From aee2827af3eb3b75297632d8a3d4d4c9218c3b2a Mon Sep 17 00:00:00 2001
From: mertsincan <sincan.mert@gmail.com>
Date: Fri, 26 Apr 2019 14:46:19 +0300
Subject: [PATCH] Fixed #868 - Flipped OverlayPanel rendered behind browser

---
 src/components/utils/DomHandler.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/components/utils/DomHandler.js b/src/components/utils/DomHandler.js
index 354eef3917..3f499cd245 100644
--- a/src/components/utils/DomHandler.js
+++ b/src/components/utils/DomHandler.js
@@ -187,13 +187,18 @@ export default class DomHandler {
         let viewport = this.getViewport();
         let top, left;
 
-        if (targetOffset.top + targetOuterHeight + elementOuterHeight > viewport.height)
+        if (targetOffset.top + targetOuterHeight + elementOuterHeight > viewport.height) {
             top = targetOffset.top + windowScrollTop - elementOuterHeight;
-        else
+            if(top < 0) {
+                top = 0 + windowScrollTop;
+            }
+        } 
+        else {
             top = targetOuterHeight + targetOffset.top + windowScrollTop;
+        }
 
         if (targetOffset.left + targetOuterWidth + elementOuterWidth > viewport.width)
-            left = targetOffset.left + windowScrollLeft + targetOuterWidth - elementOuterWidth;
+            left = Math.max(0, targetOffset.left + windowScrollLeft + targetOuterWidth - elementOuterWidth);
         else
             left = targetOffset.left + windowScrollLeft;