List children imported modules (paths) of a module

list-module-children.js

function listModuleChildren (parent_path) {
  const parent_mod = require.cache[parent_path]

  let children = []

  ;(function run (mod) {
    if (mod.children.length) {
      for (let i = 0; i < mod.children.length; i++) {
        const id = mod.children[i].id
        if (!children.includes(id)) {
          children.push(id)
          run(mod.children[i])
        }
      }
    }
  })(parent_mod)

  return children
}