/**
 * Returns `false` for one painted frame, then `true`.
 *
 * Bars render at zero size while this is `false` and at their real size once it
 * flips, so a CSS transition on `width`/`height` plays the grow-in that the
 * OttoRouter dashboard gets from Recharts' `animationDuration`. Changing
 * `resetKey` (metric, sort, range…) replays it.
 */
export declare function useGrow(resetKey?: string | number): boolean;
/** Matches the 650ms ease-out Recharts uses in the OttoRouter dashboard. */
export declare const GROW_MS = 650;
export declare const GROW_TRANSITION = "cubic-bezier(0.16, 1, 0.3, 1)";
/**
 * Per-item entry delay in milliseconds, capped so a long series still finishes
 * promptly instead of trickling in for several seconds.
 */
export declare function growDelay(index: number, total: number): number;
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