Fixed extra-props error

Author: tangbc

dist/index.js

@@ -1,5 +1,5 @@
 /*!
- * vue-virtual-scroll-list v2.1.0
+ * vue-virtual-scroll-list v2.1.1
  * open source under the MIT license
  * https://github.com/tangbc/vue-virtual-scroll-list#readme
  */
@@ -534,14 +534,15 @@
     mixins: [Wrapper],
     props: ItemProps,
     render: function render(h) {
-      var component = this.component,
-          _this$itemProps = this.itemProps,
-          itemProps = _this$itemProps === void 0 ? {} : _this$itemProps;
-      itemProps.source = this.source;
-      return h(this.tag, {
+      var tag = this.tag,
+          component = this.component,
+          _this$extraProps = this.extraProps,
+          extraProps = _this$extraProps === void 0 ? {} : _this$extraProps;
+      extraProps.source = this.source;
+      return h(tag, {
         role: 'item'
       }, [h(component, {
-        props: itemProps
+        props: extraProps
       })]);
     }
   }); // wrapping for slot
@@ -550,8 +551,9 @@
     mixins: [Wrapper],
     props: SlotProps,
     render: function render(h) {
-      var uniqueKey = this.uniqueKey;
-      return h(this.tag, {
+      var tag = this.tag,
+          uniqueKey = this.uniqueKey;
+      return h(tag, {
         attrs: {
           role: uniqueKey
         }

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-virtual-scroll-list",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "A vue component support big amount data list with high scroll performance.",
   "main": "dist/index.js",
   "files": [

package.json

@@ -55,13 +55,13 @@ export const Item = Vue.component('virtual-list-item', {
   props: ItemProps,
 
   render (h) {
-    const { component, itemProps = {} } = this
-    itemProps.source = this.source
+    const { tag, component, extraProps = {} } = this
+    extraProps.source = this.source
 
-    return h(this.tag, {
+    return h(tag, {
       role: 'item'
     }, [h(component, {
-      props: itemProps
+      props: extraProps
     })])
   }
 })
@@ -73,9 +73,9 @@ export const Slot = Vue.component('virtual-list-slot', {
   props: SlotProps,
 
   render (h) {
-    const { uniqueKey } = this
+    const { tag, uniqueKey } = this
 
-    return h(this.tag, {
+    return h(tag, {
       attrs: {
         role: uniqueKey
       }