Install nodejs

Install nodejs: the necessary environment for front-end development in the new era

With the continuous development and innovation of Web front-end technology, the scope of work of front-end engineers is becoming more and more extensive. As the basic environment for front-end development, the importance of Node.js is increasingly widely recognized. This article will introduce how to install Node.js, and briefly introduce its importance and usage scenarios.

1. Introduction to Node.js

Node.js is a JavaScript running environment based on the Chrome V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model, making it lightweight and efficient. npm, the Node.js package manager, is the world's largest ecosystem of open source libraries.

Node.js was originally an open source project created by Ryan Dahl in 2009. Node.js provides a rich set of JavaScript libraries and modules that allow developers to use JavaScript outside the browser for server-side programming, such as database operations, file system operations, etc. Therefore, Node.js is not only suitable for web development, but can also be used to develop command line tools, desktop applications, the Internet of Things, and more.

2. Install Node.js

The installation of Node.js is very simple. The following will introduce the installation methods under three different platforms.

1. Windows platform

a) Download the installation package

Download the Windows installer of Node.js from the official website. The download page is https://nodejs.org/zh-cn/download/. Download the corresponding version of the Windows installation package according to your system version.

b) Install Node.js

After downloading, double-click to open the installation program. During the installation process, check the "Add Node.js to system path" option and follow the wizard prompts to complete the installation.

c) Verify the installation

After the installation is completed, enter the "node -v" command in the command line window to check the version number of Node.js and verify whether the installation is successful.

2. Mac OS Platform

a) Install Homebrew

Homebrew is a management tool for installing Unix-like tool packages on Mac OS. In the command line interface, execute the following command:

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

b) Install Node.js

Enter the following command in the command line:

brew update
brew install node

c) Verify the installation

Execute the "node -v" command to check the version number of Node.js and verify whether the installation is successful.

3. Linux platform

a) Download the installation package

Download the Linux installation program of Node.js from the official website. The download page is https://nodejs.org/zh-cn/download/. Download the corresponding version of the Linux installation package according to your system version.

b) Install Node.js

After the download is completed, open the terminal and enter the following command:

tar -xzf node-*.tar.gz
cd node-*
./configure
make
sudo make install

c) Verify the installation

Execute "node - v" command to check the version number of Node.js and verify whether the installation is successful.

3. Usage Scenarios

Node.js can be used in many scenarios, here are a few:

1. Web back-end development

For a Web backend developer, Node.js provides a simple, fast, and efficient development method, making the backend development process smoother, more interesting, and more convenient. The HTTP module of Node.js allows us to easily create web servers. At the same time, Node.js supports various databases and frameworks, such as Express, Koa, SailsJS, etc., making development more efficient.

2. Command line tool development

The running environment of Node.js can help developers build command line tools. For example, NPM is a command line tool developed using Node.js. It is currently the main way to manage Node.js packages. In addition, Node.js can also be used for packaging, management, and deployment of projects, improving development efficiency.

3. Internet of Things

Now more and more intelligent hardware devices appear, and Node.js has the characteristics of non-blocking I/O and event-driven, which can help the hardware Programmers in the world solve many complex tasks. In terms of IoT, Node.js can be used to build servers, IoT gateways and other functions.

4. Summary

Node.js is simple to install, and various libraries and frameworks can be easily installed and managed through the official package manager npm. In the work of front-end engineers, Node.js has become an essential environment for daily development. Whether it is web backend development, command line tool development or the Internet of Things, Node.js has important application scenarios. Therefore, it is crucial for front-end developers to master the use and installation of Node.js.

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