TriggerOnceIf

A one-shot trigger that fires only when the player does possess the specified flag or item. Once it fires it removes itself, so it will never fire again.

Typical use: gate an event or reward on the player already carrying a required item — e.g. react to the player arriving at a location while holding the Chalice, then vanish so the scene plays out only once.

Constructor

new TriggerOnceIf(terrain, test, color, message)

Source:

pieces/terrain/triggers.js, line 266

Parameters:

Name	Type	Description
`terrain`	Terrain	The underlying terrain this decorator wraps.
`test`	string	Flag name or item name whose presence allows the trigger to fire.
`color`	Color	Color event broadcast to the board on firing.
`message`	string \| null	Optional modal message shown to the player.