v4.0.1 is a maintenance release that includes minor bug fixes and documentation updates.

:bug: Bug Fix

• react-scripts
  • #9921 Fix noFallthroughCasesInSwitch/jsx object is not extensible (@ryota-murakami)
  • #9869 Fix react-jsx error (@benneq)
  • #9885 fix: React is not defined compilation error after ejected (@n3tr)
  • #9911 fix: slow recompile time (@FezVrasta)
• react-dev-utils
  • #9884 fix: page doesn't get refreshed when FAST_REFRESH=false (@n3tr)

:nail_care: Enhancement

• react-scripts
  • #10048 Increase Workbox's maximumFileSizeToCacheInBytes (@jeffposnick)

:memo: Documentation

• #10052 docs: add React Testing Library as a library requiring jsdom (@anyulled)

:house: Internal

• create-react-app, react-dev-utils, react-scripts
  • #10083 replace inquirer with prompts (@EvanBacon)
• cra-template-typescript, cra-template, react-scripts
  • #9516 [ImgBot] Optimize images (@MichaelDeBoey)
• Other
  • #9860 chore: Update .prettierrc (@MichaelDeBoey)

Committers: 9

• Anyul Rivas (@anyulled)
• Ben M (@benneq)
• Evan Bacon (@EvanBacon)
• Federico Zivolo (@FezVrasta)
• Jeffrey Posnick (@jeffposnick)
• Jirat Ki. (@n3tr)
• Michaël De Boey (@MichaelDeBoey)
• Ryota Murakami (@ryota-murakami)
• sho90 (@sho-t)

Migrating from 4.0.0 to 4.0.1

Inside any created project that has not been ejected, run:

npm install --save --save-exact react-scripts@4.0.1

or

yarn add --exact react-scripts@4.0.1