npm run test报错

"webpack": "^4.41.0",
"webpack-cli": "^3.3.9",
"webpack-dev-server": "^3.8.1"
"copy-webpack-plugin": "^5.0.4",

package.json中的test:

    "scripts": {"test": "npx webpack-dev-server --config webpack.config.js"},

报错:

PS D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server> npm run test
Debugger attached.> 01-webpack-introductory@1.0.0 test D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server
> npx webpack-dev-server --config webpack.config.jsDebugger attached.
Debugger attached.
Waiting for the debugger to disconnect...
D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\schema-utils\src\validateOptions.js:32throw new ValidationError(ajv.errors, name);^ValidationError: CopyPlugin Invalid Optionsoptions should be arrayat validateOptions (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\schema-utils\src\validateOptions.js:32:11)at new CopyPlugin (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\copy-webpack-plugin\dist\index.js:26:30)at Object.<anonymous> (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\webpack.config.js:120:9)at Module._compile (internal/modules/cjs/loader.js:1063:30)at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)at Module.load (internal/modules/cjs/loader.js:928:32)at Function.Module._load (internal/modules/cjs/loader.js:769:14)at Module.require (internal/modules/cjs/loader.js:952:19)at require (internal/modules/cjs/helpers.js:88:18)at WEBPACK_OPTIONS (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\webpack-cli\bin\utils\convert-argv.js:114:13)at requireConfig (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\webpack-cli\bin\utils\convert-argv.js:116:6)at D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\webpack-cli\bin\utils\convert-argv.js:123:17at Array.forEach (<anonymous>)at module.exports (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\webpack-cli\bin\utils\convert-argv.js:121:15)at Object.<anonymous> (D:\Project\WebStudy\zhiboyu\webpack\24_webpack_dev_server\node_modules\webpack-dev-server\bin\webpack-dev-server.js:84:40)at Module._compile (internal/modules/cjs/loader.js:1063:30) {errors: [{keyword: 'type',dataPath: '',schemaPath: '#/type',params: { type: 'array' },message: 'should be array'}]
}
Waiting for the debugger to disconnect...
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! 01-webpack-introductory@1.0.0 test: `npx webpack-dev-server --config webpack.config.js`npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the 01-webpack-introductory@1.0.0 test 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!     C:\Users\kirin\AppData\Roaming\npm-cache\_logs\2021-05-21T07_51_47_749Z-debug.log
Waiting for the debugger to disconnect...

其中主要是这里(webpack.config.js出错):

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! 01-webpack-introductory@1.0.0 test: `npx webpack-dev-server --config webpack.config.js`npm ERR! Exit status 1

解决:
在webpack.config.js中下面这一段出错:

new CopyWebpackPlugin({patterns:[{ from: "./doc", to: "doc" }]}),

修改为:

new CopyWebpackPlugin([{ from: "./doc", to: "doc" }]),

然后就跑成功了,

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