Merge branch 'v1'

Author: Akryum

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

@@ -362,7 +362,7 @@ export default {
 
     updateVisibleItems (checkItem, checkPositionDiff = false) {
       const itemSize = this.itemSize
-      const gridItems = this.gridItems
+      const gridItems = this.gridItems || 1
       const itemSecondarySize = this.itemSecondarySize || itemSize
       const minItemSize = this.$_computedMinItemSize
       const typeField = this.typeField