无法用'npm run build'替换命令'webpack'

请有人向我解释一下。我想使用命令npm run build来调用webpack。所以我修改了文件package.json中的脚本。但它没有用。我正在使用linux

这是我的package.json文件

{
  "name": "learn-webpack",
  "version": "1.0.0",
  "description": "Learn Webpack",
  "main": "index.js",
  "scripts": {
    "build": "webpack"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.6.1",
    "css-loader": "^0.28.11",
    "style-loader": "^0.20.3",
    "webpack": "^4.2.0"
  }
}

这是错误，它已经安装了cli但它继续发送此消息

The CLI moved into a separate package: webpack-cli.
Please install 'webpack-cli' in addition to webpack itself to use the CLI.
-> When using npm: npm install webpack-cli -D
-> When using yarn: yarn add webpack-cli -D
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: `webpack`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm.
         There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/huong/.npm/_logs/2018-03-27T14_09_22_103Z-debug.log

如果你直接调用一个函数

  "scripts": {
    "build": "webpack"
  },

Webpack作为来自$ PATH的命令进行搜索。使用npm install webpack-cli -D不是全局安装在$ PATH下，而是在./node_modules下本地安装。

因此，您有两个选择：

• 全局安装（-g）：npm -g i webpack-cli
• 从node_module目录运行它：node_modules/<path to webpack>