优化

components/select/demo/size.md

@@ -48,6 +48,7 @@ The height of the input field for the select defaults to 32px. If size is set to
       :defaultValue="['a1', 'b2']"
       style="width: 200px"
       @change="handleChange"
+      @popupScroll="popupScroll"
     >
       <a-select-option v-for="i in 25" :key="(i + 9).toString(36) + i">
         {{(i + 9).toString(36) + i}}
@@ -78,6 +79,9 @@ export default {
   methods: {
     handleChange(value) {
       console.log(`Selected: ${value}`);
+    },
+    popupScroll(){
+      console.log('popupScroll')
     }
   }
 }

components/select/style/index.less

@@ -453,7 +453,7 @@
     padding-left: 0; // Override default ul/ol
     list-style: none;
     max-height: 250px;
-    // overflow: auto;
+    overflow: auto;
 
     &-item-group-list {
       margin: 0;

components/vc-menu/MenuMixin.js

@@ -197,7 +197,9 @@ export default {
           // visible: props.visible,
         },
         class: className,
-        on: {},
+        on: {
+          ...this.$listeners,
+        },
       }
       if (props.id) {
         domProps.id = props.id

components/vc-select/DropdownMenu.vue

@@ -38,7 +38,7 @@ export default {
   watch: {
     visible (val) {
       if (!val) {
-        this.lastVisible = false
+        this.lastVisible = val
       }
     },
   },
@@ -51,6 +51,7 @@ export default {
     }
     this.lastVisible = props.visible
     this.lastInputValue = props.inputValue
+    this.prevVisible = this.visible
   },
   methods: {
     scrollActiveItemToView () {
@@ -89,7 +90,7 @@ export default {
         firstActiveValue,
         dropdownMenuStyle,
       } = props
-      const { menuDeselect, menuSelect } = this.$listeners
+      const { menuDeselect, menuSelect, popupScroll } = this.$listeners
       if (menuItems && menuItems.length) {
         const selectedKeys = getSelectKeys(menuItems, value)
         const menuProps = {
@@ -103,6 +104,9 @@ export default {
           style: dropdownMenuStyle,
           ref: 'menuRef',
         }
+        if (popupScroll) {
+          menuProps.on.scroll = popupScroll
+        }
         if (multiple) {
           menuProps.on.deselect = menuDeselect
           menuProps.on.select = menuSelect
@@ -160,7 +164,6 @@ export default {
   },
   render () {
     const renderMenu = this.renderMenu()
-    this.prevVisible = this.visible
     const { popupFocus, popupScroll } = this.$listeners
     return renderMenu ? (
       <div