import { WebGLRenderer, XRSession, XRSessionInit } from "three";
export declare const xr: import("three").XR | undefined;
export declare let hasXR: boolean;
export declare let xrSession: XRSession | undefined;
export declare const xrEnabled: () => boolean;
export declare const startXR: (renderer: WebGLRenderer, overlay?: HTMLElement | null) => Promise<void>;
export declare const stopXR: () => void;
interface XRDOMOverlayInit {
    root: Element;
}
export interface _XRSessionInit extends XRSessionInit {
    domOverlay?: XRDOMOverlayInit | undefined;
}
export {};