Get all files in a folder recursively using Node JS using Generators

This function will help us to get all the files inside a folder, even if the folder has folders inside.

This function is using function* and yield, you can find more information related to generators and yield.

This function does:

1. Read all the files of the first level of the folder.
2. Then iterate over all the files inside, including files and folder.
3. Under the iteration, it validates if the node is a folder o a file.
4. If is a folder, we recursively call this same function, under the actual dir.
5. If is not a folder, we attach the result to the yield result.

const fs = require('fs');
const path = require('path');

// Definition
function *matchSync(dir) {
  const files = fs.readdirSync(dir, { withFileTypes: true });
  for (let i = 0; i < files.length; i++) {
    if (files[i].isDirectory()) {
      yield* matchSync(path.join(dir, files[i].name));
    } else {
      yield path.join(dir, files[i].name);
    }
  }
}

// Usage
for (let i of matchSync(__dirname)) {
  console.log(i);
}

Happy Coding!