Once you have DotEnv installed and configured, make a file called. So make sure you check the documentation for any packages or providers you are using before you follow any advice in this article.
Note that some packages such as Create React App already include DotEnv, and cloud providers may have different means of setting environment variables all together. Then in your app, require and configure the package like this: require('dotenv').config().
To use DotEnv, first install it using the command: npm i dotenv. How to Use DotEnvĭotEnv is a lightweight npm package that automatically loads environment variables from a. To create environment variables in your Node app, you will probably want to use a package like DotEnv. While this is a neat experiment, you would not use the Node REPL like this in an app. (A quick aside: environment variables are, by convention, generally written in all caps.) To see this in action, you can create your own environment variable right in the Node REPL by appending a variable to the process.env object directly.įor example, to create an environment variable to store the combination on my luggage I could assign the variable like this: _COMBO=“12345”. How to Create Environment VariablesĮnvironment variables are supported out of the box with Node and are accessible via the env object (which is a property of the process global object.) In Node, environment variables are a great way to securely and conveniently configure things that don't change often, like URLs, authentication keys, and passwords. Environment variables are variables that are set outside of a program, often through a cloud provider or operating system.
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