attempt

function attempt(
   existing,
   file,
   rules?
):
  | FileAccepted
  | FileRejected;

Try to accept one file against a list.

Returns what would happen without mutating anything, so the caller can report each rejection with its own reason rather than silently dropping half a selection.

Parameters

Parameter	Type
existing	File[]
file	File
rules	FileRules

Returns

| FileAccepted | FileRejected