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‎Cute-Summary/article/6 Interesting JavaScript Questions You Should Know.md‎

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@@ -124,7 +124,7 @@ of course, if you want to return an `{}` object, you can just put `{}` it inside
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```javascript
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let f2 = () => ({});
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f2(); // -> undefined
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f2(); // -> {}
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```
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### 4. Can the function be executed using backquotes?

‎Cute-Vue/Blog/3 Useful Node.js Version Managers.md‎

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Article review: <[How to select the Node.js Version](https://medium.com/@Chris1993/how-to-select-the-node-js-version-3a6ae31be18c)>
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When our local development environment needs to install Node.js 8.0.0 and Node.js 17.0.0 at the same time, how to do it?
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Next, I will share 3 tools for managing the Node.js version of the local environment.
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## 1. nvm
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⭐ *Github stars: 60K+*
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[nvm](https://github.com/nvm-sh/nvm) allows you to quickly install and use different versions of node via the command line.
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![](https://images.pingan8787.com/images/20220807/image1.png)
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(Image from: [github](https://github.com/nvm-sh/nvm#additional-notes))
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nvm can only be used in projects for macOS and Linux users. If you are Windows users, you can use [nvm-windows](https://github.com/coreybutler/nvm-windows), [nodist](https://github. com/marcelklehr/nodist) or [nvs](https://github.com/jasongin/nvs).
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### Installation
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macOS download method:
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```bash
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# Method 1 Browser open the following link to download
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https://github.com/nvm-sh/nvm/blob/v0.39.1/install.sh
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# After the download is complete, install it through the command
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sh install.sh
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# Method 2 ✅
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curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
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# Method 3
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wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
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````
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If you encounter problems during the installation process, you can check the [nvm supplementary notes](https://github.com/nvm-sh/nvm#additional-notes).
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### Common commands
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```bash
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nvm ls # view version install all versions
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nvm ls-remote # View all remote Node.js versions
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nvm install 17.0.0 # Install the specified Node.js version
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nvm use 17.0.0 # use the specified Node.js version
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nvm alias default 17.0.0 # Set the default Node.js version
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nvm alias dev 17.0.0 # Set the alias of the specified version, for example, set the alias of version 17.0.0 to dev
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````
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**Example**:
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```bash
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$ nvm use 16
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Now using node v16.9.1 (npm v7.21.1)
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$ node -v
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v16.9.1
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$ nvm use 14
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Now using node v14.18.0 (npm v6.14.15)
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$ node -v
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v14.18.0
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$ nvm install 12
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Now using node v12.22.6 (npm v6.14.5)
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$ node -v
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v12.22.6
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````
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Simple as that!
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## 2. n
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⭐ *Github stars: 16.7K+*
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[n](https://github.com/tj/n) is an interactive Node.js version manager: no subshells, no profile setup, no convoluted API, just simple.
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![](https://images.pingan8787.com/images/20220807/image3.gif)
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`n` is supported on macOS, Linux, including with Windows Subsystem for Linux, and various other unix-like systems. It is written as a BASH script but does not require you to use BASH as your command shell.
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### Installation
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If you already have Node.js installed, an easy way to install `n` is using npm:
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```bash
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npm install n -g
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````
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[Third Party Installers](https://github.com/tj/n#third-party-installers)
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### Common commands
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```bash
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n # show all downloaded versions
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n 10.16.0 # Download the specified version
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n lts # View all LTS Node.js versions remotely
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n run 10.16.0 # run the specified Node.js version
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````
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Use the `n -h` command to read help information, there are these main commands:
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```bash
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n Display downloaded Node.js versions and install selection
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n latest Install the latest Node.js release (downloading if necessary)
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n lts Install the latest LTS Node.js release (downloading if necessary)
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n <version> Install Node.js <version> (downloading if necessary)
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n install <version> Install Node.js <version> (downloading if necessary)
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n run <version> [args ...] Execute downloaded Node.js <version> with [args ...]
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n which <version> Output path for downloaded node <version>
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n exec <vers> <cmd> [args...] Execute command with modified PATH, so downloaded node <version> and npm first
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n rm <version ...> Remove the given downloaded version(s)
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n prune Remove all downloaded versions except the installed version
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n --latest Output the latest Node.js version available
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n --lts Output the latest LTS Node.js version available
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n ls Output downloaded versions
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n ls-remote [version] Output matching versions available for download
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n uninstall Remove the installed Node.js
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````
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## 3. fnm
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⭐ *Github stars: 8.4K+*
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[fnm](https://github.com/Schniz/fnm): 🚀 Fast and simple Node.js version manager, built in Rust
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![](https://images.pingan8787.com/images/20220807/image4.png)
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(Image from: [freecodecamp](https://www.freecodecamp.org/news/fnm-fast-node-manager/))
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**Features include**:
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🌎 Cross-platform support (macOS, Windows, Linux)
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✨ Single file, easy installation, instant startup
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🚀 Built with speed in mind
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📂 Works with .node-version and .nvmrc files
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### Installation
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macOS / Linux environment:
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```bash
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# bash, zsh and fish shells
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curl -fsSL https://fnm.vercel.app/install | bash
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````
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Windows environment:
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```bash
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# Open the terminal in administrator mode. After installation, it can only be opened in administrator mode.
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choco install fnm
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# After the installation is complete, you need to manually set the environment variables
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````
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Linux/macOS/Windows environments can also directly download binary files for installation, download address: [https://github.com/Schniz/fnm/releases](https://github.com/Schniz/fnm/releases)
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### Common commands
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```bash
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fnm -h # View help
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fnm install 17.0.0 # Install the specified Node.js version
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fnm use 17.0.0 # use the specified Node.js version
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fnm default 17.0.0 # Set the default Node.js version
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````
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If you have a better tool, please leave a message to share.
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If this article helps you, please like and support it.👍
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✨follow me： https://dev.to/chris1993

