🚀 Fixing dotenv in Node.js ES Modules: Why Environment Variables Show undefined and How to Solve It

Sep 12, 2025 · 3 min read · If you’ve ever worked with Node.js, dotenv, and ES Modules (import syntax), you may have faced this frustrating problem: 👉 Even after adding dotenv.config() at the very top of your code, your .env variables still show up as undefined in your config ...