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Node js

How to run a Node js file

Sometimes it’s the obvious things that trip you up….. I went through the process of installing and setting up Node js, created my first Node app and all was fine. When I came back to that project a few weeks later (Node.js is something I use intermittently) I couldn’t remember how to start the Node js server. After Googling “how to run Node js file” I found loads of others asking the same question. So, whether you want to run your Node js file in Terminal, or in Command, or in the Visual Studio Code terminal here’s how you do it.

  1. Open your Terminal / Command / Git Bash / Visual Studio Code Terminal window
  2. Change the location to your node project
  3. Type node filename.js

And that’s all there is to it. So if your file is called app.js you would type node app.js. If your file is called search.js then you’d type node search.js.

If you need a little more info than that to set up your project and run the Node js file, then check out the info here. However this does still presume that you already have Node installed…..

How to check if you have Node installed

Yep, I have had to do this on more than one occasion too. In order to check if you have Node js installed, or how to check your Node js version, follow these steps:

  1. Open your command line tool (as above, Terminal, Command, Git Bash etc.)
  2. Type node -v
  3. This will print a version number if you do have node installed

You can see in this image the line where I’ve typed node -v and then pressed return, and then the subsequent response of the version number. You can use this for any npm package as well by typing packagename -v to find out if it’s installed, and if so, what version you have.

how to check if you have node installed or check your node js version