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.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Responsive navigation plugin without library dependencies and with fast touch screen support.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.