npm package arg:解析可以作为`npm install`参数的内容 源码

npm-package-arg 解析传递给命令(如npm install或npm cache add )或在package.json依赖项部分中找到的包名称和说明符。 例子 var assert = require ( "assert" ) var npa = require ( "npm-package-arg" ) // Pass in the descriptor, and it'll return an object try { var parsed = npa ( "@bar/foo@1.2" ) } catch ( ex ) { ... } 使用 var npa = require('npm-package-arg') var result = npa( arg [, where ]) ARG -一个字符串,你可能会传递给npm install ,如: foo@1.2