fix

Author: xsalonx

lib/public/components/common/popover/overflowBalloon.js

@@ -53,7 +53,7 @@ export const overflowBalloon = (content, options = null) => {
              */
             onTriggerNodeChange: function (previousTriggerNode, newTriggerNode) {
                 if (previousTriggerNode) {
-                    previousTriggerNode.removeEventListener('mouseover', this.prevousNodeMouseoverCallback);
+                    previousTriggerNode.removeEventListener('mouseover', this.previousNodeMouseoverCallback);
                     previousTriggerNode.removeEventListener('mouseleave', this.hidePopover);
                 }
 
@@ -75,15 +75,15 @@ export const overflowBalloon = (content, options = null) => {
                         this.showPopover();
                         const selector = `.popover[data-popover-key="${key}"]`;
                         const contentNode = document.querySelector(selector);
-
-                        contentNode.removeEventListener('mouseover', contentNodeMouseoverCallback);
-                        contentNode.removeEventListener('mouseleave', contentNodeMousleaveCallback);
-
-                        contentNode.addEventListener('mouseover', contentNodeMouseoverCallback);
-                        contentNode.addEventListener('mouseleave', contentNodeMousleaveCallback);
+                        if (contentNode) {
+                            contentNode.removeEventListener('mouseover', contentNodeMouseoverCallback);
+                            contentNode.removeEventListener('mouseleave', contentNodeMousleaveCallback);
+                            contentNode.addEventListener('mouseover', contentNodeMouseoverCallback);
+                            contentNode.addEventListener('mouseleave', contentNodeMousleaveCallback);
+                        }
                     };
 
-                    this.prevousNodeMouseoverCallback = newNodeMouseoverCallback;
+                    this.previousNodeMouseoverCallback = newNodeMouseoverCallback;
 
                     node.addEventListener('mouseover', newNodeMouseoverCallback);
                     node.addEventListener('mouseleave', this.hidePopover);