import { LitElement } from 'lit';
/**
 * @element nve-format-datetime
 * @description Formats a date/time value as localized text using the Intl.DateTimeFormat API. Renders inside a semantic time element.
 * Granular options (weekday, year, month, day, hour, minute, second) mirror the Intl.DateTimeFormat API. 'numeric' omits zero-padding, '2-digit' zero-pads.
 * @since 0.0.0
 * @entrypoint \@nvidia-elements/core/format-datetime
 * @slot - Date string to format (such as 2023-07-28T04:20:17.434Z). Serves as fallback before hydration.
 */
export declare class FormatDatetime extends LitElement {
    #private;
    static styles: import('lit').CSSResult[];
    static readonly metadata: {
        tag: string;
        version: string;
    };
    /**
     * Optional date string for values supplied by JavaScript or bound data.
     * By default, the component formats the element's text content, which also serves as the SSR fallback.
     * When both are present, this property takes precedence.
     */
    date?: string;
    /**
     * Language tag (such as en-US, de-DE). Defaults to document.documentElement.lang or browser default.
     */
    locale?: string;
    /**
     * Weekday representation: 'long' | 'short' | 'narrow'.
     */
    weekday?: 'long' | 'short' | 'narrow';
    /**
     * Year representation: 'numeric' | '2-digit'.
     */
    year?: 'numeric' | '2-digit';
    /**
     * Month representation: 'numeric' | '2-digit' | 'long' | 'short' | 'narrow'.
     */
    month?: 'numeric' | '2-digit' | 'long' | 'short' | 'narrow';
    /**
     * Day representation: 'numeric' | '2-digit'.
     */
    day?: 'numeric' | '2-digit';
    /**
     * Hour representation: 'numeric' | '2-digit'.
     */
    hour?: 'numeric' | '2-digit';
    /**
     * Minute representation: 'numeric' | '2-digit'.
     */
    minute?: 'numeric' | '2-digit';
    /**
     * Second representation: 'numeric' | '2-digit'.
     */
    second?: 'numeric' | '2-digit';
    /**
     * Preset date formatting style: 'full' | 'long' | 'medium' | 'short'.
     * Preset styles take precedence over granular date and time part options.
     */
    dateStyle?: 'full' | 'long' | 'medium' | 'short';
    /**
     * Preset time formatting style: 'full' | 'long' | 'medium' | 'short'.
     * Preset styles take precedence over granular date and time part options.
     */
    timeStyle?: 'full' | 'long' | 'medium' | 'short';
    /**
     * Time zone name display: 'long' | 'short'. Use it with granular options only; preset styles ignore it.
     */
    timeZoneName?: 'long' | 'short';
    /**
     * IANA time zone identifier (such as 'America/New_York', 'UTC').
     */
    timeZone?: string;
    render(): import('lit').TemplateResult<1>;
}