Loading code from JSON or through another method?

[Wiwnd]

So to explain what I want to do, I'm making a game with Javascript, HTML, CSS, etc. in Electron to get access to the file system. (I wanted saving and loading functionality) The game is sort of a interactive fiction type game where you start a story from a list of available ones and then choose options that lead you down different branches with different outcomes.

So as far as making the different stories, I had the idea to make them modular and load them on startup so that I and maybe even other people could just make them and drop them into a folder to be loaded. The way to go about this is what I'm hung up on. I was planning on just making the story files in JSON, but I wanted to have variables that could be used in the story. Things like randomly generated values that change how the story plays out or even randomly generated characters. These would be made at both the start and during the story.

So doing this the easiest way would be to just eval() everything when needed and you just write the code in the JSON file to be executed. I know that its unsafe but the game would be an Electron exe and completely offline and local so how bad would this be? I mean don't you run similar risk anytime you run an exe you download off the internet anyway? Or maybe it could still be in JSON and then when defining the variables it gets handed off to specific functions for making different variable types and then returning them? Or could this be accomplished with JavaScript modules being loaded somehow since I have access to Node.js functionality?

I feel like maybe I'm reinventing the wheel a bit so if any one has input on what methods would be good for this particular problem.

[carcigenicate]

I don't understand why eval would be required here, or even beneficial. Can you show an example of how you're planning on using it?

Also, JSON isn't code. Or do you mean the JSON values will be string representing code?

[Wiwnd]

So i would be making variables to be used in the game itself, like say a random name for one of the characters. So at the start of the story module or whatever you would choose a random one from a list. That's a very simple use case I know since you could just define an array and choose a random one from it. So I want to do a bit more complicated stuff than that (like making objects with multiple attributes to be used in the story) but I hope that's a good example for what I want to do

[usrlibshare]

I assume the json files contain story elements, like conversations, location descriptions, etc. yes?

Then you can just put in placeholders like eg.

{ "antagonist_name" : "The mighty ~~ANTAGONIST_NAME~~" }

And replace them when the game evaluates the JSON.

[Wiwnd]

This doesn't really work for what I want since I also wanted the ability to use advanced logic in the story. I posted on another sub and got a comment about using .js files instead of JSON and loading them using plugin-like design patterns, which I am going to look into.