How to create a nodejs project

Node.js is a commonly used JavaScript runtime environment that can be used to develop high-performance, scalable web applications. Before starting a Node.js project, you need to know some basic knowledge, including the installation and use of Node.js, and the choice of code editor. Next, we will introduce step by step how to create a Node.js project.

1. Install Node.js

First, you need to install Node.js. You can download the installation package suitable for your operating system from the Node.js official website (https://nodejs.org/zh-cn/) and follow the prompts to install it. After the installation is successful, you can open a terminal and enter node -v to check the version information of Node.js to ensure that the installation is successful.

2. Choose a code editor

Node.js projects require a code editor to create, edit, and manage project files. Currently, the more popular code editors include Visual Studio Code, Sublime Text, Atom, etc. You can choose based on your personal habits and needs.

3. Create project folders and files

Choose a location on your computer and create a new project folder. In this folder, you need to create some necessary files, including:

• package.json: This is a file used to describe project properties and dependencies, which contains the project name, version , author and other information;
• app.js: This is the main file of the project, including the entry point of the server and routing control, etc.;
• public folder: used to store static files, including Style sheets, JavaScript files and images, etc.;
• views folder: used to store the view files of the project, including HTML pages and templates, etc.

You can create these files and folders using the following command in the terminal:

mkdir your_project_name
cd your_project_name
touch package.json app.js
mkdir public views

4. Initialize the project

In the project folder , you need to use npm (the package manager for Node.js) to initialize the project. Use the following command in the terminal:

npm init

Enter the project name, version, author, entry file and other information according to the prompts. Once completed, you will see a file called package.json in your project folder.

5. Installing dependency packages

During the project development process, it is generally necessary to use many third-party libraries and frameworks. In Node.js, you can use the npm install command to install these dependency packages. For example, if you want to install the Express framework to support web application development, you can use the following command in the terminal:

npm install express --save

Among them, the --save parameter means to save the installed dependent library information to the package.json file middle.

6. Write project code

After completing the previous steps, you can start writing the project code. In the app.js file, you need to write relevant code to start functions such as server and routing control. You can follow the following steps to achieve this:

• Import the Express framework and other required modules;
• Create an Express application object;
• Set the server port number;
• Write routing controller and other related codes;
• Start the server so that it starts listening on the specified port.

According to your own needs, you can also add other functional modules, such as database connection, form validation, etc.

7. Run the project

Finally, when you have finished writing the code, you can run the Node.js project using the following command in the terminal:

node app.js

At this point, you can access your application through localhost:port in the browser.

Summary

The above are the main steps to create a Node.js project. In the practice process, you also need to have a certain understanding and practical experience of Node.js related knowledge. If you have just started learning Node.js, please don't be discouraged. Try more and practice more. I believe you will soon be able to master the development of Node.js projects.

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