1774344 - [meta] Upgrade to React 18

Status: NEW

(DevTools :: General, task)

Description

[Jan Honza Odvarko [:Honza] (always need-info? me)]

React Upgrade Roadmap

• Migrate Enzyme tests to RTL
  • Asking Julien and Greg to review first couple of migrated tests and provide feedback
  • We might use help of existing contributors if possible (first-good-bugs)
  • Migrated perhaps even some Mocha tests (if there is time)
• Upgrade React-Redux to 8.0.1
  • There should be no breaking changes
  • Fix React Warnings
  • They become errors in 17
• Upgrade to React 17
  • Minimum changes in this version, but there are some breaking changes
  • Chunking the upgrade helps to keep the work size and regressions down
  • We are using multiple providers/stores, which might introduce some difficulties
• Upgrade to React 18.x
  • Breaking changes ("asynchronous rendering") but we don’t have to use it.
  • Keep using “ReactDOM.render” (not the new “ReactDOM.createRoot”)

Honza

Comment 1

[Jan Honza Odvarko [:Honza] (always need-info? me)]

Adding existing (and related) bug reports as dependencies.

Comment 2

[Tetsuharu OHZEKI [:tetsuharu] (UTC+9)]

(In reply to Jan Honza Odvarko [:Honza] (always need-info? me) from comment #0)

• Upgrade to React 18.x
  • Keep using “ReactDOM.render” (not the new “ReactDOM.createRoot”)

The latest version of react-testing-library uses ReactDOM.createRoot() internaly instead of ReactDOM.render().
Thus we can switch to use ReactDOM.createRoot() after we complete to migrate to update to v18 and react-testing-library safely.

React v18 still supports ReactDOM.render() but it's warned as deprecated in react-dom development build and recommend to switch to ReactDOM.createRoot(). I think we don't have to keep to use ReactDOM.render.