Megajs 0.17.2版本root属性失效问题咨询

I'm working with MegaJS v0.17.2 in a Node.js application, and I'm stuck on an issue where the root property isn't showing up on my Storage (megaDB) object as expected. Here's the code for my initialization function:

async function initMega(){
 const { Storage } = require('megajs');
 try {
  let megaDB = new Storage({ email: process.env.MEGA_EMAIL, password: process.env.MEGA_PASSWORD });
  megaDB.on('ready', () => {
   console.log("MEGA filesystem loaded.");
   console.log(Object.keys(megaDB)); // Expected to see inbox, trash, root here
   // root = megaDB.root; This line fails because root doesn't seem to exist
  });
  console.log("MEGA connected");
  return megaDB;
 } catch (err) {
  console.error("Mega failure: " + err);
  setTimeout(initMega, 3000);
 }
}

When the ready event fires, I log the keys of megaDB but root is missing entirely. Trying to access megaDB.root directly also doesn't work. Does anyone know why this is happening?

Possible Solutions & Debugging Steps #

Hey there, let's break down what might be going on here:

1. The root property is likely non-enumerable

Object.keys() only returns enumerable properties of an object. Many libraries intentionally make core properties non-enumerable to avoid cluttering logs or accidental overwrites.

Try modifying your ready event handler to check for root directly and list all properties (including non-enumerable ones):

megaDB.on('ready', () => {
  console.log("MEGA filesystem loaded.");
  // Check all own properties (including non-enumerable)
  console.log("All properties:", Object.getOwnPropertyNames(megaDB));
  // Try accessing root directly even if it doesn't show up in Object.keys()
  console.log("Root object:", megaDB.root);
});

Chances are, megaDB.root will exist even if it doesn't appear in Object.keys().

2. Timing issues with returning the Storage object

Your current initMega() function returns megaDB immediately after creating it, but the ready event fires asynchronously. If any code calls initMega() and tries to access root before the ready event triggers, it will be undefined.

Wrap the Storage initialization in a promise to ensure you only return the object once it's fully ready:

async function initMega(){
  const { Storage } = require('megajs');
  try {
    return new Promise((resolve, reject) => {
      const megaDB = new Storage({ 
        email: process.env.MEGA_EMAIL, 
        password: process.env.MEGA_PASSWORD 
      });

      megaDB.on('ready', () => {
        console.log("MEGA filesystem loaded.");
        console.log("Root is available:", !!megaDB.root);
        resolve(megaDB);
      });

      // Handle errors properly in the promise
      megaDB.on('error', (err) => {
        console.error("Mega ready error:", err);
        reject(err);
      });

      console.log("MEGA connection initiated");
    });
  } catch (err) {
    console.error("Mega failure: " + err);
    // Retry after 3s, but make sure to return the retry promise
    return new Promise(resolve => setTimeout(() => resolve(initMega()), 3000));
  }
}

// Usage:
// const megaDB = await initMega();
// Now you can safely access megaDB.root

3. Check for version-specific API changes

MegaJS has had minor API tweaks across versions. In v0.17.2, it's possible that root is accessed via a method instead of a direct property (e.g., megaDB.getRoot()). Try logging the entire megaDB object to inspect its methods and properties:

megaDB.on('ready', () => {
  console.log("Full Storage object:", megaDB);
});

Look for any methods or properties that reference the root directory.

内容的提问来源于stack exchange，提问作者sewwes1