check for non used files in nodejs project

index.js

const { resolve } = require('path');
const { readdirSync, lstatSync } = require('fs');

async function getFiles(dir) {
  const dirents = readdirSync(dir, { withFileTypes: true });
  const files = await Promise.all(dirents.map(dirent => {
    const res = resolve(dir, dirent);

    return lstatSync(res).isDirectory() ? getFiles(res) : res;
  }));

  return Array.prototype.concat(...files);
}

setTimeout(async() => {
  const files = await getFiles(__dirname);
  const notLoaded = [];
  files.forEach(file => !require.cache[file] ? notLoaded.push(file): '');
  console.log(notLoaded);
}, 5000);