window平台nvm版本管理工具的演示安装以及用它安装nodejs的安装等等

简书链接:window平台nvm版本管理工具的演示安装以及用它安装nodejs的安装等等
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nvm: nodejs version manager
npm:nodejs package manager

所有版本下载

1	https://github.com/coreybutler/nvm-windows/releases

测试:

输入

root```查看安装路径，输入```nvm version```查看nvm版本

```
C:\Users\Administrator.DESKTOP-Q7DQAHS>nvm root

Current Root: F:\react-native\bin\nvm-noinstall\nvm-setup\nvm

C:\Users\Administrator.DESKTOP-Q7DQAHS>nvm version
1.1.6

可以验证正是我之前填写的安装路径版本也是正常的。

代理下载加速

在安装目录下的 settings.txt文件中添加如下内容

1 2	node_mirror: http://npm.taobao.org/mirrors/node/ npm_mirror: https://npm.taobao.org/mirrors/npm/

下载node.js最新版
首先看看https://nodejs.org/en/ 最新版本是多少

`
截止2018-4-8 20:26:03 目前最新版nodejs是**9.11.1**
输入nvm install 9.11.1

C:\Users\Administrator.DESKTOP-Q7DQAHS>nvm install 9.11.1
Downloading node.js version 9.11.1 (64-bit)...
Complete
Creating F:\react-native\bin\nvm-noinstall\nvm-setup\nvm\temp

Downloading npm version 5.6.0... Complete
Installing npm v5.6.0...

Installation complete. If you want to use this version, type

nvm use 9.11.1

有木有发现自动给我下载了一个npm 5.6.0

什么是npm

npm 是 JavaScript 世界的包管理工具,并且是 Node.js 平台的默认包管理工
https://www.npmjs.com.cn/

检查安装

之前没有安装node.js是这样的

1
2
3

C:\Users\Administrator.DESKTOP-Q7DQAHS>nvm list

No installations recognized.

安装之后是这样的

1
2
3

C:\Users\Administrator.DESKTOP-Q7DQAHS>nvm list

    9.11.1

检查node.js环境变量

C:\Users\Administrator.DESKTOP-Q7DQAHS>node --version
v9.7.1

可以看出来一切ok.
检查npm包管理器工具是否正常

[email protected] D:\Program Files\nodejs\node_modules\npm

C:\Users\Administrator.DESKTOP-Q7DQAHS>npm help

Usage: npm <command>

where <command> is one of:
    access, adduser, bin, bugs, c, cache, completion, config,
    ddp, dedupe, deprecate, dist-tag, docs, doctor, edit,
    explore, get, help, help-search, i, init, install,
    install-test, it, link, list, ln, login, logout, ls,
    outdated, owner, pack, ping, prefix, profile, prune,
    publish, rb, rebuild, repo, restart, root, run, run-script,
    s, se, search, set, shrinkwrap, star, stars, start, stop, t,
    team, test, token, tst, un, uninstall, unpublish, unstar,
    up, update, v, version, view, whoami

npm <command> -h     quick help on <command>
npm -l           display full usage info
npm help <term>  search for help on <term>
npm help npm     involved overview

Specify configs in the ini-formatted file:
    C:\Users\Administrator.DESKTOP-Q7DQAHS\.npmrc
or on the command line via: npm <command> --key value
Config info can be viewed via: npm help config

[email protected] D:\Program Files\nodejs\node_modules\npm

C:\Users\Administrator.DESKTOP-Q7DQAHS>npm --version
5.6.0

可以看出来安装目录也提示出来了D:\Program Files\nodejs\node_modules\npm。很ok,是我要的结果，给我安装到d盘了。

直接安装最新版

1	npm install latest

下面的意思


F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>nvm install last
last.0.0
Node.js vlast.0.0 is only available in 32-bit.

F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>nvm install latest
Version 9.11.1 is already installed.

F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>nvm install 9.11.0
Downloading node.js version 9.11.0 (64-bit)...
Complete
Creating F:\react-native\bin\nvm-noinstall\nvm-setup\nvm\temp

Downloading npm version 5.6.0...

第一句表示我输错了，第二句表示我这最新版已经下载了，第三句是下载9.11.0
版本

F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>nvm install 9.11.0
Downloading node.js version 9.11.0 (64-bit)...
Complete
Creating F:\react-native\bin\nvm-noinstall\nvm-setup\nvm\temp

Downloading npm version 5.6.0... Error while downloading https://npm.taobao.org/mirrors/npm/v5.6.0.zip - Get http://172.168.18.18:8084/SXC_B_3512495485_16512182594317269750/cdn.npm.taobao.org/dist/npm/v5.6.0.zip: EOF
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x20 pc=0x5b32f7]

goroutine 1 [running]:
_/C_/Users/Corey/Documents/workspace/OSS/nvm-windows/src/nvm/web.Download(0x10f6a0c0, 0x2d, 0x10eda320, 0x43, 0x10f238d0, 0x5, 0x0)
        C:/Users/Corey/Documents/workspace/OSS/nvm-windows/src/nvm/web/web.go:67 +0x307
_/C_/Users/Corey/Documents/workspace/OSS/nvm-windows/src/nvm/web.GetNpm(0x10edc481, 0x2f, 0x10f238d0, 0x5, 0x48)
        C:/Users/Corey/Documents/workspace/OSS/nvm-windows/src/nvm/web/web.go:163 +0x21b
main.install(0x10eca0d0, 0x6, 0x642b6f, 0x2)
        C:/Users/Corey/Documents/workspace/OSS/nvm-windows/src/nvm.go:260 +0x680
main.main()
        C:/Users/Corey/Documents/workspace/OSS/nvm-windows/src/nvm.go:76 +0xa78

F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>nvm list

    9.11.1
    9.11.0

F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>****

成功下载另外一个版本9.11.0而且是从淘宝下载的https://npm.taobao.org/mirrors/npm/v5.6.0.zip 可以看出来

切换node.js版本

1
2
3

F:\react-native\bin\nvm-noinstall\nvm-setup\nvm>nvm use 9.11.1
Now using node v9.11.1 (64-bit)

切换修改需要重新打开命令行.这个简单的道理大家都应该懂吧.

问题解决

如果执行node提示不是可执行文件，或者通过执行npm提示这个node命令有问题，那就需要通过where npm找到node**exe 把64这个字删掉，

不过通过输入nvm use [version] [arch] 的语法来看，切换办法的时候要写一下架构才行，不过我现在是暴力修改了。
···nvm install [arch] : The version can be a node.js version or “latest” for the latest stable version.
Optionally specify whether to install the 32 or 64 bit version (defaults to system arch).···

为什么要用这个？

双击
官网的node.js下载下来之后自动可以使用npm了，但是会出现很多问题，目前我出现的问题是一个普通的 npm install -g hexo-cli都报错了，说语法有问题》