Node工程快速入门

背景说明

Node环境安装完成后，这里创建一个简单的工程进行入门

解决方案

创建项目

创建目录nodedemo

$ mkdir nodedemo
86183@LAPTOP-CRFK470 MINGW64 /c
$ ls
nodedemo/
86183@LAPTOP-CRFFK470 MINGW64 /c
$ cd nodedemo/
86183@LAPTOP-CRFFK470 MINGW64 /c/nodedemo
$

初始项目

通过node init命令初始化项目

86183@LAPTOP-CRFFK470 MINGW64 /c/nodedemo
$ npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.
See `npm help init` for definitive documentation on these fields
and exactly what they do.
Use `npm install <pkg>` afterwards to install a package and
save it as a dependency in the package.json file.
Press ^C at any time to quit.
package name: (nodedemo)
version: (1.0.0)
description:
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)
About to write to C:\nodedemo\package.json:
{
  "name": "nodedemo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}
Is this OK? (yes)
86183@LAPTOP-CRFFK470 MINGW64 /c/nodedemo
$

经常用Git的可能都会觉得git bash比cmd好用一些，不仅在样式上，git bash还支持ssh、ls、cp、mv、vi这些Linux常见命令

可以看到生成了一个文件

86183@LAPTOP-CRFFK470 MINGW64 /c/nodedemo
$ ls
package.json

文件内容如下

{
  "name": "nodedemo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

ISC开源协议参见文档：https://opensource.org/licenses/ISC

编写脚本app.js

var greeting='hello wold nodejs';
console.log(greeting)

项目运行

$ node app.js
hello wold nodejs
86183@LAPTOP-CRFFK470 MINGW64 /c/nodedemo
$