Likely it is the JavaScript. It looks like many of the code blocks are live, using Klipse[0], which is a multi-language client-side code evaluator. It's not Clo

Likely it is the JavaScript. It looks like many of the code blocks are live, using Klipse[0], which is a multi-language client-side code evaluator. It's not ClojureScript specific. [0]: https://github.com/viebel/klipse https://github.com/viebel/klipse Edit to add: it is written in ClojureScript, however.