/**
 * Creates a computed reference that uses a provide getter function called with an argument representing the current mount state of the component.
 * @param getter A getter function that will run with `mounted` argument representing whether or not the component is mounted.
 * @returns A computed reference that changes when component becomes mounted or unmounted.
 */
export function useMountedValue<T>(getter: (isMounted: boolean) => T) {
	const mounted = ref(getCurrentInstance()?.isMounted ?? false)

	onMounted(() => (mounted.value = true))

	onUnmounted(() => (mounted.value = false))

	return computed(() => getter(mounted.value))
}