type Options = {
    str: string;
    speed?: number;
    placeholderChar?: string;
    frameOffset?: number;
    charOffset?: number;
    charStep?: number;
    minCharCode?: number;
    maxCharCode?: number;
    onProgress?: (arg0: string) => void;
    onComplete?: (arg0: string) => void;
};
declare class RandomText {
    static defaults: Options;
    str: string;
    speed: number;
    placeholderChar: string;
    frameOffset: number;
    charOffset: number;
    charStep: number;
    minCharCode: number;
    maxCharCode: number;
    onProgress: (...args: Array<string>) => string;
    onComplete: (...args: Array<string>) => string;
    rafId: number;
    constructor(options: Options);
    start: () => void;
    stop(): void;
    step(randoms: number[], stepCount: number, speed: number): void;
}
export default RandomText;