react#UIEvent TypeScript Examples

The following examples show how to use react#UIEvent. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: ListViewport.tsx    From flood with GNU General Public License v3.0 5 votes vote down vote up 
Overflow = forwardRef<HTMLDivElement, ComponentProps<'div'>>((props: ComponentProps<'div'>, ref) => {
  const {children, className, onScroll} = props;
  const osRef = useRef<OverlayScrollbarsComponent>(null);

  useEffect(() => {
    const scrollbarRef = osRef.current;

    if (scrollbarRef == null) {
      return () => {
        // do nothing.
      };
    }

    const viewport = scrollbarRef.osInstance()?.getElements().viewport as HTMLDivElement;

    const refCallback = ref as RefCallback<HTMLDivElement>;
    refCallback(viewport);

    if (onScroll) {
      viewport.addEventListener('scroll', (e) => onScroll(e as unknown as UIEvent<HTMLDivElement>), {
        passive: true,
      });
    }

    return () => {
      if (onScroll) {
        viewport.removeEventListener('scroll', (e) => onScroll(e as unknown as UIEvent<HTMLDivElement>));
      }
    };
  }, [onScroll, ref]);

  return (
    <OverlayScrollbarsComponent
      {...props}
      options={{
        scrollbars: {autoHide: 'leave', clickScrolling: true},
        className,
      }}
      ref={osRef}
    >
      {children}
    </OverlayScrollbarsComponent>
  );
})