Function releasePointerEvent

packages/melonjs/src/input/pointerevent.ts:764–801

(
	eventType: string,
	region: any,
	callback?: (pointer: Pointer) => boolean | void,
)

 * me.input.releasePointerEvent('pointerdown', this);
 */
export function releasePointerEvent(
	eventType: string,
	region: any,
	callback?: (pointer: Pointer) => boolean | void,
): void {
	if (pointerEventList.indexOf(eventType) === -1) {
		throw new Error(`invalid event type : ${eventType}`);
	}

	// convert to supported event type if pointerEvent not natively supported
	const eventTypes = findAllActiveEvents(
		activeEventList,
		pointerEventMap[eventType],
	);

	const handlers = eventHandlers.get(region);
	if (typeof handlers !== "undefined") {
		for (let i = 0; i < eventTypes.length; i++) {
			const eventType = eventTypes[i];
			if (handlers.callbacks[eventType]) {
				if (typeof callback !== "undefined") {
					remove(handlers.callbacks[eventType], callback);
				} else {
					while (handlers.callbacks[eventType].length > 0) {
						handlers.callbacks[eventType].pop();
					}
				}
				// free the array if empty
				if (handlers.callbacks[eventType].length === 0) {
					delete handlers.callbacks[eventType];
				}
			}
		}
		if (Object.keys(handlers.callbacks).length === 0) {
			eventHandlers.delete(region);
		}
	}
}

/**
 * allows the removal of all registered event listeners from the object target.