Function getZoomOptionsConfig

src/core/createRenderCoordinator.ts:2533–2545

(
    opts: ResolvedChartGPUOptions
  )

  };

  const getZoomOptionsConfig = (
    opts: ResolvedChartGPUOptions
  ): { readonly start: number; readonly end: number; readonly hasInside: boolean } | null => {
    // Zoom is enabled when *either* inside or slider exists. A single shared percent-space
    // window is used for both.
    const insideCfg = opts.dataZoom?.find((z) => z?.type === 'inside');
    const sliderCfg = opts.dataZoom?.find((z) => z?.type === 'slider');
    const cfg = insideCfg ?? sliderCfg;
    if (!cfg) return null;
    const start = Number.isFinite(cfg.start) ? cfg.start! : 0;
    const end = Number.isFinite(cfg.end) ? cfg.end! : 100;
    return { start, end, hasInside: !!insideCfg };
  };

  const clampPercent = (v: number): number => Math.min(100, Math.max(0, v));