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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.

RequireJS is a JavaScript file and module loader.

Prototype is a JavaScript framework originally developed by Sam Stephenson.

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

Alibaba a Chinese e-commerce and cloud computing company.

Alibaba a Chinese e-commerce and cloud computing company.

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

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.

Baidu Promote is the advertising network of the Chinese web services company.

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 between 1 day and 1 month.

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

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

Brotli is a lossless compression algorithm developed by Google.

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/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 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/.

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

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

Transitional version of XHTML.

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.

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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