Function fn

website/src/components/FlowchartSVG.tsx:269–274

(e: WheelEvent)

    const el = svgRef.current;
    if (!el) return;
    const fn = (e: WheelEvent) => {
      e.preventDefault();
      setZoom((z) =>
        Math.min(4, Math.max(0.04, z * (e.deltaY > 0 ? 0.92 : 1.08))),
      );
    };
    el.addEventListener("wheel", fn, { passive: false });
    return () => el.removeEventListener("wheel", fn);
  }, []);