import * as CDP from 'chrome-remote-interface';
/**
 * Defines a trigger that signifies page render completion.
 *
 * @export
 * @abstract
 * @class CompletionTrigger
 */
export declare abstract class CompletionTrigger {
    protected timeout: number;
    protected timeoutMessage: string;
    /**
     * Creates an instance of CompletionTrigger.
     * @param {number} [timeout=1000] milliseconds until timing out.
     * @param {string} [timeoutMessage='CompletionTrigger timed out.'] The timeout message.
     * @memberof CompletionTrigger
     */
    constructor(timeout?: number, timeoutMessage?: string);
    /**
     * Optional hook to initialize the CompletionTrigger before navigation.
     * @param {CDP.Client} _client the Chrome connection information.
     * @returns {Promise<void>} resolves if initialized, rejects on error.
     * @memberof CompletionTrigger
     */
    init(_client: CDP.Client): Promise<void>;
    /**
     * Abstracts away the trigger logic.
     *
     * @abstract
     * @param {CDP.Client} client the Chrome connection information.
     * @returns {Promise<any>} resolves if triggered, rejects on error or timeout.
     * @memberof CompletionTrigger
     */
    abstract wait(client: CDP.Client): Promise<any>;
}