import { ESLMediaRuleList } from '../../esl-media-query/core';
import { ESLMixinElement } from '../../esl-mixin-element/core';
/**
 * ESLLineClampAlt mixin element
 * @author Feoktyst Shovchko
 *
 * ESLLineClampAlt is a custom attribute designed to work complementary to {@link ESLLineClamp}
 * Its purpose is to provide alternative line clamp values that can be toggled,
 * allowing to switch between the regular clamp configuration and an alternative one.
 */
export declare class ESLLineClampAlt extends ESLMixinElement {
    static is: string;
    /** Media query to activate alternate clamping with number of lines */
    lines: string;
    /** CSS variable to set alternate line clamp value */
    ALT_LINE_CLAMP_VAR: string;
    /** Media conditions tuple string (uses '|' as separator), to be used in case of tuple syntax */
    mask: string;
    /** @returns parsed media rule list for line clamping configuration */
    get linesQuery(): ESLMediaRuleList<string>;
    protected connectedCallback(): void;
    protected attributeChangedCallback(): void;
    protected updateLines(): void;
    protected onQueryChange(): void;
}