[improvement] Tabbar: jsx (#2663)

packages/utils/index.js

@@ -1,5 +1,6 @@
 import Vue from 'vue';
 import use from './use';
+import { useSlots } from './slots';
 
 const isServer = Vue.prototype.$isServer;
 
@@ -44,6 +45,7 @@ export {
   isObj,
   isDef,
   isServer,
+  useSlots,
   camelize,
   isAndroid
 };

packages/utils/slots.js

@@ -0,0 +1,8 @@
+export function useSlots({ $slots, $scopedSlots }) {
+  return (name, props) => {
+    if ($scopedSlots[name]) {
+      return $scopedSlots[name](props);
+    }
+    return $slots[name];
+  };
+}