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See full list on treehouse.github.io. The Missing Package Manager for macOS (or Linux). It's all Git and Ruby underneath, so hack away with the knowledge that you can easily revert your modifications and merge upstream updates.

Facebook - GitHub - Google+ - Li. Aug 11, 2020 Use the below method to check whether Node js working correctly or not by using below commands. # node # console.log('hello world') # hello world # undefined. Press ‘control’ + ‘c’ twice to come out from the node terminal. Run the following command to check the node version. # node -v # v10.15.3.

Since node.js is the new cool kid on the block, I want to write a really short introduction how to install it on Mac OS X and start playing with it.
Exploring technologies is something I try to fit in my everyday, that’s why I’m choosing the verb playing. This little and quick guide is really more for everyone who has more experience with PHP than with ruby or python. I don’t even want to talk to you ruby on rails people, you know how all this stuff works, shoo!

Homebrew

Not only for node.js, but a powerful tool that every developer on Mac OS should have or have heard of: homebrew. So head on and install it, because it allows you to install node.js with one command (Terminal phobics, don’t worry, it’s short!) and gets you going on setting up your testing environment.

Getting node.js

To install node.js on your machine, you simply type:

That’s it. You watch a short process of download and build, which has not failed the couple of times I’ve tried it on both Mac OS 10.6 and 10.7, but don’t close that Terminal quite yet.

Running node.js

For running node.js you actually need to run a process in your shell or make something run the process for you. For now, we’ll stick to having the Terminal window open.
How to Node has a very comprehensive guide how to send output to a browser, by making node start an http server and listen for requests. Requests, as in every web capable programming language are important in node.js and you’ll be hearing a lot more about this request object in the future.

So what you don’t need to do is to define a directory, like you know from apache or lighttpd servers. You can create a node project in any folder on your system, go there in a Terminal window and run your .js file with node filename.js, followed by hitting ENTER.

Example:

Let’s say we wanted to use the hello world example, we’d shamelessly copy paste the code into our text editor and save it in a folder called nodetests. Now with the Terminal we type something like:

Now we have a running node server on the specified port, that will output Hello World on a specified address. You can see the output by pointing your browser to http://localhost:3000 and it should say: Hello World.

Going back to your editor and changing some lines will have absolutely no effect right now, because node does not check for file changes by default. So even if your file would now output `Hello Moon`, the node server still thinks that it should output `Hello World`, because it was that the last time it checked.

To prevent you from undergoing the horrible task of changing to your Terminal window, pressing

every time you make a change you want to preview, there actually is a way to skip that.

Using node-dev instead of node, automatically restarts your server, whenever it notices a file changed. That’s way cooler and feels a lot more like developing PHP suddenly. It’s not bad to feel a little at home when you start on frighteningly seeming complex stuff like node.js.

NPM: the node package manager

NPM is what apt is for debian or gem for ruby. It’s the universal tool for getting stuff and also packing stuff up in neat and reuseable modules.
Taking a look at the amazing list of modules available and also their own repository site, you will quickly understand why you will want to use it.
By simply typing

you’ll install an hmvc framework, make it available for your project and also have the frameworks own tools for debugging, running servers or similar at hand.

Node.js community

I have not personally met anyone who actually has developed with node, but I’ve recently infected another developer with it.
Although I have joined the IRC channel, because I was stuck on some typical node.js beginner issues like correct use of callbacks and understanding how to prevent node.js from spawing 84 processes on resizing 18.8MP images with the imagemagick module. If you don’t watch out, you’re going to do more stuff parallel than you actually intend to and definitely more than your Mac Book Pro can handle without crashing (seriously).
Especially spion helped me and actually restructured some of my code for my understanding, which was pretty amazing of him, also looking at the things he actually has published. Kudos to him.

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Just like any programming language, platform, or library, getting up and running with Node.js takes some initial setup before you can start hacking away. With Node.js, the only initial setup required is, quite simply, getting the binary installed.

In this quick tutorial, we'll take a quick look at how to get Node.js on macOS. Once we've completed the entirety of the tutorial, you'll be ready to take the next step with Node.js.

This guide covers installing Node.js on the following versions of OS X and macOS: OS X 10.10 (Yosemite), OS X 10.11 (El Capitan), and macOS 10.11. These are the versions that are consistently tested and supported by the Node.js build process at the time of writing.

Step 0: The Quick Guide (TL;DR) to Get Node.js Installed on macOS

Here's the abbreviated guide, highlighting the major steps:

1. Go to the Node.js Downloads page
2. Download Node.js for macOS by clicking the 'Macintosh Installer' option
3. Run the downloaded Node.js .pkg Installer
4. Run the installer, including accepting the license, selecting the destination, and authenticating for the install.
5. You're finished! To ensure Node.js has been installed, run node -v in your terminal - you should get something like v6.9.4

Step 1: Download the Node.js .pkg Installer

As our first step, we need to actually get the official installer for Node.js on macOS. To do so, we can head over to the Node.js Downloads page to download the installer.

You can get the macOS installer by clicking the Macintosh Installer option - this will download the .pkg installer for Node.js. Make sure you save it somewhere that you'll be able to access it!

Step 2: Run the Node.js Installer

Now that you've got the installer downloaded, you'll need to run it. The installer is a pretty typical interface - it won't take long to get through it (under a minute), even though there are a few parts to it. You can get through it by following the guide below:

• Introduction
  • Select Continue
• License
  • Select Continue
  • Select Agree
• Installation Type
  • Select Install
  • Authenticate with your Mac to allow the Installation
  • Select Install Software
• Summary
  • Select Close

To verify that Node.js was installed correctly on your Mac, you can run the following command in your terminal:

If Node.js was properly installed, you'll see something close to (but probably not exactly) this:

As one last step for good measure, we'll update your version of npm.

Downgrade Node Mac Os X

Node.js always ships with a specific version of npm - Node.js doesn't (and shouldn't!) automatically update npm. The npm releases aren't synced with Node.js releases. Because of this, there's almost always a newer version of npm than the one that is installed by default with a given version of Node.

To easily update your version of npm, you can run the following command:

Installing Node.js On MacOS Mojave, MacOS Sierra And Earlier OSX

Step 6: Start building with Node.js!

Now you've got Node.js on your Mac. It's time to start exploring!

Thankfully, we've got your back. We've got a ton of articles on getting started with Node.js! If you're interested in exploring ES6, you should check out our article on some of the most exciting ES6 features in Node.js. Looking for ways to standardize your JavaScript code across your team? In that case, you should check out our guide to using ESLint to build code standards in Node.js applications. Maybe you'd just like to start deploying your applications? In that case, check out our guide on deploying Node.js apps with systemd!

That said, if you want to keep in touch with Node.js and the surrounding ecosystem, you should go follow @NodeSource on Twitter! We'll keep you updated with important news from the Node.js project, and share the best Node.js tutorials, guides, and tools that the community has to offer!