nodejs and express installation directory

Node.js and Express are very popular tools in modern web development. Node.js is a JavaScript runtime based on the Chrome V8 engine for writing backend applications, while Express is a web application framework for Node.js.

When developing applications using Node.js and Express, you need to install them on your computer first. In this article, we will explain how to obtain and install Node.js and Express, and introduce their default installation directories.

Get and install Node.js

Before you start using Node.js, you need to get and install Node.js from the official website.

1. Open the Node.js official website: https://nodejs.org/
2. Click the "Download" button to get the installer suitable for your operating system.
3. After the download is complete, run the installer.
4. In the installation wizard, select "Default Settings" for quick installation, or make customized settings.
5. The installer will automatically install Node.js to the default location on your computer. For Windows systems, the default location is "C:Program Files
   odejs"; for Mac and Linux systems, the default location is "/usr/local/".

Check if Node.js has been installed successfully

Once the installation is complete, you can check if Node.js has been installed using the following command:

In the command line Enter the following command and press Enter:

node -v

If you see the output of the Node.js version, it means that Node.js has been successfully installed.

Getting and Installing Express

After installing Node.js, you can use npm (the Node.js package manager) to get and install Express.

1. Open the command line terminal.
2. Enter the following command on the command line and press Enter:

npm install express

3. npm will automatically download and install Express and all its dependencies.
4. Once the installation is complete, you can check if Express is installed using the following command:

npm list express

5. If you see express in the list as an installed package, It means that Express has been successfully installed.

Express's default installation directory

Once you have successfully installed Express, its default installation directory will be your application directory.

You can view your current working directory by using the following command:

Enter the following command at the command line and press Enter:

pwd

In Windows systems, This command will display the current folder path. On Mac and Linux systems, this command will display the current working directory path.

Once you have found your application directory, you can create your Express application in that directory using the following command:

express <应用程序名称>

For example, if you want to create an application called "myapp" Express application, you should enter the following command in the command line:

express myapp

This command will create an Express application named "myapp" in the current directory and place its folder in that directory middle. If you want to customize the installation directory, you can use the "-d" flag.

Summary

This article introduces how to download and install Node.js and Express, and introduces their default installation directories. Installing Node.js and Express is crucial for developing web applications as they provide some convenient features and tools that make the development process faster and more efficient.

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