import { CustomElement } from '../../Abstracts/CustomElement';
import { IPlaceholderElementProps } from './IPlaceholderElementProps';
declare const PlaceholderElement_base: (abstract new (...args: Array<any>) => import("../../../Behaviors/Themeable").IThemeableProps) & (abstract new (...args: Array<any>) => import("../../../Behaviors/Dimensionable").IDimensionableProps) & typeof CustomElement & import("../../../Behaviors/Themeable").IThemeableCtor;
/**
 * Placeholder - A dimensional container for empty states, drag targets, and layout reservations.
 *
 * @description
 * The Placeholder component creates a styled container that represents empty content areas or reserved
 * layout space. It's commonly used for drag-and-drop drop zones, empty state displays, image upload
 * areas, and maintaining layout structure before content loads. The component supports custom dimensions
 * and provides visual cues through dashed borders and semi-transparent backgrounds to indicate
 * interactive or placeholder regions.
 *
 * @name Placeholder
 * @element mosaik-placeholder
 * @category Primitives
 *
 * @slot - The default content slot for placeholder content (text, icons, or instructions)
 *
 * @cssprop {String} --placeholder-background-color - Background color of the placeholder area
 * @cssprop {String} --placeholder-border-color - Border color of the placeholder outline
 * @cssprop {String} --placeholder-border-radius - Corner rounding radius
 * @cssprop {String} --placeholder-border-style - Border line style (typically dashed)
 * @cssprop {String} --placeholder-border-width - Border thickness
 * @cssprop {String} --placeholder-font-family - Font family for placeholder text
 * @cssprop {String} --placeholder-font-letter-spacing - Letter spacing for placeholder text
 * @cssprop {String} --placeholder-font-line-height - Line height for placeholder text
 * @cssprop {String} --placeholder-font-size - Font size for placeholder text
 * @cssprop {String} --placeholder-font-text-decoration - Text decoration style
 * @cssprop {String} --placeholder-font-text-transform - Text transformation style
 * @cssprop {String} --placeholder-font-weight - Font weight for placeholder text
 * @cssprop {String} --placeholder-gap - Spacing between placeholder content elements
 * @cssprop {String} --placeholder-padding-bottom - Bottom padding inside the placeholder
 * @cssprop {String} --placeholder-padding-left - Left padding inside the placeholder
 * @cssprop {String} --placeholder-padding-right - Right padding inside the placeholder
 * @cssprop {String} --placeholder-padding-top - Top padding inside the placeholder
 * @cssprop {String} --placeholder-shadow - The shadow CSS custom property.
 * @cssprop {String} --placeholder-shadow-blur - The shadow blur CSS custom property.
 * @cssprop {String} --placeholder-shadow-color - The shadow color CSS custom property.
 * @cssprop {String} --placeholder-shadow-offset-x - The shadow offset x CSS custom property.
 * @cssprop {String} --placeholder-shadow-offset-y - The shadow offset y CSS custom property.
 * @cssprop {String} --placeholder-shadow-spread - The shadow spread CSS custom property.
 * @cssprop {String} --placeholder-transition-duration - Duration of visual transitions
 * @cssprop {String} --placeholder-transition-mode - Timing function for transitions
 * @cssprop {String} --placeholder-transition-property - CSS properties to transition
 * @cssprop {String} --placeholder-translate - Transform translation value
 *
 * @example
 * Basic placeholder with dimensions:
 * ```html
 * <mosaik-placeholder width="300px" height="200px"></mosaik-placeholder>
 * ```
 *
 * @example
 * Image upload placeholder:
 * ```html
 * <mosaik-placeholder width="400px" height="300px">
 *   <p>Drag image here or click to upload</p>
 * </mosaik-placeholder>
 * ```
 *
 * @example
 * Drag-and-drop target:
 * ```html
 * <mosaik-placeholder id="dropZone" width="100%" height="150px">
 *   <p>Drop files here</p>
 * </mosaik-placeholder>
 * <script>
 *   const dropZone = document.querySelector('#dropZone');
 *   dropZone.addEventListener('dragover', (e) => {
 *     e.preventDefault();
 *     dropZone.style.borderStyle = 'solid';
 *   });
 *   dropZone.addEventListener('drop', (e) => {
 *     e.preventDefault();
 *     // Handle file drop
 *   });
 * </script>
 * ```
 *
 * @public
 */
export declare class PlaceholderElement extends PlaceholderElement_base implements IPlaceholderElementProps {
    /**
     * @public
     */
    constructor();
    /**
     * Returns the `is` property.
     * The `is` property represents natural name of this element.
     *
     * @public
     * @static
     * @readonly
     */
    static get is(): string;
}
/**
 * @public
 */
export declare namespace PlaceholderElement {
    type Props = IPlaceholderElementProps;
}
/**
 * @public
 */
declare global {
    interface HTMLElementTagNameMap {
        'mosaik-placeholder': PlaceholderElement;
    }
}
export {};
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