import type { WithNormalizedProps } from "../../global";
export declare const messageDurationStandard = 1500;
export declare const messageDurationReducedMotionMultiplier = 1.5;
export declare const messageFadeInDuration = 833;
interface Message {
    renderBody: Marko.Body;
    duration?: number;
}
interface ProgressBarExpressiveInput extends Omit<Marko.HTML.Div, `on${string}`> {
    "a11y-text"?: Marko.HTMLAttributes["aria-label"];
    message?: Marko.AttrTag<Message>;
    size?: "medium" | "large";
}
export interface Input extends WithNormalizedProps<ProgressBarExpressiveInput> {
}
interface State {
    isInitialMessage: boolean;
    messageIsFadingIn: boolean;
    currentMessageIndex: number;
    nextMessageIndex: number;
}
declare class ProgressBarExpressive extends Marko.Component<Input, State> {
    timeouts: {
        fadeIn?: NodeJS.Timeout;
        showMessage?: NodeJS.Timeout | number;
    };
    fadeInFirstMessage: boolean;
    onCreate(input: Input): void;
    onInput(input: Input): void;
    onDestroy(): void;
    clearTimeouts(): void;
    initializeMessageRotation(messages?: Marko.AttrTag<Message>): void;
    /**
     * Determine how long a message should display.
     * Displays longer when user prefers reduced motion.
     * @returns time in milliseconds
     */
    getMessageDuration(message?: Message): number;
    /**
     * Animate in a message, queuing up the next one
     */
    fadeInMessage(): void;
    /**
     * Display a message and queue the next one
     */
    showMessage(messageTags?: Marko.AttrTag<Message> | undefined, extraDelay?: number): void;
}
export default ProgressBarExpressive;