You will be able to use the same source code in both situations. In this way, you don't need to edit your source code in development and production. You can do this by using different environment variables. During development, your program might use a test database but in the production environment, it will use the main database. It also provides a secure way to store sensitive data rather than putting that information directly in the source code.įor example, you can use different databases or accounts for different instances of a program by setting environment variables. Why Should You Use Environment Variables?Įnvironment variables allow setting values that are used by processes in different environments like development or production. That means, to set an environment variable you have to define a key with a value assigned to it. In simple terms, Environment variables are managed and stored by an operating system so that any program can use access them.Īn environment variable is made up of a key-value pair format. What are Environment Variables?Įnvironment variables are values that are set outside the program and they directly affect the way running processes behave in a computer. So, keeping it out of the way let's get started. I try to explain everything in detail so that it becomes easy for you. Basic knowledge of JavaScript and Node.js to create a server.Access to a package manager like npm or yarn.But to understand this lesson properly, you should have the following: After reading this, you will not face any problems on this topic.
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