From 6ad829fa90af199150b11ba1d3c944b648a39ce5 Mon Sep 17 00:00:00 2001
From: Christopher James Calo <chris.calo@gmail.com>
Date: Wed, 27 Sep 2017 10:43:46 -0400
Subject: [PATCH] Add pending() function to debounce and throttle to fix #3387
 (#3388)

---
 debounce.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/debounce.js b/debounce.js
index b70a38621..5e27275a6 100644
--- a/debounce.js
+++ b/debounce.js
@@ -51,6 +51,9 @@ import isObject from './isObject.js'
  *
  * // Cancel the trailing debounced invocation.
  * jQuery(window).on('popstate', debounced.cancel)
+ * 
+ * // Check for pending invocations.
+ * const status = debounced.pending() ? "Pending…" : "Ready"
  */
 function debounce(func, wait, options) {
   let lastArgs,
@@ -148,6 +151,10 @@ function debounce(func, wait, options) {
   function flush() {
     return timerId === undefined ? result : trailingEdge(Date.now())
   }
+  
+  function pending() {
+    return timerId !== undefined
+  }
 
   function debounced(...args) {
     const time = Date.now()
@@ -174,6 +181,7 @@ function debounce(func, wait, options) {
   }
   debounced.cancel = cancel
   debounced.flush = flush
+  debounced.pending = pending
   return debounced
 }