Error: Can't resolve 'os' in 'C:\Users\MKKIM\Desktop\ts-reddit\my-app\src\contexts'

[esther615kim]

ERROR in ./src/contexts/authContext.js 6:0-30 Module not found: Error: Can't resolve 'os' in 'C:\Users\MKKIM\Desktop\ts-reddit\my-app\src\contexts'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default. This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:

• add a fallback 'resolve.fallback: { "os": require.resolve("os-browserify/browser") }'
• install 'os-browserify' If you don't want to include a polyfill, you can use an empty module like this: resolve.fallback: { "os": false } resolve 'os' in 'C:\Users\MKKIM\Desktop\ts-reddit\my-app\src\contexts' Parsed request is a module using description file: C:\Users\MKKIM\Desktop\ts-reddit\my-app\package.json (relative path: ./src/contexts) Field 'browser' doesn't contain a valid alias configuration resolve as module C:\Users\MKKIM\Desktop\ts-reddit\my-app\src\contexts\node_modules doesn't exist or is not a directory C:\Users\MKKIM\Desktop\ts-reddit\my-app\src\node_modules doesn't exist or is not a directory looking for modules in C:\Users\MKKIM\Desktop\ts-reddit\my-app\node_modules
  single file module using description file: C:\Users\MKKIM\Desktop\ts-reddit\my-app\package.json (relative path: ./node_modules/os) no extension Field 'browser' doesn't contain a valid alias configuration C:\Users\MKKIM\Desktop\ts-reddit\my-app\node_modules\os doesn't exist
  .web.mjs Field 'browser' doesn't contain a valid alias configuration C:\Users\MKKIM\Desktop\ts-reddit\my-app\node_modules\os.web.mjs doesn't exist .mjs Field 'browser' doesn't contain a valid alias configuration C:\Users\MKKIM\Desktop\ts-reddit\my-app\node_modules\os.mjs doesn't exist .web.js Field 'browser' doesn't contain a valid alias configuration C:\Users\MKKIM\Desktop\ts-reddit\my-app\node_modules\os.web.js doesn't exist .js Field 'browser' doesn't contain a valid alias configuration C:\Users\MKKIM\Desktop\ts-reddit\my-app\node_modules\os.js doesn't exist
  .web.ts

[esther615kim]

[esther615kim]

https://stackoverflow.com/questions/70398678/i-tried-to-polyfill-modules-in-webpack-5-but-not-working-reactjs

[esther615kim]

https://github.com/facebook/create-react-app/issues/11756