Node.js中Import与Require问题：csvtojson导入失败求助

Hey there! Let's break down why your ES module import isn't cooperating with csvtojson while the CommonJS require works flawlessly. Here are the most likely issues and their fixes:

1. You're targeting the wrong export type #

When you use const csv = require('csvtojson'), you're pulling in the module's default export. But import { csv } from 'csvtojson' tries to grab a named export called csv—which doesn't exist in this package. The two syntaxes don't map directly here.

Fix: #

Use the default import instead, which matches what require does:

import csv from 'csvtojson';

This works because require() always returns the module's module.exports, which translates to the ES module's default export.

2. Node.js is treating your file as a CommonJS module #

Node.js defaults to treating .js files as CommonJS modules. If you use import without explicitly enabling ES modules, Node will throw an error.

Fixes: #

• Option 1: Enable ES modules project-wide
  Add "type": "module" to your project's package.json at the top level:

  {
    "type": "module",
    // ... rest of your package.json content
  }
  

  This tells Node to interpret all .js files in your project as ES modules.

• Option 2: Use the .mjs file extension
  If you don't want to change the whole project's module system, rename your file from filename.js to filename.mjs. Node automatically recognizes .mjs files as ES modules.

3. Your Node.js version lacks proper ES module support #

Older Node.js versions (pre-v14) had experimental or limited support for ES modules. If you're running v12 or earlier, even correct import syntax might fail.

Fix: #

Upgrade to a LTS (Long-Term Support) version of Node.js (v14.x or newer). Check your current version with:

node -v

Quick Troubleshooting Checklist #

1. Replace import { csv } from 'csvtojson' with import csv from 'csvtojson'
2. Confirm your package.json has "type": "module" (or use .mjs files)
3. Ensure you're running Node.js v14 or later

After trying these steps, your import statement should work just like require did!

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