Asynchronous error handling

Asynchronous errors in a promise chain are handled with .catch(), which intercepts any rejection that occurred earlier in the chain, and with .finally() for cleanup code. A rejected promise with no handler causes an "unhandled rejection" error: every chain should end with a catch.

charger()
  .then(afficher)
  .catch((e) => console.error(e))
  .finally(masquerChargement)

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