React，Error: Cannot find module 'webpack'

Error: Cannot find module 'webpack'

at Function.Module._resolveFilename (module.js:547:15)

at Function.Module._load (module.js:474:25)

at Module.require (module.js:596:17)

at require (internal/module.js:11:18)

at Object. (D:\Program\antd\antd-demo\scripts\start.js:19:17)

at Module._compile (module.js:652:30)

at Object.Module._extensions..js (module.js:663:10)

at Module.load (module.js:565:32)

at tryModuleLoad (module.js:505:12)

at Function.Module._load (module.js:497:3)

error Command failed with exit code 1.

info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this comm

and.

方法：在项目的路径下，cmd

npm install webpack

不用npm install -g webpack

网上有npm install webpack-cli完全没用 ！！！