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[v4] Fallback to full reload if React version doesn't support Fast Refresh

Closed Administrator requested to merge github/fork/n3tr/fix-reload-when-fr-disabled into master

Created by: n3tr

Changes

Fallback to the full reload if React version doesn't support Fast Refresh

  • Overwrite FAST_REFRESH to false if the current react version doesn't support (< 16.10.0)
  • Remove Fast Refresh warning on the older react version since we will automatically fallback to do full reload.

Verify steps

Default setup

  • yarn create-react-app my-app
  • yarn start
  • Modify App.js content
  • The app gets updated through Fast Refresh

FAST_REFRESH=false

  • Start the app by using FAST_REFRESH=false yarn start
  • Modify App.js
  • The app should do a full reload

React version that Fast Refresh is unavailable (e.g. 15)

  • Change React version to 15.7.0
    • yarn add react@15.7.0 react-dom@15.7.0
    • Remove <React.StrictMode> from index.js
  • yarn start and
  • Modify App.js
  • The app should do a full reload