Improve comment.

Polymer · Mar 4, 2020 · d92ff92 · d92ff92
1 parent 91f01e5
commit d92ff92
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/lib/elements/dom-repeat.js b/lib/elements/dom-repeat.js
@@ -544,7 +544,10 @@ export class DomRepeat extends domRepeatBase {
     const limit = this.__calculateLimit(isntIdxToItemsIdx.length);
     // Create, update, and/or remove instances
     this.__updateInstances(items, limit, isntIdxToItemsIdx);
-    // If we're chunking, schedule a rAF task to measure/continue chunking
+    // If we're chunking, schedule a rAF task to measure/continue chunking.     
+    // Do this before any notifying events (renderedItemCount & dom-change)
+    // since those could modify items and enqueue a new full render which will
+    // pre-empt this measurement.
     if (this.initialCount &&
        (this.__shouldMeasureChunk || this.__shouldContinueChunking)) {
       this.__debounceRender(this.__continueChunkingAfterRaf);