import { IBehaviour, IRenderer } from '../api';
/**
 * IBehaviour implementation which listens for a keyup event with code 13 in order to publish
 * a text message to the outgoing text channel.
 */
export declare class KeyboardBehaviour extends IBehaviour {
    private readonly renderer;
    private readonly callback;
    constructor(renderer: IRenderer, target?: HTMLTextAreaElement, callback?: () => void);
    protected handler(ev: KeyboardEvent): void;
}