import Looper = require('./Looper');
/**
 * Looper based on the HTML-5 RequestAnimationFrame API.
 *
 * This looper has the property that it will not be called if the browser page is hidden in some way, since it gets
 * executed before each redraw of the page.
 */
declare class RequestAnimationFrame implements Looper.Looper {
    private cb;
    private handle;
    /**
     * Create a RAF-based Looper that will invoke the given callback.
     *
     * If the callback returns false, the Looper will cancel any future invocations.
     *
     * @param {Function} cb callback that will be invoked by this looper.
     */
    constructor(cb: () => boolean);
    start(): void;
    stop(): void;
    isRunning(): boolean;
    /**
     * Determines whether the current environment supports update loops based on frame refreshes.
     *
     * If this method returns false, the RequestAnimationFrame-based Looper will fail to work.
     */
    static isAvailable(): boolean;
}
export = RequestAnimationFrame;