Class LeaSceneII

listenerMap

on

• on<K extends "draw" | "update">(
      event: K,
      listener: (
          ...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K],
      ) => void,
  ): this

  Registers a listener for the specified event.

  Type Parameters

  • K extends "draw" | "update"

    Event name

  Parameters

  • event: K

    The name of the event

  • listener: (...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K]) => void

    The callback to invoke when the event is emitted

  Returns this

  This emitter for chaining

once

• once<K extends "draw" | "update">(
      event: K,
      listener: (
          ...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K],
      ) => void,
  ): this

  Registers a one-time listener for the specified event.

  The listener is automatically removed after the first invocation.

  Type Parameters

  • K extends "draw" | "update"

    Event name

  Parameters

  • event: K

    The name of the event

  • listener: (...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K]) => void

    The callback to invoke once

  Returns this

  This emitter for chaining

off

• off<K extends "draw" | "update">(
      event: K,
      listener: (
          ...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K],
      ) => void,
  ): this

  Removes a listener for the specified event.

  Type Parameters

  • K extends "draw" | "update"

    Event name

  Parameters

  • event: K

    The name of the event

  • listener: (...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K]) => void

    The callback to remove

  Returns this

  This emitter for chaining

emit

• emit<K extends "draw" | "update">(
      event: K,
      ...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K],
  ): boolean

  Emits an event, invoking all registered listeners with the provided arguments.

  If the event is "error" and no listeners are registered, the first argument (the error) will be thrown.

  Type Parameters

  • K extends "draw" | "update"

    Event name

  Parameters

  • event: K

    The name of the event to emit

  • ...args: { update: [number]; draw: [CanvasRenderingContext2D] }[K]

    Arguments to pass to listeners

  Returns boolean

  true if any listeners were invoked, false otherwise

removeAllListeners

• removeAllListeners<K extends "draw" | "update">(event?: K): LeaSceneII

  Removes all listeners for the specified event, or all listeners if no event is provided.

  Type Parameters

  • K extends "draw" | "update"

    Event name

  Parameters

  • Optionalevent: K

    Optional event name to clear listeners for

  Returns LeaSceneII

  This emitter for chaining

listenerCount

• listenerCount<K extends "draw" | "update">(event: K): number

  Returns the number of listeners registered for the specified event.

  Type Parameters

  • K extends "draw" | "update"

    Event name

  Parameters

  • event: K

    The event to count listeners for

  Returns number

  The number of registered listeners