一、npm start 异常

D:\CodePractice\2021\00_BoilerPlate>npm start

> 00_boilerplate@1.0.0 start D:\CodePractice\2021\00_BoilerPlate

> webpack-dev-server  --mode development --inline --hot --open

internal/modules/cjs/loader.js:589

    throw err;

    ^

Error: Cannot find module 'webpack-cli/bin/config-yargs'

    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:587:15)

    at Function.Module._load (internal/modules/cjs/loader.js:513:25)

    at Module.require (internal/modules/cjs/loader.js:643:17)

    at require (internal/modules/cjs/helpers.js:22:18)

    at Object.<anonymous> (D:\CodePractice\2021\00_BoilerPlate\node_modules\webpack-dev-server\bin\webpack-dev-server.js:65:1)

    at Module._compile (internal/modules/cjs/loader.js:707:30)

    at Object.Module._extensions..js (internal/modules/cjs/loader.js:718:10)

    at Module.load (internal/modules/cjs/loader.js:605:32)

    at tryModuleLoad (internal/modules/cjs/loader.js:544:12)

    at Function.Module._load (internal/modules/cjs/loader.js:536:3)

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! 00_boilerplate@1.0.0 start: `webpack-dev-server  --mode development --inline --hot --open`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the 00_boilerplate@1.0.0 start 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\sinwaj\AppData\Roaming\npm-cache\_logs\2021-03-21T07_26_42_987Z-debug.log

二、package.json版本信息

"dependencies": {

    "webpack-cli": "^4.5.0",

    "webpack-dev-server": "^3.11.2"

  }

三、降级webpack-cli

4.5.0降级到3.3.12

1.D:\CodePractice\2021\00_BoilerPlate>npm uninstall webpack-cli

2.D:\CodePractice\2021\00_BoilerPlate>npm install webpack-cli@^3.3.12

四、重新启动

D:\CodePractice\2021\00_BoilerPlate>npm start

> 00_boilerplate@1.0.0 start D:\CodePractice\2021\00_BoilerPlate

> webpack-dev-server  --mode development --inline --hot --open

i ｢wds｣: Project is running at http://localhost:8080/

i ｢wds｣: webpack output is served from /

i ｢wds｣: Content not from webpack is served from ./dist

i ｢atl｣: Using typescript@4.2.3 from typescript

i ｢atl｣: Using tsconfig.json from D:/CodePractice/2021/00_BoilerPlate/tsconfig.json

WARNING (@babel/preset-env): We noticed you're using the `useBuiltIns` option without declaring a core-js version. Currently, we assume version 2.x when no version is passed. Since this default version will likely change in future versions of Babel, we recommend explicitly setting the core-js version you are using via the `corejs` option.

You should also be sure that the version you pass to the `corejs` option matches the version specified in your `package.json`'s `dependencies` section. If it doesn't, you need to run one of the following commands:

  npm install --save core-js@2    npm install --save core-js@3

  yarn add core-js@2              yarn add core-js@3

More info about useBuiltIns: https://babeljs.io/docs/en/babel-preset-env#usebuiltins

More info about core-js: https://babeljs.io/docs/en/babel-preset-env#corejs

i ｢wdm｣: wait until bundle finished: /

i ｢atl｣: Checking started in a separate process...

i ｢atl｣: Time: 717ms

i ｢wdm｣: Compiled successfully.