nodejs and less installation configuration

Node.js is a backend JavaScript runtime environment for building high-performance web applications and services. Less is a CSS preprocessor that extends ordinary CSS syntax to make it more flexible and maintainable. This article will explain how to install and configure Node.js and Less locally.

1. Node.js installation and configuration

1. Download from the official website

First, we need to download it from the Node.js official website https://nodejs.org/en/ Download the Node.js installation package suitable for your operating system.

2. Install Node.js

After downloading, open the installation package and follow the prompts to install Node.js. After completion, open the command line tool and enter the node -v command. If Node.js appears. js version number, indicating that Node.js is successfully installed.

3. Install npm

npm (Node Package Manager, Node.js package manager) is a command line tool for installing and managing Node.js modules. npm is already included in the Node.js installation package, we just need to verify whether it is installed. Enter the npm -v command in the command line tool. If the version number appears, npm has been successfully installed.

4. Install nrm

nrm is a tool for managing npm sources. It can easily switch between different npm sources. Installing nrm can make your npm downloads faster and more stable. Enter the npm install -g nrm command in the command line tool. After the installation is complete, use the nrm ls command to view the available npm sources.

5. Switch npm source

In most cases, the domestic npm source download speed is slow. Therefore, we can use nrm to switch to the faster npm source. Enter the nrm use cnpm command in the command line tool to switch to cnpm, the domestic source of npm.

2. Less installation configuration

1. Install Less

Installing Less is very simple. You only need to enter the npm install -g less command in the command line tool to install it. Less. After the installation is complete, you can use the lessc command to compile the Less file into a CSS file.

2. Compile Less files

Use the lessc command to compile Less files into CSS files. For example, to compile the less/main.less file into a css/main.css file, you can enter the lessc less/main.less css/main.css command in the command line tool.

3. Monitor Less file changes

If you are developing a large web application and need to constantly modify and update the Less file, you can use the less-watch command to monitor Less File changes. Enter the less-watch less/css/ command in the command line tool to monitor changes to Less files and automatically compile them into CSS files.

Summary

This article introduces how to install and configure Node.js and Less locally, including installing Node.js and npm, using nrm to switch npm sources, installing Less, compiling Less files, and monitoring Less file changes. Node.js and Less are indispensable tools in modern web development. They can help us develop efficient, modern and maintainable web applications.

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