‎Cute-Vue/Blog/3 款非常实用的 Node.js 版本管理工具.md‎

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在上一篇文章《[3 分钟掌握 Node.js 版本的区别](https://juejin.cn/post/7126183800874205220)》中介绍了 Node.js 版本分为 LTS 和 Current 系列，当我们需要在本地开发环境同时安装 LTS 版本和 Current 版本时，就需要对 Node.js 版本进行版本管理。
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比如本地需要同时安装 Node.js 8.0.0 和 Node.js 17.0.0。
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为了能够对 Node.js 版本进行版本管理，我整理了 3 款非常实用的 Node.js 版本管理工具，让大家能够自由的切换本地环境不同的 Node.js 版本。
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## 1. nvm
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⭐ *Github stars: 60K+*
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[nvm](https://github.com/nvm-sh/nvm) 是一款 Node.js 版本管理工具，允许用户通过命令行快速安装、切换和管理不同的 Node.js 版本。
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![](https://images.pingan8787.com/images/20220807/image1.png)
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（图片来自：[github](https://github.com/nvm-sh/nvm#additional-notes)）
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nvm 只适用于 macOS 和 Linux 用户的项目，如果是 Windows 用户，可以使用 [nvm-windows](https://github.com/coreybutler/nvm-windows) 、[nodist](https://github.com/marcelklehr/nodist) 或 [nvs](https://github.com/jasongin/nvs) 替换。
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### 安装方式
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macOS 下载方式：
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```bash
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# 方式1 浏览器打开下面链接下载
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https://github.com/nvm-sh/nvm/blob/v0.39.1/install.sh
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# 下载完成后，通过命令安装
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sh install.sh
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# 方式2 推荐
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curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
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# 方式3
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wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
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```
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安装过程中如果遇到一些奇怪的问题，可以查看下 [nvm 补充说明](https://github.com/nvm-sh/nvm#additional-notes)。
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### 常用命令
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```bash
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nvm ls # 查看版本安装所有版本
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nvm ls-remote # 查看远程所有的 Node.js 版本
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nvm install 17.0.0 # 安装指定的 Node.js 版本
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nvm use 17.0.0 # 使用指定的 Node.js 版本
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nvm alias default 17.0.0 # 设置默认 Node.js 版本
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nvm alias dev 17.0.0 # 设置指定版本的别名，如将 17.0.0 版本别名设置为 dev
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```
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![](https://images.pingan8787.com/images/20220807/image2.png)
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## 2. n
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⭐ *Github stars: 16.7K+*
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[n](https://github.com/tj/n) 是一款交互式的 Node.js 版本管理工具，没有子脚本，没有配置文件，也没有复杂的 API，使用起来非常简单。
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![](https://images.pingan8787.com/images/20220807/image3.gif)
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n 只适用于 macOS 和 Linux ，不适用于 Windows。
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### 安装方式
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可以使用 npm 直接安装到全局：
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```bash
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npm install n -g
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```
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### 常用命令
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```bash
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n # 显示所有已下载版本
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n 10.16.0 # 下载指定版本
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n lts # 查看远程所有 LTS Node.js 版本
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n run 10.16.0 # 运行指定的 Node.js 版本
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```
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输入 `n -h`查看帮助信息，主要命令如下：
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```bash
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n Display downloaded Node.js versions and install selection
