Jmonkey is very restricted but handy EDSL for javascript.

It's backend uses free for designing DSL and jmacro for interpreter.

Here is some examples.

Click btn element then add "clicked" class to target elements.

btn <- select (Id "btn")
target <- select (Class "target")
onClick btn $ add target (Class "clicked")

If target element(s) have "hide" class then remove, otherwise add "hide" class.

ifel (Having target (Class "hide"))
     (remove target (Class "hide"))
     (add target (Class "hide"))

Once you define some actions like aboves, you can get javascript string easily by interpretString.