export function useEventListener()

in src/hooks/useEventListener.ts [31:73]

• 39 lines of code
• 7 McCabe index (conditional complexity)

export function useEventListener({
  el = window,
  name,
  listener,
  options,
  autoRemove = true,
  isDebounce = true,
  wait = 80,
}: UseEventParams): { removeEvent: RemoveEventFn } {
  let remove: RemoveEventFn = () => ({});
  const isAddRef = ref(false);

  if (el) {
    const element = ref(el as Element) as Ref<Element>;

    const handler = isDebounce ? useDebounceFn(listener, wait) : useThrottleFn(listener, wait);
    const realHandler = wait ? handler : listener;
    const removeEventListener = (e: Element) => {
      isAddRef.value = true;
      e.removeEventListener(name, realHandler, options);
    };
    const addEventListener = (e: Element) => e.addEventListener(name, realHandler, options);

    const removeWatch = watch(
      element,
      (v, _ov, cleanUp) => {
        if (v) {
          !unref(isAddRef) && addEventListener(v);
          cleanUp(() => {
            autoRemove && removeEventListener(v);
          });
        }
      },
      { immediate: true },
    );

    remove = () => {
      removeEventListener(element.value);
      removeWatch();
    };
  }
  return { removeEvent: remove };
}