export declare const TEXT_REVEAL: Readonly<{
    MIN_CHARS_PER_SECOND: 120;
    MAX_CHARS_PER_SECOND: 1400;
    DEFAULT_CHARS_PER_SECOND: 320;
    CATCHUP_FACTOR: 1.15;
    MAX_LAG_MS: 700;
    FINISH_MS: 420;
    FINISH_MIN_REMAINING_MS: 16;
    ARRIVAL_SAMPLE_MS: 120;
    ARRIVAL_SMOOTHING: 0.3;
    MAX_QUEUE_CHARS: 4000;
    MAX_FRAME_DELTA_MS: 64;
    MS_PER_SECOND: 1000;
    SURROGATE_HIGH_START: 55296;
    SURROGATE_HIGH_END: 56319;
    REDUCED_MOTION_QUERY: "(prefers-reduced-motion: reduce)";
}>;
export type TextRevealPacer = {
    enqueue(text: string): void;
    finish(): void;
    flush(): void;
    destroy(): void;
    hasPending(): boolean;
};
export type TextRevealPacerOptions = {
    appendText: (chunk: string) => void;
    onIdle?: () => void;
    now?: () => number;
    schedule?: (callback: () => void) => number;
    cancel?: (handle: number) => void;
    disabled?: boolean;
};
export declare function createTextRevealPacer(options: TextRevealPacerOptions): TextRevealPacer;