From 0c50c7e99f7e89a804f7e7479d6c4d26d37bdbfa Mon Sep 17 00:00:00 2001
From: kyle <shockey@users.noreply.github.com>
Date: Fri, 20 Apr 2018 16:34:22 -0700
Subject: [PATCH] enhancement: don't block scrolling if HighlightCode is not
 scrollable (#4463)

---
 src/core/components/highlight-code.jsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/components/highlight-code.jsx b/src/core/components/highlight-code.jsx
index 22ed061e..bbdda2d0 100644
--- a/src/core/components/highlight-code.jsx
+++ b/src/core/components/highlight-code.jsx
@@ -36,10 +36,11 @@ export default class HighlightCode extends Component {
 
     const scrollOffset = visibleHeight + scrollTop
 
+    const isElementScrollable = contentHeight > visibleHeight
     const isScrollingPastTop = scrollTop === 0 && deltaY < 0
     const isScrollingPastBottom = scrollOffset >= contentHeight && deltaY > 0
 
-    if (isScrollingPastTop || isScrollingPastBottom) {
+    if (isElementScrollable && (isScrollingPastTop || isScrollingPastBottom)) {
       e.preventDefault()
     }
   }