Errors

Every rejection is a DoxorError. Check error.code; the original error is in error.cause.

try {
  await db.users.insert(user)
} catch (error) {
  if (error instanceof DoxorError && error.code === 'Constraint') showEmailTaken()
  else throw error
}

Error codes

Code	Meaning
Constraint	The key or a unique index value already exists.
NotFound	The collection or index does not exist.
Data	Not a valid key, or a required key is missing.
DataClone	The value cannot be stored (functions, DOM nodes, proxies).
Quota	The storage quota is exceeded.
ReadOnly	A write in a readonly transaction.
TransactionInactive	The transaction committed before the work finished (an await on non-IndexedDB work).
Outdated	Newer code upgraded the database; reload before writing.
SchemaConflict	An incompatible schema change without a migration.
Migration	A migration failed, or a previous upgrade did not finish.
Version	The database kept changing version during an upgrade (concurrent upgrades).
Unavailable	No IndexedDB in this environment (SSR, some private modes).
Aborted	The transaction or open was aborted.
Unknown	Anything else; see cause.

The codes are stable, so it is safe to branch on them.

See also: transactions for TransactionInactive, migrations for SchemaConflict and Migration, and multiple tabs for Outdated.