How to intercept window close event while having access to the Storage class

[mikailcf]

I'm currently in the middle of implementing a feature where I ideally should be able to receive a window will close event in a context where I have access to the Storage class to update a value in the local storage, which I wasn't able to do. I'm gonna elaborate a bit more below on my progress, but any pointers would be great.

I've never worked in an Electron app before so I don't know if I'm missing something basic. A few of my findings so far:

• There's the BrowserWindow's on('closed', ...) method of intercepting, which could be done in window.js. The problem here is that I don't seem to be able to access Storage there. It seems like the window.js code is some kind of "framework code" and the Storage class is some kind of "app code", with no easy way of one requiring/importing/calling the other. (I think there's also the option of just updating the local storage directly in there, which I haven't tested and I'm trying to avoid, to keep the responsibility of updating it through Storage).
• It seems there should be a way to window.require('electron') in the code that has access to Storage, but I get a window.require is not a function error.
• I also tried to expose a function in window.js to store callbacks and call that function somewhere where I have access to Storage, but like in the first point I wasn't able to require window.js.

I have the feeling that there's a more fundamental/architectural concept I'm not grasping here. Again any help would be appreciated!

[mikailcf]

For future reference: I ended up using events to be able to trigger the local storage update from a window event.