import { AttributeReactiveClass } from '@lynx-dev/web-elements-reactive';
import { XTextarea } from './XTextarea.js';
export declare class Placeholder implements InstanceType<AttributeReactiveClass<typeof XTextarea>> {
    #private;
    static observedAttributes: readonly ["placeholder", "placeholder-color", "placeholder-font-size", "placeholder-font-weight", "placeholder-font-family"];
    constructor(dom: HTMLElement);
}