/**
 * @license
 * Copyright 2021 Google LLC
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { type HTMLProcessingParser } from '../html_processor.js';
/**
 * Base BudouX Web component.
 */
export declare abstract class BudouXBaseElement extends HTMLElement {
    abstract parser: HTMLProcessingParser;
    observer: MutationObserver;
    /**
     * Base BudouX Web component constructor.
     */
    constructor();
    connectedCallback(): void;
    attributeChangedCallback(): void;
    sync(): void;
}