Node.js的版本管理工具，可以实现多个node版本共存，并随意切换，就相当于python里面的pyenv
项目地址：https://github.com/nvm-sh/nvm/blob/master/README.md
一 安装1.1 Mac 安装 nvm
https://github.com/nvm-sh/nvm/blob/master/README.md
1.2 Windows 安装 nvm
nvm-windows
nodist
首先我们看下帮助文档，其实这个文档说的很明白了
nvm help
Node Version Manager (v0.39.1)
Note: <version> refers to any version-like string nvm understands. This includes:
- full or partial version numbers, starting with an optional "v" (0.10, v0.1.2, v1)
- default (built-in) aliases: node, stable, unstable, iojs, system
- custom aliases you define with `nvm alias foo`
Any options that produce colorized output should respect the `--no-colors` option.
Usage:
nvm --help Show this message（就是显示这条消息）
--no-colors Suppress colored output（去掉一些颜色，显示的就是黑纸白字）
nvm --version Print out the installed version of nvm（打印nvm版本）
nvm install [<version>] Download and install a <version>. Uses .nvmrc if available and version is omitted.（下载指定的node版本，这个是常用命令）
The following optional arguments, if provided, must appear directly after `nvm install`（这些参数必须紧紧跟在install的后面，比如vnm install -s 8.0.0）:
-s Skip binary download, install from source only.(自己从源码安装)
-b Skip source download, install from binary only.（自己从二进制文件安装）
--reinstall-packages-from=<version> When installing, reinstall packages installed in <node|iojs|node version number>（也就是从安装某个版本）
--lts When installing, only select from LTS (long-term support) versions（只安装长期支持版）
--lts=<LTS name> When installing, only select from versions for a specific LTS line（指定LTS的名字）
--skip-default-packages When installing, skip the default-packages file if it exists（跳过默认的包文件）
--latest-npm After installing, attempt to upgrade to the latest working npm on the given node version（node安装完成后，自动更新到最新版的npm）
--no-progress Disable the progress bar on any downloads（禁用所有的其他下载）
--alias=<name> After installing, set the alias specified to the version specified. (same as: nvm alias <name> <version>)（指定一个别名）
--default After installing, set default alias to the version specified. (same as: nvm alias default <version>)（下载完成后，直接设置成默认版本）
nvm uninstall <version> Uninstall a version（卸载掉某个版本）
nvm uninstall --lts Uninstall using automatic LTS (long-term support) alias `lts/*`, if available.（长期支持版卸载）
nvm uninstall --lts=<LTS name> Uninstall using automatic alias for provided LTS line, if available.（指定长期支持版的名）
nvm use [<version>] Modify PATH to use <version>. Uses .nvmrc if available and version is omitted.（切换版本，这是常用命令）
The following optional arguments, if provided, must appear directly after `nvm use`:
--silent Silences stdout/stderr output
--lts Uses automatic LTS (long-term support) alias `lts/*`, if available.
--lts=<LTS name> Uses automatic alias for provided LTS line, if available.
nvm exec [<version>] [<command>] Run <command> on <version>. Uses .nvmrc if available and version is omitted.（直接用某个版本运行命令）
The following optional arguments, if provided, must appear directly after `nvm exec`:
--silent Silences stdout/stderr output
--lts Uses automatic LTS (long-term support) alias `lts/*`, if available.
--lts=<LTS name> Uses automatic alias for provided LTS line, if available.
nvm run [<version>] [<args>] Run `node` on <version> with <args> as arguments. Uses .nvmrc if available and version is omitted.（直接在某个版本上运行node脚本）
The following optional arguments, if provided, must appear directly after `nvm run`:
--silent Silences stdout/stderr output
--lts Uses automatic LTS (long-term support) alias `lts/*`, if available.
