How to read all files in a folder with Node.js

const folderPath = path.join(process.cwd(), 'folder-you-want-to-read')

async function readAllFilesInFolder(folderPath: string) {
  const files = await fetchAllFilesInFolder(folderPath)
  return Promise.all(files.map(readFileContents))
}

async function fetchAllFilesInFolder() {
  const dirEntries: fs.Dirent[] = await fs.promises.readdir(folderPath, { recursive: true, withFileTypes: true })
  return dirEntries.filter(entry => entry.isFile())
}

async function readFileContents(file: fs.Dirent): string {
  const filePath = path.join(file.parentPath, file.name)
  return fs.promises.readFile(filePath, { encoding: 'utf8' })
}

(!) Requesting the parentPath from fs.Dirent with Nodejs v20.4.0 always returns undefined. Upgrading to v20.18.0 fixes this issue.