Tutorial: Get started with Node.js on Mac (Beginner)

May 7, 2012

This is a guide on how to get up and running with Node.js on Mac OS X. The purpose of this tutorial is to be a reference post for other tutorials because when you have done it once, then you will probably not need to do it again. So I feel it's unnecessary to include it all the time. Plus, it's probably very basic for most of you. However, if it is the first time you do it or need to freshen up your memory, then I hope you will find this helpful. ##GOALS## After having gone through this, we will have: * a working installation of [Node.js](http://nodejs.org) * a working installation of [Node Package Manage (NPM)](http://npmjs.org) * created a minimalistic webserver instance ##LET'S GET STARTED## The first thing we need to do is to install Node.js. Depending on what you have available on your system already, this can be done in a few different ways. I'll go through them one by one. **1. Install using Macports** If you have [macports](http://www.macports.org/) installed then you can simply install node by opening a terminal and enter the command: ```language-shell $ port install nodejs ``` Note that since Macports is by default installed in /opt/local so it is often required to prepend the command with `sudo` **2. Install using Homebrew** If you have [homebrew](http://mxcl.github.com/homebrew/) installed then you can similarly install node by opening the terminal and enter the command: ```language-shell $ brew install node ``` Unlike macports, homebrew is most often configured in a way that you will not need the `sudo` command when installing. However, there are exceptions... **3. Install from package** The third option is to go to [nodejs.org/#download](http://nodejs.org/#download) and download the Macintosh installer package. Once it is downloaded, open the package and follow the instructions. **Verify installation** Lastly, whatever method you chose to install by, we need to make sure everything went okay with the installation. Open up a terminal and type the following command: ```language-shell node -v ``` Which should output something like this: ```language-shell v0.6.16 ``` As you can see, at the time I'm writing this, the latest version is 0.6.16. But as long as you get any version output then it's successful. ##NODE PACKAGE MANAGER## The next step is to install npm which as it's name suggests, handles the packages that you can add to your projects. Oh wait... this is not like in the early days of node anymore. Npm actually comes bundled with the Node installation as of v0.6.3. > " Then why the hell did you split it up in different steps in your tutorial? " Well, actually it is only included if you installed node by using the package alternative. Otherwise you will have to install it separately by either of these commands: ```language-shell port install npm ``` or ```language-shell brew install npm ``` Once this is done we will verify the installation in the same way we did with node. Open up a terminal and type the following command: ```language-shell npm -v ``` Which should output something like this: ```language-shell v1.1.20 ``` ##CREATE NODE PROJECT## Now that we're done with the configuration and stuff, let us at least do something to prove that it is working. Start with creating a new file called `app.js` and add the following lines of code: ```language-js var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('How you doin?\n'); }).listen(3000, ''); console.log('Server running at'); ``` And then start the server by running the following command: ```language-shell node app.js ``` To verify that it is working, open a browser and go to http://localhost:3000/ which should show you the resulting message "How you doin?". And that is how it's done! If you encounter any problems along the way, please leave a comment and I will try to help out or clarify my instructions further.