cdnjs is a free distributed JS library delivery service.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.

Swiper is a JavaScript library that creates modern touch sliders with hardware-accelerated transitions.

SockJS is a browser-based JavaScript library that offers a WebSocket-like communication interface for applications.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

WebSocket is a communication protocol that provides full-duplex communication channels over a single, long-lived connection, enabling interactive communication between web browsers and servers.