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To run your 'app.js' file with Node.js. Open your terminal right inside VS Code by selecting View Terminal (or select Ctrl+`, using the backtick character). If you need to change the default terminal, select the dropdown menu and choose Select Default Shell. In the terminal, enter: node app.js. You should see the output: 'Hello World'. Make sure that you use the user login that you’ve used to set up and do the initial run of Node-RED. You can use an “At startup” trigger to always run Node-RED at system startup. Use the Action “Start a program” with details set to C:UsersAppDataRoamingnpmnode-red.cmd (replacing with your actual user name).

Node.js is required for using many JavaScript tools and for creating server-side JavaScript applications. Here is how you install Node.js on a Mac.

The first thing you should do is check to see if you have a version of Node.js already installed. To do that:

  1. Open the Terminal by pressing Command+Space to open Spotlight Search and entering Terminal then pressing Enter.
  2. Enter node - v in the Terminal and press Enter.
  3. If you do have Node.js installed, it will output the version.
    1. Update to the latest version using npm i -g npm. If you get a bunch of checkPermissions warnings, you should run the command as the superuser like this: sudo npm i -g npm
    2. You now have the latest version installed. You do not need to continue with these instructions.
  4. If you do not have Node.js installed, it will output something like -bash: node: command not found. Continue with these instructions to install it.
  5. Go to nodejs.org. You'll see download links for MacOS. If you are using Node.js for a Webucator class, you should select the LTS version. The Current version has the latest features, but may be more prone to changes and bugs than the LTS (Long Term Support) version.
  6. When the file finishes downloading, locate it in Finder and double-click on it.
  7. Go through the entire installation process.
  8. When installation is complete, open the Terminal by pressing Command+Space to open Spotlight Search and entering Terminal then pressing Enter.
  9. Enter node - v in the Terminal to verify that Node.js is installed correctly and to see the version of Node.js that was installed.

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If a version was output, then you're all set.

By Panu Pitkamaki

Development is picking pace, and Node.js is shipping out a new version frequently. It is nice to have the latest version at hand in your development environment to test out new features.

There are a few ways to install Node.js. One of the obvious ones is to download the installer from nodejs.org. However, you might not want to be downloading a new installer every time there's a new version out.

Here are few alternative ways to update to the latest version of Node.js on a Mac.

Nvm

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Nvm is a script-based node version manager. You can install it easily with a curl and bash one-liner as described in the documentation. It's also available on Homebrew.

Assuming you have successfully installed nvm. The following will install the latest version of node.

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The last option installs all global npm packages over to your new version. This way packages like mocha and node-inspector keep working.

N

N is an npm-based node version manager. You can install it by installing first some version of node and then running npm install -g n.

Assuming you have successfully installed n. The following will install the latest version of node.

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Homebrew

Homebrew is one of the two popular package managers for Mac. Assuming you have previously installed node with brew install node. You can get up-to-date with formulae and upgrade to the latest Node.js version with the following.

MacPorts

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MacPorts is the other package manager for Mac. The following will update the local ports tree to get access to updated versions. Then it will install the latest version of Node.js. This works even if you have a previous version of the package installed.

There also exists nodejs alternative to nodejs-devel that follows the long term support line.