How Do I Efficiently Get a Directory\'s File List in Node.js?

Getting a File List in Node.js Made Easy

Node.js provides multiple methods for retrieving a list of file names within a directory, each with its own unique characteristics.

Using fs.readdir

The fs.readdir method offers an asynchronous solution. To utilize this method, you must provide a callback function to handle the list of files once they have been retrieved.

const fs = require('fs');
const folder = './tests/';

fs.readdir(folder, (err, files) => {
  files.forEach(file => {
    console.log(file);
  });
});

Using fs.readdirSync

For those who prefer a synchronous approach, there is the fs.readdirSync method. This method will immediately return the file name array, but it's important to note that it can block the execution of your code until the read process is complete.

const fs = require('fs');
const folder = './tests/';

const files = fs.readdirSync(folder);
files.forEach(file => {
  console.log(file);
});

The key difference between these methods lies in their asynchronous and synchronous nature. If quick execution is crucial, fs.readdirSync may be more suitable. Otherwise, the asynchronous fs.readdir technique offers greater flexibility in handling file retrieval.

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