From cadcd91968eeea9f8b90196b5c6adf16b9323cf8 Mon Sep 17 00:00:00 2001
From: thomasyonug <563473579@qq.com>
Date: Thu, 2 Mar 2017 21:33:17 +0800
Subject: [PATCH 1/2] cascader:bug fix #3191. when menuIndex = 0 edge case

---
 packages/cascader/src/menu.vue | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/packages/cascader/src/menu.vue b/packages/cascader/src/menu.vue
index ec4e763e4..e00196a4c 100644
--- a/packages/cascader/src/menu.vue
+++ b/packages/cascader/src/menu.vue
@@ -74,7 +74,11 @@
         if (item.__IS__FLAT__OPTIONS) {
           this.activeValue = item.value;
         } else {
-          this.activeValue.splice(menuIndex, this.activeValue.length - 1, item.value);
+          if (menuIndex) {
+            this.activeValue.splice(menuIndex, this.activeValue.length - 1, item.value);
+          } else {
+            this.activeValue = [item.value];
+          }
         }
         this.$emit('pick', this.activeValue);
       },
@@ -168,4 +172,4 @@
       );
     }
   };
-</script>
\ No newline at end of file
+</script>

From cbf3a9e1f664577c9ef372b1e6309d97b32f4088 Mon Sep 17 00:00:00 2001
From: thomasyonug <563473579@qq.com>
Date: Sun, 5 Mar 2017 22:43:50 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E5=87=8F=E5=B0=91=E5=B5=8C=E5=A5=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/cascader/src/menu.vue | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/packages/cascader/src/menu.vue b/packages/cascader/src/menu.vue
index e00196a4c..8958bf0c6 100644
--- a/packages/cascader/src/menu.vue
+++ b/packages/cascader/src/menu.vue
@@ -73,12 +73,10 @@
       select(item, menuIndex) {
         if (item.__IS__FLAT__OPTIONS) {
           this.activeValue = item.value;
+        } else if (menuIndex) {
+          this.activeValue.splice(menuIndex, this.activeValue.length - 1, item.value);
         } else {
-          if (menuIndex) {
-            this.activeValue.splice(menuIndex, this.activeValue.length - 1, item.value);
-          } else {
-            this.activeValue = [item.value];
-          }
+          this.activeValue = [item.value];
         }
         this.$emit('pick', this.activeValue);
       },