From 6cd01c2647be1417e03cdef58e76c22b9caa6eb3 Mon Sep 17 00:00:00 2001
From: kingwl <805037171@163.com>
Date: Thu, 24 Nov 2016 14:48:56 +0800
Subject: [PATCH] InputNumber: fix invalid value (#1330)

---
 packages/input-number/src/input-number.vue | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/packages/input-number/src/input-number.vue b/packages/input-number/src/input-number.vue
index 3487f7683..f014a0584 100644
--- a/packages/input-number/src/input-number.vue
+++ b/packages/input-number/src/input-number.vue
@@ -175,15 +175,17 @@
         return (arg1 + arg2) / m;
       },
       increase() {
-        if (this.value + this.step > this.max || this.disabled) return;
-        this.currentValue = this.accAdd(this.step, this.value);
+        const value = this.value || 0;
+        if (value + this.step > this.max || this.disabled) return;
+        this.currentValue = this.accAdd(this.step, value);
         if (this.maxDisabled) {
           this.inputActive = false;
         }
       },
       decrease() {
-        if (this.value - this.step < this.min || this.disabled) return;
-        this.currentValue = this.accSub(this.value, this.step);
+        const value = this.value || 0;
+        if (value - this.step < this.min || this.disabled) return;
+        this.currentValue = this.accSub(value, this.step);
         if (this.minDisabled) {
           this.inputActive = false;
         }