fix: prevent empty gaps on fast scrolling, fix (#863, #882) (#890)

Author: ferflores507

packages/vue-virtual-scroller/src/components/RecycleScroller.vue

@@ -741,8 +741,20 @@ export default {
       throw new Error('Rendered items limit reached')
     },
 
+    isAnyVisibleGap () {
+      // Check if any view index is not in sequence (detect gaps)
+      return this.pool
+        .filter(({ nr }) => nr.used)
+        .every(({ nr }, i) => i === 0 || nr.index !== this.pool[i - 1].index + 1)
+    },
+
     sortViews () {
       this.pool.sort((viewA, viewB) => viewA.nr.index - viewB.nr.index)
+
+      if (this.isAnyVisibleGap()) {
+        this.updateVisibleItems(false)
+        clearTimeout(this.$_sortTimer)
+      }
     },
   },
 }