Handling global state the functional way? -

in complex interactive app (say video game or web app), how manage global state in functional way? article below recommends "simply return statements happened." presumably, other component, applicationstate, should both hold state , manage interaction between different components. unfortunately, no concrete examples given, , i'm @ loss functional version of applicationstate should like. i'm using functional reactive programming (frp) , javascript.

http://prog21.dadgum.com/26.html