import { PropertyValues } from 'lit';
import { SpectrumElement } from '../../element/index.js';
import { ICON_VALID_SIZES } from './Icon.types.js';
declare const IconBase_base: typeof SpectrumElement & {
    new (...args: any[]): import('../../mixins/index.js').SizedElementInterface;
    prototype: import('../../mixins/index.js').SizedElementInterface;
} & import('../../mixins/index.js').SizedElementConstructor;
/**
 * Shared behavior for icon elements: the `size` scale, the `accessibleLabel`, and
 * host-owned accessibility. Concrete elements own their own `render()` and styles;
 * this base carries no template and no CSS.
 *
 * The host owns semantics: when `accessibleLabel` is set the host is exposed as an
 * image (`role="img"` with that label); when empty (the default) the host is marked
 * `aria-hidden` and the icon is decorative. The rendered or slotted SVG is never
 * given its own role, avoiding double-announcement.
 *
 * @attribute {string} accessible-label - Accessible label for the icon.
 * @attribute {string} size - T-shirt icon size.
 */
export declare abstract class IconBase extends IconBase_base {
    /**
     * T-shirt icon size.
     *
     * @default m
     */
    size: (typeof ICON_VALID_SIZES)[number];
    /**
     * Accessible label for the icon. When empty the icon is decorative.
     */
    accessibleLabel: string;
    protected firstUpdated(changedProperties: PropertyValues): void;
    protected updated(changedProperties: PropertyValues): void;
    private updateHostAccessibility;
}
export {};