createFactory is deprecated Warning in react 16.13.1

[macrozone]

What you were expecting:

No warnings

What happened instead:

      Warning: React.createFactory() is deprecated and will be removed in a future ma
jor release. Consider using JSX or use React.createElement() directly instead.

      at printWarning (packages/dataprovider/node_modules/react/cjs/react.development
.js:315:30)
      at warn (node_modules/react/cjs/react.development.js:278:5)
      at createFactoryWithValidation (node_modules/react/cjs/react.development.js:1827:7)
      at node_modules/recompose/shouldUpdate.js:25:44
      at Object.pure [as default] (node_modules/recompose/pure.js:29:97)
      at Object.<anonymous> (node_modules/ra-core/lib/util/FieldTitle.js:19:33)

Steps to reproduce:

update to react 16.13.1

Related code:

its actually an upstream issue from recompose: acdlite/recompose#795

unforunatly, the pull request is not merged and it does not seem to be active.

an alternative would be to use React.memo instead of pure from recompose

Environment

• React-admin version: 3.4.1
• Last version that did not exhibit the issue (if applicable):
• React version: 16.13.1
• Browser: chrome 80
• Stack trace (in case of a JS error): see above

[djhi]

Yes, I noticed those annoying warnings as well. Now that most of our components use hooks, we can probably remove recompose.

[fzaninotto]

Fixed by #4786