Clean up nodes observer before adding new ones for gr-diff

taoalpha · taoalpha · commit eb0423659f48 · 2020-04-21T10:40:42.000Z
Change-Id: I64ee29ffc3e5b563512109f5bd737bcf0dc01605
diff --git a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.js b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.js
@@ -856,6 +856,7 @@ class GrDiff extends mixinBehaviors( [
   }
 
   _handleRenderContent() {
+    this._unobserveIncrementalNodes();
     this._incrementalNodeObserver = dom(this).observeNodes(info => {
       const addedThreadEls = info.addedNodes.filter(isThreadEl);
       // Removed nodes do not need to be handled because all this code does is

Original file line number	Diff line number	Diff line change
`@@ -856,6 +856,7 @@ class GrDiff extends mixinBehaviors( [`
`856`	`856`	`}`
`857`	`857`
`858`	`858`	`_handleRenderContent() {`
	`859`	`+ this._unobserveIncrementalNodes();`
`859`	`860`	`this._incrementalNodeObserver = dom(this).observeNodes(info => {`
`860`	`861`	`const addedThreadEls = info.addedNodes.filter(isThreadEl);`
`861`	`862`	`// Removed nodes do not need to be handled because all this code does is`