MeteorJS报Unexpected token import错误，自定义包开发求助

Hey there, let's troubleshoot that Unexpected token import error you're hitting with your Meteor package! This is a super common hiccup when working with ES modules in Meteor packages, so let's walk through the most likely fixes step by step:

1. Double-check your package.js ES module configuration #

Meteor requires explicit setup to handle ES module syntax (import/export) in packages. Make sure your package.js includes these critical bits:

Package.describe({
  name: 'mypkg',
  version: '0.0.1',
  summary: 'Your package summary'
});

Package.onUse(function(api) {
  // Use a Meteor version that supports ES modules (2.0+ is safe)
  api.versionsFrom('2.0');
  // Required to enable ES module support
  api.use('modules');
  
  // Point to your main module(s) – use this if you have a single entry for client/server
  api.mainModule('mypkg.js', ['client', 'server']);
  
  // OR, if you separate client/server code:
  // api.mainModule('client/main.js', 'client');
  // api.mainModule('server/main.js', 'server');
});

If you're using api.addFiles instead of api.mainModule, you need to explicitly mark files as ES modules:

api.addFiles('client/main.js', 'client', { esModule: true });

2. Verify your Meteor version #

Older Meteor versions (pre-2.0) have limited or broken ES module support. Run meteor --version to check your version. If it's below 2.0, upgrade with:

meteor update

3. Check for syntax issues in your code #

• Ensure your import statements follow standard ES module syntax (e.g., import { Meteor } from 'meteor/meteor'; – no typos!)
• Avoid mixing CommonJS (require) and ES module (import) syntax in the same file, even though Meteor supports it in some cases – this can cause unexpected parsing errors.

4. Confirm your package is added to the app #

Don't forget to add your package to your Meteor app from the project root:

meteor add mypkg

If it's not added, Meteor won't process the package's code properly, leading to parsing errors.

If you've gone through all these steps and still see the error, share snippets of your package.js and the exact line of code throwing the error – that'll help narrow down the issue even faster!

内容的提问来源于stack exchange，提问作者christopher_pk