How to start a project based on Node.js

Node.js is a JavaScript runtime environment based on the Chrome V8 engine. It utilizes an event-driven, non-blocking I/O model, making it a lightweight and efficient web server framework. Here we will mainly introduce how to start a project based on Node.js.

Starting a project based on Node.js requires the following main steps:

Step 1: Install Node.js

To use Node.js, you first need to Install Node.js. It is recommended to use the official installation source of Node.js for installation. You can get the latest stable version at the official Node.js download page.

After the installation is complete, you can use the following command in the terminal to check whether Node.js is successfully installed:

node -v

This command will display the version number of the installed Node.js, indicating Node. js is installed successfully.

Step 2: Install project dependencies

Project dependencies refer to the external libraries and plug-ins required by the project. Before installing project dependencies, you need to open the directory where your project is located in the terminal (cd command), and then use the following command to install the dependencies:

npm install

This command will find package.json in the project file, reads the dependencies in it, and installs them all into the local project's node_modules folder. This helps projects maintain consistency in development and deployment.

Step 3: Start the project

After the project's dependencies have been installed, you can use the following command to start the project:

npm start

This command will be in the terminal Start your Node.js project and listen for HTTP requests on the default port of localhost (usually 3000). After successful startup, you will see some information about your project in the terminal. If all went well, your project will now be accessible in your browser at http:localhost:3000.

Step 4: Reload the project

When you modify the code in the project, you need to restart the project for it to take effect. This is obviously troublesome, so we can use the nodemon tool, which will monitor file changes for your Node.js project and automatically restart your project.

First, you need to install nodemon globally:

npm install nodemon -g

After the installation is complete, you can use the following command to start your project:

nodemon app.js

This This means that after you save the modified file, your project will automatically restart, which will undoubtedly make your development process smoother.

After successfully starting nodemon, you will see some information about your project in the terminal. If all went well, your project will now be accessible in your browser at http:localhost:3000.

Summary:

In this article, we introduced the step-by-step method of starting a project based on Node.js, and introduced how to avoid repeatedly starting the service when the project code is updated. Whether you are a beginner or an experienced developer, these steps are crucial, so be sure to read them carefully and follow them.

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