dotenvx get KEY --convention=nextjs

Return a single environment variable's value using the Next.js convention

$ echo "HELLO=development local" > .env.development.local
echo "HELLO=local" > .env.local
echo "HELLO=development" > .env.development
echo "HELLO=env" > .env
echo "console.log('Hello ' + process.env.HELLO)" > index.js

dotenvx get HELLO --convention=nextjs
development local

You can also set DOTENV_CONFIG_CONVENTION=nextjs.

$ DOTENV_CONFIG_CONVENTION=nextjs dotenvx get HELLO
development local