How to check whether nodejs is installed successfully

Node.js is an open source, cross-platform environment for running JavaScript code on the server side. Its use is becoming more and more widespread, especially in the field of web development. When we need to use Node.js, the first thing to do is to make sure it has been installed successfully. So how to detect whether Node.js has been successfully installed? This article will introduce you to several common detection methods.

1. Command line detection

It is the most common way to detect whether Node.js is successfully installed on the command line. We can use the following command:

node -v

This command can Output the current version number of Node.js. If the version number is output, it means that Node.js has been successfully installed. If there is no output, Node.js may not be installed correctly, or the wrong version is installed.

2. Detection in IDE

If you are using IDE for development, you can use the detection function provided by IDE to detect whether Node.js is installed successfully. Taking VS Code as an example, we can enter the following command in the terminal:

node -v

If the version number is returned, Node.js has been successfully installed. If no instructions are returned, the environment variables may not be set correctly or the wrong version may be installed.

3. Check the installation directory

We can also check whether Node.js has been successfully installed by checking the installation directory of Node.js. Under the Windows operating system, Node.js is installed by default in the following path:

C:Program Files
odejs

On Mac OS, it is installed by default in the following path:

/usr/local/bin/node

On Linux, it is installed by default In the following path:

/usr/bin/nodejs

If you can find the Node.js file in the corresponding directory, it means that Node.js has been successfully installed.

4. Test Node.js

If none of the above methods can determine whether Node.js has been successfully installed, we can use a simple test method to detect it. Enter the following command on the command line:

node -e 'console.log("Hello, World!")'

If "Hello, World!" can be output, Node.js has been successfully installed, otherwise you need to reinstall it.

Summary

The above are several common methods to detect whether Node.js is successfully installed. We can use any of these methods to determine whether Node.js has been successfully installed according to our own situation. If Node.js is not installed, you need to download and install it according to your operating system and needs.

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