1  /* eslint-disable import/prefer-default-export */
 2  
 3  /**
 4   * @name debounce
 5   * @description
 6   * Creates a debounced function that delays invoking func until
 7   * after delayMs milliseconds have elapsed since the last time the
 8   * debounced function was invoked.
 9   *
10   * @param delayMs - delay in milliseconds
11   * @param immediate - Specify invoking on the leading edge of the timeout
12   * (Defaults to trailing)
13   *
14   *(f: F): (...args: Parameters<F>) => void
15   */
16  export function debounce<F extends (...args: any[]) => any>(
17      fn: F,
18      delayMs: number,
19      immediate = false,
20  ): (...args: Parameters<F>) => void {
21      let timerId;
22  
23      return function debounced(...args) {
24          const shouldCallNow = immediate && !timerId;
25          clearTimeout(timerId);
26  
27          if (shouldCallNow) {
28              fn.apply(this, args);
29          }
30  
31          timerId = setTimeout(() => {
32              timerId = null;
33              if (!immediate) {
34                  fn.apply(this, args);
35              }
36          }, delayMs);
37      };
38  }
39  
40  export const DEFAULT_MOUSE_OVER_DELAY = 300;