From 0cbbbaead06b4fa845ab35605250ab563273bd3e Mon Sep 17 00:00:00 2001
From: Matthias Kunnen <matthias.kunnen@gmail.com>
Date: Wed, 13 Feb 2019 21:53:33 +0100
Subject: [PATCH] fix(throttleTime): fix single value with leading disabled,
 trailing enabled

Emit single value with leading disabled, trailing enabled.

Closes #2859 and #4491.
---
 src/internal/operators/throttleTime.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/internal/operators/throttleTime.ts b/src/internal/operators/throttleTime.ts
index b5da87585c..5da1540c79 100644
--- a/src/internal/operators/throttleTime.ts
+++ b/src/internal/operators/throttleTime.ts
@@ -101,6 +101,9 @@ class ThrottleTimeSubscriber<T> extends Subscriber<T> {
       this.add(this.throttled = this.scheduler.schedule<DispatchArg<T>>(dispatchNext, this.duration, { subscriber: this }));
       if (this.leading) {
         this.destination.next(value);
+      } else if (this.trailing) {
+        this._trailingValue = value;
+        this._hasTrailingValue = true;
       }
     }
   }