How to determine whether Node.js has been downloaded and installed

As a front-end developer, using Node.js is definitely very common. But for some newbies, they may not know what Node.js is or how to tell whether Node.js has been installed. In this article, I will introduce some methods to determine whether Node.js has been downloaded and installed.

First, we need to know what Node.js is. Node.js is a platform based on the Chrome JavaScript runtime that allows developers to write command-line tools and server-side code using JavaScript. Node.js also works as a build tool, so it's great for web developers.

Now, let’s take a look at how to determine whether Node.js has been installed.

Method 1: Check through the command line

In the command line terminal, enter the following command:

node –v

If Node.js is installed, the version number of Node will be output . If the output is not a version number, you need to install Node.js. Here, we recommend using the official website to download the appropriate software package for your operating system for installation to ensure a successful installation and get the latest version.

Method 2: By viewing the application

Another simple method is by viewing the application. In the Windows operating system, you can check whether there is Node.js software in "Control Panel > Uninstall a Program". If there is, Node.js has been installed.

On Mac OS X system, you can check whether there is a Node.js application in Launchpad. If not, you need to install it.

Method 3: Check the package manager

If you have used a package manager, such as npm or Yarn, you can also check whether Node.js is installed by checking these package managers. . Enter the following command in the terminal window:

npm –v

or

yarn –v

If the version number is output, Node.js has been installed. If a non-version number is output, Node.js needs to be installed.

Summary

In this article, we introduced three methods to determine whether Node.js has been installed. These methods include checking via the command line, viewing the application, and by checking the package manager. Node.js is an integral part of front-end development, so installing Node.js is one of the tasks that front-end developers must complete. We hope this article was helpful and you can successfully install Node.js and start your web development journey.

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