From 661aaead35ed1363596ee68243b5f6b9a520532b Mon Sep 17 00:00:00 2001
From: Tyler Long <tyler4long@gmail.com>
Date: Thu, 8 Mar 2018 21:07:18 +0800
Subject: [PATCH] Fix a flowchat selection issue

---
 src/diagrams/flowchart/graphDb.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/diagrams/flowchart/graphDb.js b/src/diagrams/flowchart/graphDb.js
index d7aca4801..a9c950090 100644
--- a/src/diagrams/flowchart/graphDb.js
+++ b/src/diagrams/flowchart/graphDb.js
@@ -248,7 +248,7 @@ export const getClasses = function () {
 
 const setupToolTips = function (element) {
   let tooltipElem = d3.select('.mermaidTooltip')
-  if (tooltipElem[0][0] === null) {
+  if ((tooltipElem._groups || tooltipElem)[0][0] === null) {
     tooltipElem = d3.select('body')
       .append('div')
       .attr('class', 'mermaidTooltip')