How to use process.env In NodeJS

1. Using process.env:

NodeJS provides access to environment variables through the process.env object. This object contains key-value pairs of environment variable names and their corresponding values. You can access environment variables like any other object property:...

2. Configuration Files:

Create configuration files (e.g., .env) to store environment-specific variables. Use libraries like dotenv to load environment variables from these files into process.env:...

3. Command-Line Arguments:

Pass environment variables as command-line arguments when running NodeJS applications. These arguments can be accessed using process.argv:...

4. Environment-Specific Configurations:

Maintain separate configuration files for different environments (e.g., development, staging, production). Load the appropriate configuration based on the environment:...

5. Using Environment Variables in Packages:

Some packages, such as express, mongoose, and sequelize, allow you to configure settings using environment variables directly:...

Conclusion:

Handling environment variables in NodeJS is crucial for configuring applications across different environments. Whether using process.env, configuration files, command-line arguments, environment-specific configurations, or package-specific settings, it’s essential to manage environment variables securely and efficiently to ensure the robustness and flexibility of NodeJS applications....