fix: vc-select

Author: tangjinzhou

components/_util/props-util.js

@@ -139,7 +139,7 @@ const getComponent = (instance, prop = 'default', options = instance, execute =
     }
   } else if (isVNode(instance)) {
     const temp = instance.props && instance.props[prop];
-    if (temp !== undefined) {
+    if (temp !== undefined && temp !== null) {
       return typeof temp === 'function' && execute ? temp(options) : temp;
     } else if (instance.children && instance.children[prop]) {
       let com = instance.children[prop];
@@ -305,18 +305,29 @@ export function isFragment(c) {
 }
 
 export function isEmptyElement(c) {
-  return c.type === Comment || (c.type === Text && c.children.trim() === '');
+  return (
+    c.type === Comment ||
+    (c.type === Fragment && c.children.length === 0) ||
+    (c.type === Text && c.children.trim() === '')
+  );
 }
 
 export function isStringElement(c) {
   return !c.tag;
 }
 
 export function filterEmpty(children = []) {
-  if (isFragment(children)) {
-    return children[0].children.filter(c => !isEmptyElement(c));
-  }
-  return children.filter(c => !isEmptyElement(c));
+  const res = [];
+  children.forEach(child => {
+    if (Array.isArray(child)) {
+      res.push(...child);
+    } else if (child.type === Fragment) {
+      res.push(...child.children);
+    } else {
+      res.push(child);
+    }
+  });
+  return res.filter(c => !isEmptyElement(c));
 }
 const initDefaultProps = (propTypes, defaultProps) => {
   Object.keys(defaultProps).forEach(k => {

examples/App.vue

@@ -4,7 +4,7 @@
   </div>
 </template>
 <script>
-import demo from '../antdv-demo/docs/input-number/demo/index';
+import demo from '../antdv-demo/docs/select/demo/tags';
 
 export default {
   components: {

examples/index.js

@@ -2,6 +2,9 @@ import '@babel/polyfill';
 import { createApp } from 'vue';
 import App from './App.vue';
 import {
+  Radio,
+  Spin,
+  Select,
   Input,
   InputNumber,
   Rate,
@@ -32,6 +35,8 @@ app
   .component('api', { ...basic })
   .component('CN', { ...basic })
   .component('US', { ...basic })
+  .use(Select)
+  .use(Spin)
   .use(Upload)
   .use(Button)
   .use(Icon)
@@ -42,5 +47,6 @@ app
   .use(Tooltip)
   .use(Col)
   .use(Row)
+  .use(Radio)
   .use(InputNumber)
   .mount('#app');