/**
 * Observes document `dir` changes and updates `pageIsRTL` on hosts.
 * @param {typeof import('../core/CustomElement.js').default} Base
 */
export default function RTLObserverMixin(Base: typeof import("../core/CustomElement.js").default): typeof import("../core/CustomElement.js").default & import("../core/CustomElement.js").Class<{
    pageIsRTL: boolean;
}, any[]>;
//# sourceMappingURL=RTLObserverMixin.d.ts.map