## 安装

```bash
# 下载官网
https://nodejs.org/zh-cn/
https://nodejs.org/zh-cn/download/
# 国内(国内的版本一般会滞后，不推荐)
http://nodejs.cn/download/


# Linux安装
xz -d xxx.tar.xz
tar xvf xxx.tar

# 配置
export PATH=/usr/local/node-v16.15.0-linux-x64/bin:$PATH

source .bashrc

# Windows安装
wget https://npm.taobao.org/mirrors/node/v16.11.1/node-v16.11.1-x64.msi


# 源代码编译安装(build-esential)
wget https://nodejs.org/dist/v16.13.0/node-v16.13.0.tar.gz
tar -zxvf node-v16.13.0.tar.gz
./configure
make
sudo make install
```

## 显示版本

```bash
npm -v
```

## 更新npm

```bash
npm install npm@latest -g
```

## 设置阿里源

```
npm get registry 

npm config set registry http://registry.npm.taobao.org/

npm config set registry https://registry.npmjs.org/

# 安装yarn
npm install yarn -g
```

`http://npm.taobao.org`和 `http://registry.npm.taobao.org` 将在 **2022.06.30** 号正式下线和停止 DNS 解析。

新域名为 `npmmirror.com`, 相关服务域名切换规则请参考：

```bash
http://npm.taobao.org => http://npmmirror.com
http://registry.npm.taobao.org => http://registry.npmmirror.com

npm config set registry http://registry.npmmirror.com
```



## package.json文件

```bash
# 创建, 初始化
npm init

npm init --yes
```

```json
{
  "name": "koa_url",
  "version": "1.0.0",
  "description": "koa项目",
  "main": "app.js",
  "dependencies": {
    "koa": "^2.0.0",
    "koa-router": "^7.0.0",
    "koa-bodyparser": "^3.2.0"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node app.js"
  },
  "repository": {
    "type": "git",
    "url": "https://gitee.com/wangyuedong94/tensorflow"
  },
  "keywords": [
    "koa",
    "async"
  ],
  "author": "Wangyuedong",
  "license": "ISC"
}
```

## 常用命令

```bash
npm -v
# 查看 npm 的版本

npm -l
# 查看各个命令的简单用法

npm help
# 查看 npm 命令列表

npm config list -l
# 查看 npm 的配置

npm init
# 初始化package.json

npm list
npm list --depth 0
npm ls
# 当前项目安装的所有模块

npm root -g
# 列出全局安装路径

npm list -g --depth 0
# 列出全局安装的模块

npm install
# 读取package.json里面的配置单安装 

npm install package
# 默认安装指定模块的最新(@latest)版本

npm install package@version
# 安装指定模块的指定版本

npm uninstall package [-g]
# 卸载当前项目或全局模块

npm update package [-g]
# 升级当前项目或全局的指定模块

npm run
# 执行script脚本

npm install -g yarn
# 安装yarn工具
```

## 发布模块

用户名：wangyuedong

邮箱：1730764704@qq.com

密码：wyd19940118

```bash
# 未注册 申请注册一个用户 直接在https://www.npmjs.com/注册一样
$ npm adduser
//执行后 填写几个问题 Username、Password、Email

#已注册
$ npm login 

#发布
$ npm publish
```


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