/**
 * @class Interval
 */
declare class Interval {
    #private;
    /**
     * Creates and returns a new Interval instance for the given function and delay in milliseconds.
     */
    static create(func: Function, delay: number): Interval;
    /**
     * Number of milliseconds that function should wait before next call.
     *
     * @type {number}
     */
    delay: number;
    /**
     * Initializes the interval with a callback function and a delay in milliseconds, binding the internal RAF callback.
     */
    constructor(func: Function, delay: number);
    /**
     * Start loop.
     *
     * @returns {Interval}
     */
    start(): this;
    /**
     * Stop looping.
     *
     * @returns {Interval}
     */
    stop(): this;
}
export default Interval;
/**
 * Convert delay from string format to milliseconds.
 *
 * @param {number|string} delay The delay in FPS (frame per second) or number format.
 * @returns {number}
 */
export declare function parseDelay(delay: number): number;