read these values, there are a couple of options, but the easiest is to use the dotenv package from npm. env in your project and slap your variables in there on different lines. env files allow you to put your environment variables inside a file. According to every architect I’ve ever sat in a meeting with, “scaling” is more important than the application even working. doesn’t scale, and everyone wants to scale. It would look like you are hoarding configuration values, and someone who loves you could stage an intervention and that would be awkward for everyone involved. If you had a connection string, you probably wouldn’t want to start passing multiple variables on the terminal. Now to use the variable in your code, you would use the process.env object. Between the two of us he’s the one who knows what he’s doing. How do I know that? Because Liran Tal told me in the comments. How does anybody know anything? But you can only go as high as port 65534 for a web app because that’s the highest port Chrome will connect to. How do I know that? StackOverflow of course. For instance, if you were running an Express app and wanted to pass in the port, you could do it like this… PORT=65534 node bin/wwwįun fact: port 65535 is the largest TCP/IP network value available. You can pass environment variables on the terminal as part of your Node process. Here are some of the different ways you can define and then read environment variables in your Node applications. Quoting yourself is the pinnacle of delusionīut how do you use these variables in your Node application? I had a hard time finding good resources on this with the requisite amount of Java jokes, so I decided to create one. Node environment variables work much the same was as settings in a web.config - they’re a way for you to pass in information that you don’t want to hard code. NET before, you might be familiar with something like a web.config file. In this context, environment variables are really more like “Configuration Settings.” See how much nicer that sounds? For instance, if you had a web application, you might have environment variables that define: In Node, environment variables can be global (like on Windows), but are often used with a specific process that you want to run. Does it go in PATH or JAVA_HOME or both? Do I need to end it with a semicolon? WHY AM I USING JAVA? KILL_ME Just the words “Environment Variable” trigger a PTSD-laced flashback in which I am trying to add the correct path to the Java Home directory on Windows. Maybe because they are called “Environment Variables.” Environment variables are a fundamental part of Node development, but for some reason I never bothered with learning how to properly use them.
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