What powers zfdl-krefeld.de?

JavaScript frameworks

Stimulus

since Feb 2026

JavaScript graphics

D3 v3.5.17

since Feb 2026

JavaScript libraries

jQuery v3.2.1

since Feb 2026

jQuery UI v1.12.1

since Feb 2026

Miscellaneous

Open Graph

since Feb 2026

Operating systems

Ubuntu

since Feb 2026

Performance

Turbolinks

since Feb 2026

Programming languages

Ruby

since Feb 2026

UI frameworks

Bootstrap v4.0.0

since Feb 2026

Web frameworks

Ruby on Rails

since Feb 2026

Web servers

Nginx v1.10.3

since Feb 2026