import { ESLBaseElement } from '../../esl-base-element/core';
import type { ESLToggleable } from '../../esl-toggleable/core';
export declare class ESLToggleablePlaceholder extends ESLBaseElement {
    static is: string;
    /** List of attributes allowed to copy from origin to this element */
    static readonly allowedAttrs: string[];
    $origin: ESLToggleable | null;
    /** Сreates a placeholder for a given element of the toggleable's descendant */
    static from<T extends typeof ESLToggleablePlaceholder>(this: T, $el: ESLToggleable): InstanceType<T>;
    connectedCallback(): void;
    /** Builds attribute name for copy */
    protected buildAttrName(name: string): string;
    /** Copies allowed attributes from origin to this element */
    protected copyAttributesFromOrigin(): void;
}
declare global {
    export interface ESLLibrary {
        ToggleablePlaceholder: typeof ESLToggleablePlaceholder;
    }
    export interface HTMLElementTagNameMap {
        'esl-toggleable-placeholder': ESLToggleablePlaceholder;
    }
}