import { CSSResultGroup } from "lit";
import { RenderResult } from "../nexus/parts/types.js";
export type BaseElement = HTMLElement & {
    connectedCallback(): void;
    disconnectedCallback(): void;
    requestUpdate(): void;
    readonly updateComplete: Promise<boolean>;
    render(): RenderResult;
};
export type BaseElementClass = {
    new (...args: any[]): BaseElement;
    readonly styles?: CSSResultGroup;
};
export type HTMLElementClasses = {
    [key: string]: {
        new (...args: any[]): HTMLElement;
    };
};
export type BaseElementClasses = {
    [key: string]: BaseElementClass;
};