.env.development

The .env.development file is a specialized configuration file used by developers to manage environment-specific variables during the local development phase of a software project. It allows developers to define keys and values—such as local database credentials or development-only API keys—without hard-coding them into the application. Core Purpose of .env.development

What is .env.development?

The validation script checks that required .env.development keys exist before the app starts. .env.development

const path = require('path');
require('dotenv').config(
  path: path.join(__dirname, `.env.$process.env.NODE_ENV`)
);

Next.js (13+)

Next.js loads .env.development automatically during next dev. Variables are inlined at build time. To expose to the browser, prefix with NEXT_PUBLIC_. require('dotenv').config( path: path.join(__dirname