed by Yann Collet at Facebook.

HTTP/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol.

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.

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

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