import { EventEmitter, OnDestroy } from "@angular/core";
/** A timer is a component for measuring time intervals */
export declare class TimerComponent implements OnDestroy {
    /** Element ID */
    id?: string;
    /** Element class name */
    className?: string;
    /** Timer's duration in seconds */
    get duration(): number;
    set duration(value: number);
    /** Callback when timer ends */
    timerEnd: EventEmitter<void>;
    minutes: number;
    seconds: number;
    private _timer;
    private _duration;
    private _countDown;
    /** Clears the timer */
    private clearTimer;
    /**
     * Converts the numeric value into two digits string for display purposes
     * @param {number} value The numberic value to be converted
     * @returns The two digits string value
     */
    toDoubleDigits(value: number): string;
    /** Kicks off the timer */
    startTimer(): void;
    ngOnDestroy(): void;
}