--- title: "Quests: API" package: "@phaser-ae/quests" tier: Free version: 3.0.0-0 released: 2026-10-19 updated: 2026-10-19 description: "A quest log for any game, with ordered steps of kinds you can add, givers who offer and take back quests, acts that open as the story advances, and saves." url: https://phaser.io/packs/quests/api site: Phaser - https://phaser.io --- # Quests: API `@phaser-ae/quests` — A quest log: ordered steps of registrable kinds, acts that open as main quests end, offers and turn-ins by giver, counts from acceptance, events and saves. ## The pack ### `quests` ```ts function quests(): Pack<{ quests: typeof api }> ``` Install the quests API (`game.quests`): the quest log and its step rules. ## Helpers ### `createQuestLog` ```ts const createQuestLog = (quests: readonly QuestDef[], o?: QuestLogOptions): QuestLog=> … ``` A quest log over a set of quests. ### `STEP_RULES` ```ts const STEP_RULES: Readonly> ``` The built-in step kinds: talk to, kill, fetch (hold), reach, deliver to (talk, handing the item over). ## Classes ### `QuestLog` ```ts class QuestLog ``` A quest log over a fixed set of quests. - `readonly quests: readonly QuestDef[]` — The quests, in the order given. - `readonly acts: number` — How many acts there are. - `state: QuestState` — The state. - `constructor(quests: readonly QuestDef[], o: QuestLogOptions = {})` - `quest(id: string): QuestDef | undefined` — A quest by id. - `drain(): QuestEvent[]` — Every event since the last call. - `stepDone(q: QuestDef, i: number): boolean` — Is one step done on its own terms (ignoring order). - `steps(q: QuestDef): boolean[]` — Which steps are done, in order: a step counts only once every step before it is done. A finished quest is all done. - `current(q: QuestDef): number` — The first step not yet done, or -1. - `complete(q: QuestDef): boolean` — Every step is done (a quest with no steps is done at once). - `isActive(id: string): boolean` — Accepted and not finished. - `isDone(id: string): boolean` — Finished. - `act(): number` — The act the game is in: 1, and one more for every act whose main quests are all done (an act with none ends nothing). - `available(q: QuestDef): boolean` — Can this quest be offered now: not taken, and its act reached. - `offers(giverId: string): QuestDef[]` — Quests a giver could offer now. - `ready(giverId: string): QuestDef[]` — A giver's active quests whose steps are all done: ready to turn in. - `waiting(giverId: string): QuestDef[]` — A giver's active quests still being worked on. - `activeQuests(): QuestDef[]` — The active quests, as definitions. - `doneQuests(): QuestDef[]` — The finished quests, as definitions. - `accept(q: QuestDef): boolean` — Accept a quest: counters start from now. False when it is already taken or done. - `turnIn(q: QuestDef): { gold: number; itemId: string | null } | null` — Turn a quest in: it moves to done and the reward is reported (the game pays it). Null when it is not active. - `count(key: string, id: string, n = 1): void` — Count something (a kill): `count('kill', 'wolf')`. - `flag(key: string, id: string): void` — Set a flag (a region reached): `flag('reach', 'stonereach')`. - `mark(q: QuestDef, step: number): void` — Mark one step done by hand (a scripted moment); the steps before it stay done from then on. - `refresh(): void` — Re-read `held` steps (after the bag changed). - `event(key: string, id: string): { quest: string; step: number; itemId: string | null }[]` — An event named a target (`talk` with an npc id): every active quest whose current step is a `mark` step of that event and target is marked, handing its item over where the rule says so, and again while that unlocks the next. Returns the steps it completed. - `talk(npcId: string): { quest: string; step: number; itemId: string | null }[]` — Talking to an npc: `event('talk', npcId)`. - `snapshot(): QuestState` — The state, as plain data. - `restore(data: unknown): boolean` — Read saved state defensively: unknown quests are dropped, a quest is never both active and done. False when it is not a quest state. ## Types ### `QuestDef` ```ts interface QuestDef ``` A quest. - `id: string` — Unique among the quests. - `title?: string` — Its title. - `act?: number` — The act it belongs to: it is offered from that act on. Default 1. - `main?: boolean` — Whether it is a main quest: an act ends when all its main quests are done. - `giverId?: string` — Who offers it and takes it back. - `steps: readonly QuestStepDef[]` — The steps, in order: a step counts only once every step before it is done. - `rewardGold?: number` — Gold paid on completion. - `rewardItemId?: string | null` — An item given on completion. ### `QuestEvent` ```ts type QuestEvent = /** A quest was accepted. */ | { type: 'accepted'; quest: string } /** A step was completed. */ | { type: 'step'; quest: string; step: number } /** An item was handed over for a step. */ | { type: 'handed'; quest: string; step: number; itemId: string } /** Every step is done: the quest can be turned in. */ | { type: 'ready'; quest: string } /** A quest was turned in. */ | { type: 'done'; quest: string; gold: number; itemId: string | null } /** A new act began. */ | { type: 'act'; act: number } ``` What the log reports. ### `QuestHost` ```ts interface QuestHost ``` What a log asks of its game. - `held?(itemId: string): number` — How many of an item are held, for `held` steps. Default none. - `take?(itemId: string): boolean` — Take an item for a `hands` step; false when it is not held. Default: whatever `held` says, nothing taken. - `deliverItem?(quest: QuestDef, step: number): string | null` — The item a `hands` step hands over when the step names none; null for a plain talk. ### `QuestLogOptions` ```ts interface QuestLogOptions ``` What a log is made with. - `rules?: Readonly>` — Step rules, over `STEP_RULES`. - `acts?: number` — How many acts there are. Default the highest act any quest names, at least 1. - `host?: QuestHost` — The game. ### `QuestState` ```ts interface QuestState ``` The log's state, as plain data. - `active: string[]` — Accepted quest ids, in order. - `done: string[]` — Finished quest ids, in order. - `counts: Record>` — Counters by name, then target id (kills). - `flags: Record>` — Flags by name, then target id (regions reached). - `marks: Record` — Marked steps, keyed `questId#step`: done for good, whatever their rule (a step is marked when a later one is). - `base: Record` — Counter values when a quest was accepted, keyed `questId#step`. ### `QuestStepDef` ```ts interface QuestStepDef ``` One step of a quest. - `kind: string` — What counts as doing it: a key of the log's step rules (built in: talk, kill, fetch, reach, deliver). - `targetId: string` — What the step names (an npc, a monster, an item, a region); '' for a step that names nothing, which is done at once unless its rule says otherwise. - `count?: number` — How many times (kills, items held). Default 1. - `text?: string` — What the player is told. - `itemId?: string | null` — For a step that hands something over: the item. Default the host's `deliverItem`, else the nearest earlier `held` step's target. ### `StepRule` ```ts interface StepRule ``` How a step kind is judged: - `count`: a counter (`key`, default the kind) for the target reaches the step's count, counted from acceptance; - `flag`: a flag (`key`) for the target has been set; - `held`: the host holds the step's count of the target (or the step was marked); - `mark`: an event (`key`) named the target while this was the current step; `hands` makes it take an item. - `by: 'count' | 'flag' | 'held' | 'mark'` — How it is judged. - `key?: string` — The counter, flag or event name. Default the step kind. - `hands?: boolean` — A `mark` step that hands the item over: it is done only when the host takes it. - `lifetime?: boolean` — A `count` step counts every kill ever, not only those after acceptance. 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