For your chatbot we recommend that you place the bulk of your Javascript work in a proper Javascript file and keep your Rivescript "objects" very simple.
Your Rivescript file could simply call a Javascript function like below.
Notice how this will run the getRandomTerm() function, like the one below, that can be in your code.js file.
The chain of returns: The Javascript function will return the "term" (in this case) to the Rivescript object, which will then return that value to your script file
Placing JavaScript in a proper .js file produces the familiar code highlighting that makes your code much easier to write, edit, and debug.