npm 相关

nmp相当于java中的maven

1. 查看配置
   npm config list
cnpm config list --淘宝镜像
   npm config ls -l -- 配置 detail
   cnpm config ls -l -- 淘宝配置 detail

2. install 包并更行package.json
   npm install xxx --save
npm install yyy --save-dev
   执行后的package.json新增相应的依赖:

{
  "name": "demo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "xxx": "^1.0.2"
  }
  "devDependencies": {
    "yyy": "^1.0.2"
  }
}