my-opendir-watcher/index.js

A custom watcher that emits 'opendir' events when directories are opened

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

class MyWatcher extends EventEmitter {
  constructor() {
    super();
  }

  openDirectory(dirPath) {
    this.emit('opendir', dirPath);

    try {
      const files = fs.readdirSync(dirPath, { withFileTypes: true });
      return files.map((f) => ({
        name: f.name,
        isDirectory: f.isDirectory(),
      }));
    } catch (err) {
      this.emit('error', err);
      return [];
    }
  }
}

module.exports = MyWatcher;