Install nodejs in the project

Node.js is a JavaScript running environment built on the Chrome V8 engine. It allows JavaScript to run on the server side and has efficient I/O operations, event-driven and asynchronous processing capabilities. In modern web development, Node.js has become one of the essential technologies. It is also very important to install Node.js in the project. This article will introduce how to install Node.js in the project and configure the environment.

1. Install Node.js

1. Download Node.js

First we need to go to the official website to download the Node.js installation package, the address is: https://nodejs.org/en/. Choose to download the corresponding version according to your operating system.

2. Install Node.js

Windows platform:

After downloading, double-click the installation package and follow the next step to complete the installation.

Linux platform:

Use the apt-get command to install, enter the command:

sudo apt-get install nodejs

Mac platform:

Use the brew command to install, enter the command:

brew install node

After the installation is complete, you can use the command line tool to check whether Node.js is installed successfully. Enter the following command on the command line:

node -v

If the version number is output, it means that Node.js has been installed successfully.

2. Configure the environment

After installing Node.js, you need to configure environment variables to ensure that Node.js and npm (Node.js package manager) can be used anywhere.

1. Windows platform configuration environment variables

Open system properties-> Advanced options-> Environment variables-> Find Path in system variables and add Node.js The bin folder path in the installation directory, such as C:Program Files
odejs
ode_modules
pm in.

2. Linux and Mac platform configuration environment variables

Open the terminal and enter the following command:

echo 'export PATH=$PATH:/usr/local/bin' >> ~/.bash_profile

Note: If you do not use bash, please change bash_profile Replace with the file relevant to your system. If no changes are made, it defaults to bash.

3. Check the installation results

To check whether Node.js is configured correctly, you can use the command line tool to enter the following command:

node -v

If the version number is output, it means Node.js has been installed successfully. In the same way, we can check whether npm is configured correctly:

npm -v

4. Build a local server

After installing Node.js and configuring environment variables, we can build it through Node.js A local server to run our web application or website.

1. Determine the folder path where the application is located

Use the cd command in the command line tool to enter the root directory where the application is located.

2. Create a server

Enter the following command in the command line tool:

node server.js

Among them, server.js is the file of the server we need to create name. In a real application we would need to replace it with the name of the application.

3. Visit the website

After this, our website will be running on localhost port 3000. Enter http://localhost:3000 in the address bar of your web browser to access our website.

Summary:

This article introduces you to the method of installing Node.js in the project and makes the relevant environment configuration. In addition, we also learned how to set up a local server using Node.js. I hope it will be helpful to everyone when developing actual projects.

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