[Webpack] Error: clean-webpack-plugin only accepts an options object. See: https://github.com/johnagan/clean-webpack-plugin#options-and-defaults-optional

Webpack - 웹팩

Error - 오류

Error: clean-webpack-plugin only accepts an options object. See:
            https://github.com/johnagan/clean-webpack-plugin#options-and-defaults-optional
    at new CleanWebpackPlugin (..client\node_modules\clean-webpack-plugin\dist\clean-webpack-plugin.js:27:13)
    at module.exports (..client\webpack.config.js:571:21)
    at handleFunction (..client\node_modules\webpack-cli\bin\utils\prepareOptions.js:21:13)
    at prepareOptions (..client\node_modules\webpack-cli\bin\utils\prepareOptions.js:9:5)
    at requireConfig (..client\node_modules\webpack-cli\bin\utils\convert-argv.js:119:14)
    at ..client\node_modules\webpack-cli\bin\utils\convert-argv.js:125:17
    at Array.forEach (<anonymous>)
    at module.exports (..client\node_modules\webpack-cli\bin\utils\convert-argv.js:123:15)
    at yargs.parse (..client\node_modules\webpack-cli\bin\cli.js:71:45)
    at Object.parse (..client\node_modules\webpack-cli\node_modules\yargs\yargs.js:567:18)
    at ..client\node_modules\webpack-cli\bin\cli.js:49:8
    at Object.<anonymous> (..client\node_modules\webpack-cli\bin\cli.js:365:3)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)
    at Module.require (internal/modules/cjs/loader.js:636:17)

Problem - 문제

엉겁결에 CleanWebpackPlugin를 업그레이드 시켰더니 문제가 발생했다.
CleanWebpackPlugin 3.0.0부터 다루는 법이 조금 바뀌었다.

Solved - 해결

• BEFORE

  new CleanWebpackPlugin(['dist'], {}),

• AFTER

  new CleanWebpackPlugin(),

Reference - 참고

• clean-webpack-plugin only accepts an options object: https://stackoverflow.com/questions/55190450/clean-webpack-plugin-only-accepts-an-options-object