使用gulp压缩js详细步骤笔记

先要安装nodejs，初始化项目配置文件package.json，根据情况输入配置参数

npm init

 1 test command:
 2 git repository:
 3 keywords:
 4 author:
 5 license: (ISC)
 6 About to write to E:\temp\20170429\test03\package.json:
 7 
 8 {
 9   "name": "test03",
10   "version": "1.0.0",
11   "description": "",
12   "main": "index.js",
13   "scripts": {
14     "test": "echo \"Error: no test specified\" && exit 1"
15   },
16   "author": "",
17   "license": "ISC"
18 }

npm init