index.d.ts

// typescript 

declare type Listener = (...args: any[]) => void;
declare type Callback = () => void;

/**
 * In the debouncing technique, no matter how many times the user fires the 
 * event, the attached function will be executed only after the specified 
 * time once the user stops firing the event.
 * 
 * Returns a function, that, as long as it continues to be invoked, will not
 * be triggered. The function will be called after it stops being called for
 * N milliseconds.
 * @param {!Function} func The function to execute.
 * @param {number=} timeout The timeout in milliseconds.
 * @return {!Function} Returns a function, that, as long as it continues 
 *     to be invoked, will not be triggered.
 */
export declare function debounce(func: Callback, timeout?: number): Listener;

/**
 * Throttling is a technique in which, no matter how many times the user 
 * fires the event, the attached function will be executed only once in a 
 * given time interval.
 * 
 * Returns a function, that, as long as it continues to be invoked, will only
 * trigger every N milliseconds.
 * @param {!Function} func The function to execute.
 * @param {number=} timeout The timeout in milliseconds.
 * @return {!Function} Returns a function, that, as long as it continues 
 *     to be invoked, will only trigger every N milliseconds.
 */
export declare function throttle(func: Callback, timeout?: number): Listener;