I use react-intl for internationalization and in a component i get and set the locale-data like that :
import fr from 'react-intl/locale-data/fr';
import en from 'react-intl/locale-data/en';
...
addLocaleData([...fr, ...en]);
But the library to migrate to formatJs and I don't see how to do the same with the new syntax or if I need to install something else.
If someone has an idea ??
This should fix your issue: https://formatjs.io/docs/react-intl/upgrade-guide-3x#migrate-to-using-native-intl-apis For react-native you'd need a bunch of polyfills from https://formatjs.io/docs/polyfills:
Intl.getCanonicalLocales
Intl.PluralRules
Intl.NumberFormat
Intl.DateTimeFormat
Intl.RelativeTimeFormat