modifying requires

index.js

exports.api = {}
exports.initializer = require('./initializer.js')
exports.main = require('./main.js') // comment me out and everything is fine

initializer.js

const {api} = require('./index.js')

exports.initialize = () => {
  api.initializerStuff = { cool: true }
}

main.js

const {api, initializer} = require('./index.js')

api.mainStuff = {
  cool: true
}

initializer.initialize()

module.exports = () => {
  console.log({api})
}