Variable: REASONS

const REASONS: Readonly<Record<FileSystemErrorName, SystemErrorReason>>;

The reason of each DOMException a handle fails with:

Name	Reason	Of
`NotFoundError`	`NotFound`	an entry that is not there
`TypeMismatchError`	`BadResource`	an entry of the other kind
`InvalidModificationError`	`BadResource`	a folder not empty, a folder into itself
`InvalidStateError`	`BadResource`	a handle or a writable of no more use
`NoModificationAllowedError`	`Busy`	an entry another writable holds
`NotAllowedError`	`PermissionDenied`	what may not be read or written
`SecurityError`	`PermissionDenied`	what the page may not reach
`QuotaExceededError`	`WriteZero`	a write with no room left
`NotReadableError`	`InvalidData`	a snapshot stale, a read failed
`TimeoutError`	`TimedOut`	a wait that ran out
`NotSupportedError`	`Unknown`	what the platform does not do
`AbortError`	`Unknown`	a call aborted

The cause’s name tells two of one reason apart.