nodejs installation and environment configuration linux

Node.js is a very popular server-side JavaScript running environment that runs on the V8 JavaScript engine, which is the JavaScript engine in the Google Chrome browser. It enables the JavaScript language to have I/O operation capabilities, and can develop high-performance and scalable network applications through JavaScript programming on the server side. Node.js can run on multiple operating system platforms, including Windows, macOS, and Linux. In this article, we will cover the steps to install and configure Node.js in a Linux system.

1. Install Node.js

Before installing Node.js, make sure your Linux operating system is in the latest state. You can check and update it with the following command:

sudo apt get update
sudo apt get upgrade

Launch the terminal command line and enter the following command to download and set up the source code of Node.js:

curl -sL https://deb.nodesource.com/setup_14.x -o nodesource_setup.sh

Run the following command to ensure there are no errors in the script:

nano nodesource_setup.sh

Press Ctrl w Search for "exit" and delete the "exit 1" line.

Run the script:

sudo bash nodesource_setup.sh

After that, you can run the following command to install Node.js:

sudo apt-get install nodejs

2. Confirm Node.js installation

When Node.js is installed, you can enter the following command line to verify:

node -v

If Node.js is successfully installed, it will return the installation version number:

v14.16.0

3. Install NPM

NPM is the package manager for Node.js, which provides convenient one-click commands to call required modules and libraries. To install NPM, please run the following command:

sudo apt-get install npm

After the installation is complete, please enter the following command line to confirm whether NPM has been installed successfully:

npm -v

The following version will be returned:

6.14.11

4. Upgrade NPM

As time goes by, NPM is updated more frequently. You can run the following command to complete the NPM upgrade:

sudo npm install npm -g

Enter the following command to Confirm whether NPM has been upgraded successfully:

npm -v

will return the following version:

7.9.0

5. Install nodemon

nodemon is a very useful Node.js module and command line tools that can help automatically restart your applications from file changes, keeping your applications active until you stop them yourself.

You can install nodemon through the following command:

sudo npm install -g nodemon

After completing the installation, you can try nodemon:

nodemon -v

The following version will be returned:

2.0.7

6. Development environment configuration

When using Node.js, we need to ensure that the environment can work properly, the most important of which is the debugging function, so that we can dynamically debug and modify the code. Here are the steps to configure your Node.js development environment:

Install the ESLint plug-in in VSCode to make it easier to follow best practices when editing code and maintain coding style.

Set automatic formatting in VSCode settings and install prettier to format the code. Make sure your code always follows a consistent style so readers can more easily read and understand your code.

Create an .eslintrc.json file in the project root directory. You can use whatever rules you like, but I recommend the following setup:

{
    "env": {
        "es6": true,
        "node": true
    },
    "extends": [
        "eslint:recommended"
    ],
    "plugins": ["prettier"],
    "rules": {
        "prettier/prettier": "error"
    }
}

This will install the ESLint code specification library and the prettier code formatting library. You can also use other request-related rulesets in the ESLint plugin.

In the VSCode settings, add the following code:

"eslint.alwaysShowStatus": true,
"eslint.enable": true,
"eslint.options": {
    "extensions": ["js", "jsx", "ts", "tsx"]
},
"[javascript]": {
    "editor.formatOnSave": true
},

This configuration will ensure that ESLint displays its status and enables ESLint support, uses ESLint support and Prettier for syntax checking, and when saving Format code.

Finally, add the following code to the package.json file in your project:

"scripts": {
    "serve": "nodemon app.js"
},

This will start nodemon, which is used to detect changes to files in the application and when the files are placed Restart the application.

7. Summary

Installing and configuring Node.js in a Linux environment may require some work, but with the above steps correctly followed, Node can be installed easily. js, and configure a complete development environment. If you need to quickly make high-performance, scalable web applications, Node.js may be the ideal choice for you.

The above is the detailed content of nodejs installation and environment configuration linux. For more information, please follow other related articles on the PHP Chinese website!