#NODEJS ENVIRONMENT VARIABLES CODE#
Sensitive data like API keys should not be in the source code or known to persons who do not need access to those external services. Some common examples are:ĭatabase, cache, and other storage connection informationįor example, in a development environment, your app will point to a test API URL, whereas in a production environment your app will point to the live API URL. These changes are independent of code changes, so they do not require your application to be rebuilt to change.ĭata that changes depending on the environment your app is running on should be set as environment variables. By relying on external configurations, your app can easily be deployed in different environments. Typically, our applications require many variables to be set in order for them to work. Why use an Environment variable?Įnvironment variables are excellent for decoupling application configurations. If you open the terminal or command line application in Linux, Mac OS, or Windows and enter set, you will see a list of all environment variables for your user. An environment variable is simply a name mapped to a value.īy convention, the name is capitalized e.g.PORT=3000. Create Backend Server in index.js file using the express packageĮnvironment variables are variables external to our application which reside in the OS or where the container of the app is running in.Create Node Application into your system.Separate configurations make it easier for our application to be deployed in different environments. We need to ensure each environment is configured correctly, it could be disastrous if our production application was using our development database, for example.Įnvironment variables allow us to manage the configuration of our applications separate from our codebase. Many apps are deployed in a development environment before being deployed to the production environment.
#NODEJS ENVIRONMENT VARIABLES HOW TO#
How to use the Environment variables in the project?ĭeploying an application requires developers to put thought and consideration into how it is configured.Here one of the use cases for the cloud hosts we can set an environment variable named PORT which allows us specifies a value that corresponds to port number the server should listen in order to work properly. by default allows us to use environment variables, we can access them from UI or by using Node.js modules. Working with environment variables is a great way to configure different aspects of your Node.js application. Hello Guys, Today I will explain how to access the Environment variable in the Node js project.
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