import { ElementInternals } from "./element-internals.js";
import { CustomStateSet } from "./CustomStateSet.js";
import "./element-internals.js";
export * from "./types.js";
export { forceCustomStateSetPolyfill, forceElementInternalsPolyfill, } from "./element-internals.js";
declare global {
    interface Window {
        CustomStateSet: typeof CustomStateSet;
        ElementInternals: typeof ElementInternals;
        ShadyDOM: any;
    }
    interface HTMLElement {
        /**
         * Attaches an ElementInternals instance to a custom element. Calling this method
         * on a built-in element will throw an error.
         */
        attachInternals(): ElementInternals;
    }
}