import { KeyboardPeripheral } from "@readium/navigator-html-injectables";
export declare class KeyboardConditionBridge {
    private config;
    private onUpdate;
    private unsubs;
    private conditionValues;
    constructor(config: KeyboardPeripheral[], onUpdate: (serializable: KeyboardPeripheral[]) => void);
    setup(): void;
    private buildSerializable;
    destroy(): void;
}