包描述性文件 package.json

定义

name：包名（必须是唯一的防止对外公布时产生冲突）

description：包简介

version：版本号

keywords：关键词数组

repositories：托管源代码位置列表

author：包作者

bin：一些包作者希望包可以作为命令行工具使用，配置好bin字段后，通过 npm install name -g 后可以将添加到执行路径中,之后可以再命令行中直接执行

main：模块引入方法require()在引入包时，会优先检查这个字段，并将其作为包中其余模块的入口，若该没有默认为index

dependencies：使用当前宝所需要的依赖的包列表（重要）

devDependencies：使用当前宝所需要的依赖的包列表（重要）

engine：支持引擎列表

script：脚本说明对象。主要被包管理器用来安装、编译、测试和卸载包。

例子

express项目的package.json文件

{ 
    "name": "express", 
    "description": "Sinatra inspired web development framework", 
    "version": "3.3.4", 
    "author": "TJ Holowaychuk <tj@vision-media.ca>", 
    "contributors": [ 
        { 
            "name": "TJ Holowaychuk", 
            "email": "tj@vision-media.ca" 
        }, 
        { 
            "name": "Aaron Heckmann", 
            "email": "aaron.heckmann+github@gmail.com" 
        }, 
        { 
            "name": "Ciaran Jessup", 
            "email": "ciaranj@gmail.com" 
        }, 
        { 
            "name": "Guillermo Rauch", 
            "email": "rauchg@gmail.com" 
        } 
    ], 
    "dependencies": { 
        "connect": "2.8.4", 
        "commander": "1.2.0", 
        "range-parser": "0.0.4", 
        "mkdirp": "0.3.5", 
        "cookie": "0.1.0", 
        "buffer-crc32": "0.2.1", 
        "fresh": "0.1.0", 
        "methods": "0.0.1", 
        "send": "0.1.3", 
        "cookie-signature": "1.0.1", 
        "debug": "*" 
    }, 
    "devDependencies": { 
        "ejs": "*", 
        "mocha": "*", 
        "jade": "0.30.0", 
        "hjs": "*", 
        "stylus": "*", 
        "should": "*", 
        "connect-redis": "*", 
        "marked": "*", 
        "supertest": "0.6.0" 
    },
    "keywords": [ 
        "express", 
        "framework", 
        "sinatra", 
        "web", 
        "rest", 
        "restful", 
        "router", 
        "app", 
        "api" 
    ], 
    "repository": "git://github.com/visionmedia/express", 
    "main": "index", 
    "bin": { 
        "express": "./bin/express" 
    }, 
    "scripts": { 
        "prepublish": "npm prune", 
        "test": "make test" 
    }, 
    "engines": { 
        "node": "*" 
    } 
}