javascript - npm start 運行'webpack-dev-server'報錯 Cannot find module 'webpack'

Question

執行 cnpm start 運行"webpack-dev-server " 後報錯：沒有找到webpack。
packge.json檔案內容如下：

{
      "name": "test",
      "version": "1.0.0",
      "description": "",
      "main": "index.js",
      "scripts": {
        "start": "webpack-dev-server "
      },
      "author": "",
      "license": "ISC",
      "dependencies": {
        "webpack-dev-server": "^2.4.5"
      }
  }

webpack.config.js:

#執行 ：
報錯：

我全域安裝的webpack 不知道為什麼會報找不到webpack。
但是自己手動輸入 'webpack-dev-server'
運行成功:

#希望知道是什麼原因

Answer 1

試下npm run start

Answer 2

webpack.config.js里使用了webpack，所以webpack也需局部安裝（本項目）相依性；