From 5be307bc71d237812c8db4e811bc8f6143b1f1a7 Mon Sep 17 00:00:00 2001
From: tanjinzhou <415800467@qq.com>
Date: Wed, 24 Jul 2019 19:21:27 +0800
Subject: [PATCH] fix: array class error #1009

---
 components/_util/vnode.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/components/_util/vnode.js b/components/_util/vnode.js
index 4ca58202d..eb7a6824d 100644
--- a/components/_util/vnode.js
+++ b/components/_util/vnode.js
@@ -1,4 +1,6 @@
 import { filterEmpty, parseStyleText } from './props-util';
+import classNames from 'classnames';
+
 export function cloneVNode(vnode, deep) {
   const componentOptions = vnode.componentOptions;
   const data = vnode.data;
@@ -88,6 +90,12 @@ export function cloneElement(n, nodeProps = {}, deep) {
     data.class.split(' ').forEach(c => {
       cls[c.trim()] = true;
     });
+  } else if (Array.isArray(data.class)) {
+    classNames(data.class)
+      .split(' ')
+      .forEach(c => {
+        cls[c.trim()] = true;
+      });
   } else {
     cls = { ...data.class, ...cls };
   }