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n latest Install the latest Node.js release (downloading if necessary)
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n lts Install the latest LTS Node.js release (downloading if necessary)
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n <version> Install Node.js <version> (downloading if necessary)
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n install <version> Install Node.js <version> (downloading if necessary)
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n run <version> [args ...] Execute downloaded Node.js <version> with [args ...]
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n which <version> Output path for downloaded node <version>
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n exec <vers> <cmd> [args...] Execute command with modified PATH, so downloaded node <version> and npm first
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n rm <version ...> Remove the given downloaded version(s)
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n prune Remove all downloaded versions except the installed version
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n --latest Output the latest Node.js version available
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n --lts Output the latest LTS Node.js version available
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n ls Output downloaded versions
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n ls-remote [version] Output matching versions available for download
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n uninstall Remove the installed Node.js
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```
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## 3. fnm
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⭐ *Github stars: 8.4K+*
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[fnm ](https://github.com/Schniz/fnm)是一款快速简单 🚀 的 Node.js 版本管理器，使用 Rust 构建。
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![](https://images.pingan8787.com/images/20220807/image4.png)
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（图片来自：[freecodecamp](https://www.freecodecamp.org/news/fnm-fast-node-manager/)）
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主要特点包括：
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- 🌎 跨平台支持，包括：macOS、Windows、Linux；
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- ✨ 单一文件，轻松安装，即时启动 ；
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- 🚀 以速度为设计理念；
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- 📂 适用于 `.node-version` 和 `.nvmrc` 文件；
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### 安装方式
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macOS / Linux 环境：
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```bash
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# bash, zsh and fish shells
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curl -fsSL https://fnm.vercel.app/install | bash
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```
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Windows 环境：
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```bash
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# 管理员模式打开终端，安装后只能使用管理员模式打开使用
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choco install fnm
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# 安装完成还需要手动设置环境变量
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```
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Linux/macOS/Windows 环境也可以直接下载二进制文件安装，下载地址：[https://github.com/Schniz/fnm/releases](https://github.com/Schniz/fnm/releases)
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### 常用命令
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```bash
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fnm -h # 查看帮助
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fnm install 17.0.0 # 安装指定 Node.js 版本
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fnm use 17.0.0 # 使用指定 Node.js 版本
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fnm default 17.0.0 # 设置默认 Node.js 版本
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```
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## 总结
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本文为大家推荐了 3 款非常常用的 Node.js 版本管理工具，大家可以按照自己实际需求选择使用。
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如果大家有更好的工具，欢迎留言分享。
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如果本文给您带来帮助，还请点赞支持一下啦。
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欢迎关注微信公众号“前端自习课”。

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