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melonjs-events

Use this skill for the melonJS event bus and lifecycle hooks — subscribing to engine events, the per-frame and per-state event names, renderable lifecycle callbacks, and how to unsubscribe without leaking. Triggers on: event.on, event.off, event.once, event.emit, GAME_UPDATE, GAME_BEFORE_DRAW, LEVEL_LOADED, LOADER_COMPLETE, STATE_CHANGE, CANVAS_ONRESIZE, POINTERMOVE, WORLD_STEP, onActivateEvent, onDeactivateEvent, onDestroyEvent, lifecycle, subscribe, listener.

packages/melonjs/skills/melonjs-events/SKILL.md

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Network or broad shell
Last checked
Nov 5, 2026

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6,440
Repository last updated
Nov 7, 2026
License
MIT

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# Events and lifecycle

## The bus

```js
import { event } from "melonjs";

const onUpdate = () => { /* … */ };
const unsubscribe = event.on(event.GAME_UPDATE, onUpdate);  // on() returns its own off()
event.once(event.LEVEL_LOADED, () => { /* … */ });

// two ways to undo it — the same reference, or the returned function
event.off(event.GAME_UPDATE, onUpdate);
unsubscribe();