Function tick

demo/App.tsx:277–283

()

    }
    let raf = 0;
    const tick = () => {
      const el = msgsRef.current;
      if (el && !userScrolledUpRef.current) {
        easeScrollToBottom(el, DEFAULT_STREAM_SCROLL_EASE);
      }
      raf = requestAnimationFrame(tick);
    };
    raf = requestAnimationFrame(tick);
    return () => cancelAnimationFrame(raf);
  }, [busy]);