Let's talk about several methods to detect Node.js installation

Node.js is a JavaScript running environment based on the Chrome V8 engine, which enables JavaScript to run on the server side. It provides a lightweight, efficient, and open platform that can run JavaScript code on different operating systems (such as Windows, Linux, Mac OS, etc.). During the development process, we need to detect whether Node.js has been installed correctly.

This article will introduce the following methods to detect Node.js installation.

1. Use command line detection

Enter the following command on the command line:

node -v

If the installation is successful, the version number of Node.js will be displayed .

If it prompts "command not found", it means Node.js has not been installed.

2. View the system path

You can check whether Node.js has been correctly installed and configured with the system path by viewing the system's environment variables.

Enter the following command on the command line:

echo $PATH

If the installation is successful, you can see the installation path of Node.js in the system path.

If you cannot see the path to Node.js, Node.js is not installed correctly.

3. Run Node.js script

You can check whether Node.js has been correctly installed and configured with the system path by running a simple Node.js script.

Create a file named "hello.js" and enter the following code:

console.log("Hello, world!");

Then run it in the command line:

node hello.js

If "Hello, world!", it means that Node.js has been installed correctly.

If none of the above methods can detect the installation of Node.js, it is recommended to reinstall Node.js.

Summary

This article introduces several methods to detect the installation of Node.js. The most commonly used method is to enter the "node -v" command on the command line to view the version number of Node.js. Detecting the installation of Node.js is a critical step in developing Node.js applications. I hope this article will be helpful to you.

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