From ed511e92195d9d3638aab3130f2684de3af27e33 Mon Sep 17 00:00:00 2001
From: Leopoldthecoder <Leopoldthecuber@gmail.com>
Date: Mon, 13 Nov 2017 17:12:25 +0800
Subject: [PATCH] Tree & Breadcrumb: fix setAttribute to undefined bug

---
 packages/breadcrumb/src/breadcrumb.vue | 4 +++-
 packages/tree/src/tree.vue             | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/breadcrumb/src/breadcrumb.vue b/packages/breadcrumb/src/breadcrumb.vue
index dc7a096ca..c5d0f021c 100644
--- a/packages/breadcrumb/src/breadcrumb.vue
+++ b/packages/breadcrumb/src/breadcrumb.vue
@@ -26,7 +26,9 @@
 
     mounted() {
       const items = this.$el.querySelectorAll('.el-breadcrumb__item');
-      items[items.length - 1].setAttribute('aria-current', 'page');
+      if (items.length) {
+        items[items.length - 1].setAttribute('aria-current', 'page');
+      }
     }
   };
 </script>
diff --git a/packages/tree/src/tree.vue b/packages/tree/src/tree.vue
index 43ad448c9..1a427c0c6 100644
--- a/packages/tree/src/tree.vue
+++ b/packages/tree/src/tree.vue
@@ -194,7 +194,7 @@
           checkedItem[0].setAttribute('tabindex', 0);
           return;
         }
-        this.treeItems[0].setAttribute('tabindex', 0);
+        this.treeItems[0] && this.treeItems[0].setAttribute('tabindex', 0);
       },
       handelKeydown(ev) {
         const currentItem = ev.target;