webpack hello.js hello.bundle.js 报错
$ webpack hello.js hello.bundle.js
C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:244
throw err;
^
TypeError: Cannot read property 'length' of undefined
at processConfiguredOptions (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\bin\convert-argv.js:160:44)
at module.exports (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\bin\convert-argv.js:148:10)
at yargs.parse (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:241:39)
at Object.parse (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\_yargs@11.1.0@yargs\yargs.js:552:18)
at C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:219:8
at Object.<anonymous> (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:530:3)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (internal/modules/cjs/helpers.js:25:18)
at runCli (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack\bin\webpack.js:54:2)
at Object.<anonymous> (C:\Users\yu\AppData\Roaming\npm\node_modules\webpack\bin\webpack.js:147:2)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
