From 1bc0f5e86f80d429a09c8e1acf4f85e8625a2b4c Mon Sep 17 00:00:00 2001
From: Chuong <kocoten1992@users.noreply.github.com>
Date: Sun, 3 Dec 2017 01:54:02 +0700
Subject: [PATCH] fix can not drag on drag-bar

fix #4773
---
 src/js/utils/dom.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/js/utils/dom.js b/src/js/utils/dom.js
index 71cb2a5c0b..2bcdb7727f 100644
--- a/src/js/utils/dom.js
+++ b/src/js/utils/dom.js
@@ -8,6 +8,7 @@ import log from './log.js';
 import tsml from 'tsml';
 import {isObject} from './obj';
 import computedStyle from './computed-style';
+import * as browser from './browser';
 
 /**
  * Detect if a value is a string with any non-whitespace characters.
@@ -782,6 +783,12 @@ export function isSingleLeftClick(event) {
     return true;
   }
 
+  if (browser.IE_VERSION === 9) {
+    // Ignore IE9
+
+    return true;
+  }
+
   if (event.button !== 0 || event.buttons !== 1) {
     // This is the reason we have those if else block above
     // if any special case we can catch and let it slide