Electron/Angular : How to use typescript component functions/variables in main.js

Question

I am new to angular , electron.

I am trying to use type script component functions/variables in main.js.

I have LicesneController component which holds emailId, I want to call some methods at the time of tool closure which required emailId(stored in loginCompoenent).

I tried several ways to achieve this :

1. Local and session storage: Not worked as they cannot be used at client side. : giving error as localStorage is not defined
2. Include LicesneController module in main.js const { LicenseController } = require('./src/lib/LicenseController'); : giving Exception as Cann't find module

Question is :

• why #2 is not working any reason (all the paths are correct) ?
• Is there any other way to achieve this scenario ?
• If we are using node local storage , how we can hold values set in ts file and use in js file for node local storage.