List each file in a directory using Node.js? Including child directories?

Here's a function that takes a directory path and recursively gets all the files in it (including child directories):

const getAllFiles = function(dirPath, arrayOfFiles) {
  files = fs.readdirSync(dirPath)

  arrayOfFiles = arrayOfFiles || []

  files.forEach(function(file) {
    if (fs.statSync(dirPath + "/" + file).isDirectory()) {
      arrayOfFiles = getAllFiles(dirPath + "/" + file, arrayOfFiles)
    } else {
      arrayOfFiles.push(path.join(__dirname, dirPath, "/", file))
    }
  })

  return arrayOfFiles
}

Code breakdown:

• Use the readdirSync() method to get all the files and directories in the given directory path.
• We create an array of files (arrayOfFiles) that will hold all the file paths that will be returned when the function is complete.
• Loop over each file or directory that was found. If the item is a directory, the function recursively calls itself to get all the files and sub-directories in that given directory. If the item is a file, we add the file path to the arrayOfFiles array.
• When the forEach() loop is complete, we return the arrayOfFiles. This contains all the file paths.

You can use the function like this:

getAllFiles("path_to_directory")

/* 
[
 '/path/to/file',
 '/path/to/file',
 '/path/to/file',

  . . .

]
*/