type TextTransitionOptions = {
    fromText: string;
    targetText: string;
    onUpdate: (value: string) => void;
    onComplete?: () => void;
    random?: () => number;
};
type TextTransitionController = {
    stop: () => void;
};
type TextTransitionTimeline = {
    sourceLength: number;
    targetLength: number;
    maxLength: number;
    lastSourceRandomizeStartMs: number;
    lastRandomizeStartMs: number;
    collapseStartMs: number;
    totalDurationMs: number;
};
export declare const TEXT_TRANSITION_RANDOMIZE_START_STAGGER_MS = 5;
export declare const TEXT_TRANSITION_EXPAND_STAGGER_MS = 5;
export declare const TEXT_TRANSITION_POST_RANDOMIZE_HOLD_MS = 10;
export declare const TEXT_TRANSITION_COLLAPSE_STAGGER_MS = 10;
export declare const TEXT_TRANSITION_REFRESH_MS = 16;
export declare const getTextTransitionRandomizeStartMs: (index: number, sourceLength: number, targetLength: number) => number | null;
export declare const getTextTransitionTimeline: (fromText: string, targetText: string) => TextTransitionTimeline;
export declare const getTextTransitionCharset: (character: string) => "abcdefghijklmnopqrstuvwxyz" | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | "0123456789" | "#%&^+=-" | null;
export declare const getRandomTransitionCharacter: (character: string, random?: () => number) => string;
export declare const buildTextTransitionFrame: (fromText: string, targetText: string, elapsedMs: number, random?: () => number) => string;
export declare const runTextTransition: ({ fromText, targetText, onUpdate, onComplete, random, }: TextTransitionOptions) => TextTransitionController;
export type { TextTransitionController, TextTransitionOptions, TextTransitionTimeline, };
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