--lts=<LTS name> Uses automatic alias for provided LTS line, if available.
nvm current Display currently activated version of Node（查看当前的node版本）
nvm ls [<version>] List installed versions, matching a given <version> if provided（列出所有的已经安装的版本）
--no-colors Suppress colored output
--no-alias Suppress `nvm alias` output
nvm ls-remote [<version>] List remote versions available for install, matching a given <version> if provided（列出可以被下载的所有的node版本）
--lts When listing, only show LTS (long-term support) versions
--lts=<LTS name> When listing, only show versions for a specific LTS line
--no-colors Suppress colored output
nvm version <version> Resolve the given description to a single local version
nvm version-remote <version> Resolve the given description to a single remote version
--lts When listing, only select from LTS (long-term support) versions
--lts=<LTS name> When listing, only select from versions for a specific LTS line
nvm deactivate Undo effects of `nvm` on current shell(撤销' nvm '对当前shell的影响)
--silent Silences stdout/stderr output(不要打印信息)
nvm alias [<pattern>] Show all aliases beginning with <pattern>(模糊查找)
--no-colors Suppress colored output
nvm alias <name> <version> Set an alias named <name> pointing to <version>(给一个版本设置别名)
nvm unalias <name> Deletes the alias named <name>(删除别名)
nvm install-latest-npm Attempt to upgrade to the latest working `npm` on the current node version（在当前的node版本中，吧npm更新为最新）
nvm reinstall-packages <version> Reinstall global `npm` packages contained in <version> to current version（从新安装某个版本）
nvm unload Unload `nvm` from shell（从shell卸载' nvm '）
nvm which [current | <version>] Display path to installed node version. Uses .nvmrc if available and version is omitted.(显示指定版本的在本机的安装位置)
--silent Silences stdout/stderr output when a version is omitted
nvm cache dir Display path to the cache directory for nvm(显示缓存目录)
nvm cache clear Empty cache directory for nvm（清空缓存目录）
nvm set-colors [<color codes>] Set five text colors using format "yMeBg". Available when supported.
Initial colors are:
g b y r e
Color codes:
r/R = red / bold red
g/G = green / bold green
b/B = blue / bold blue
c/C = cyan / bold cyan
m/M = magenta / bold magenta
y/Y = yellow / bold yellow
k/K = black / bold black
e/W = light grey / white
Example:
nvm install 8.0.0 Install a specific version number
nvm use 8.0 Use the latest available 8.0.x release
nvm run 6.10.3 app.js Run app.js using node 6.10.3
nvm exec 4.8.3 node app.js Run `node app.js` with the PATH pointing to node 4.8.3
nvm alias default 8.1.0 Set default node version on a shell
nvm alias default node Always default to the latest available node version on a shell
nvm install node Install the latest available version
nvm use node Use the latest version
nvm install --lts Install the latest LTS version
nvm use --lts Use the latest LTS version
nvm set-colors cgYmW Set text colors to cyan, green, bold yellow, magenta, and white
Note:
to remove, delete, or uninstall nvm - just remove the `$NVM_DIR` folder (usually `~/.nvm`)
nvm ls 列出已经本地已经安装的版本
nvm ls
nvm ls-remote 列出云端所有能被安装的版本
安装指定版本的node，该命令有多个参数 ，参数应该紧跟在install之后，参数参考上面help翻译
直接vnm install加版本号即可，也可以只写主版本号，只锁定主版本号，次版本取最新
不推荐用-s 这个选项表示是从源码编译
vnm install -s 8.0.0
注意：删除某个版本时，一定要切换到其他版本，否者无法卸载
nvm uninstall 8.0.0
Uninstalled node v8.0.0
nvm current
v8.0.0
通过别名切换
nvm use default
Now using node v16.15.0 (npm v8.5.5)
通过版本切换
nvm use 8
Now using node v8.0.0 (npm v5.0.0)
1 将8.0.0版本命名为usural
nvm alias usural 8.0.0
usural -> 8.0.0 (-> v8.0.0)
2 模糊查找 us
nvm alias us
usural -> 8.0.0 (-> v8.0.0)
3 取消别名
nvm unalias usural
Deleted alias usural - restore it with `nvm alias "usural" "8.0.0"`
执行命令后，node版本为系统原本的版本
nvm deactivate --silent
nvm which current
/Users/anaymous/.nvm/versions/node/v8.0.0/bin/node
显示缓存文件目录
nvm cache dir
/Users/anaymous/.nvm/.cache
清除缓存文件
nvm cache clear
nvm cache cleared.
就是用于更改下图中红红绿绿的那些东西，纯属娱乐的命令，鼓捣玩一玩就行了
gbyre的含义，参考上面的帮助
nvm set-colors gbyre
效果：
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