ERROR in Entry module not found: Error: Can't resolve 'webpack-dev-server --open' in 'D:\study\webpack-demo'

ERROR in (webpack)-dev-server/client?http://localhost:8080
Module build failed: Error: ENOENT: no such file or directory, open 'D:\study\webpack-demo\node_modules\webpack-dev-server\client\index.js'
 @ multi (webpack)-dev-server/client?http://localhost:8080 ./src/index.js app[0]

ERROR in multi (webpack)-dev-server/client?http://localhost:8080 webpack-dev-server --open
Module not found: Error: Can't resolve 'webpack-dev-server --open' in 'D:\study\webpack-demo'
 @ multi (webpack)-dev-server/client?http://localhost:8080 webpack-dev-server --open start[1]

當你運行得項目中出現以上報錯，看看webpack.config.js 文件中 配置是否出錯？

 derServer: {
     	contentBase: './dist' 
  },

解決方法：本地出錯得原因是 ， 鍵盤敲錯了！或者 改正重新運行即可

devServer: { // 此處配置名稱寫錯了
contentBase: ‘./dist’
},

entry: {
    app: './src/index.js',
    print: './src/print.js',
    "start": "webpack-dev-server --open" //  或者此處引用錯誤
  },

總結： 是webpack 原生結構的配置寫錯了