Vue教程（一）WebPack安装

新建WebPack文件夹
初始化npm
PS E:\COLDDEMO\js源码示例\WebPack> 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 json 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: (webpack) myproject//项目名称
version: (1.0.0)//项目版本号
description: 凌云木项目//项目描述
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)
About to write to E:\COLDDEMO\js源码示例\WebPack\package.json:

{
"name": "myproject",
"version": "1.0.0",
"description": "凌云木项目",
"main": "index.js",
"scripts": {
"test": "echo "Error: no test specified" && exit 1"
},
"author": "",
"license": "ISC"
}

Is this OK? (yes) yes

---

PS E:\COLDDEMO\js源码示例\WebPack> npm install webpack --save-dev//本地安装webpack

---

npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN myproject@1.0.0 No repository field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

• webpack@4.5.0
  added 295 packages from 269 contributors in 59.622s
  PS E:\COLDDEMO\js源码示例\WebPack> webpack list.js build.js
  The CLI moved into a separate package: webpack-cli
  Would you like to install webpack-cli? (That will run npm install -D webpack-cli) (yes/NO)no
  It needs to be installed alongside webpack to use the CLI

---

PS E:\COLDDEMO\js源码示例\WebPack> npm uninstall webpack//卸载当前版本
npm WARN myproject@1.0.0 No repository field.

removed 295 packages in 2.864s

---

PS E:\COLDDEMO\js源码示例\WebPack> webpack -v//查看版本号
3.10.0

---

PS E:\COLDDEMO\js源码示例\WebPack> npm install --save-dev webpack@3.10.0 //安装其他4.0以下版本，4.0以上版本，打包会报错，未知。

---

uglifyjs-webpack-plugin@0.4.6 postinstall E:\COLDDEMO\js源码示例\WebPack\node_modules\uglifyjs-webpack-plugin
node lib/post_install.js
npm WARN myproject@1.0.0 No repository field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

• webpack@3.10.0
  added 336 packages from 275 contributors in 133.941s

---

PS E:\COLDDEMO\js源码示例\WebPack> webpack -v
3.10.0

---

PS E:\COLDDEMO\js源码示例\WebPack> webpack list.js build.js//把list.js文件打包成build.js文件

---

Hash: 44a3af32917d3df32683
Version: webpack 3.10.0
Time: 50ms
Asset Size Chunks Chunk Names
build.js 2.5 kB 0 [emitted] main
[0] ./list.js 22 bytes {0} [built]

---

PS E:\COLDDEMO\js源码示例\WebPack> webpack list.js build.js//重新打包
Hash: 78ebebcbd1f433b2bd80
Version: webpack 3.10.0
Time: 48ms
Asset Size Chunks Chunk Names
build.js 2.5 kB 0 [emitted] main
[0] ./list.js 24 bytes {0} [built]

---

PS E:\COLDDEMO\js源码示例\WebPack>