From 771bd7eba25742b59f1fbbc8e82028bf4e247e73 Mon Sep 17 00:00:00 2001
From: ZWkang <907747874@qq.com>
Date: Wed, 27 Sep 2017 16:54:44 +0800
Subject: [PATCH 1/3] fix button actived had 1px blank

---
 packages/vant-css/src/button.css | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/packages/vant-css/src/button.css b/packages/vant-css/src/button.css
index 7a3356dd1..8416fa779 100644
--- a/packages/vant-css/src/button.css
+++ b/packages/vant-css/src/button.css
@@ -15,10 +15,10 @@
   &::before {
     content: " ";
     position: absolute;
-    top: 0;
-    left: 0;
-    right: 0;
-    bottom: 0;
+    top: -1px;
+    left: -1px;
+    right: -1px;
+    bottom: -1px;
     opacity: 0;
     background-color: $black;
     border-radius: inherit; /* inherit parent's border radius */

From 9d7417b386e4e8135c0e7f3e39b9e33c0a880b68 Mon Sep 17 00:00:00 2001
From: kang <907747874@qq.com>
Date: Wed, 27 Sep 2017 18:11:16 +0800
Subject: [PATCH 2/3] fix button actived 1px blank

---
 packages/vant-css/src/button.css | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/packages/vant-css/src/button.css b/packages/vant-css/src/button.css
index 8416fa779..1fd62f0e8 100644
--- a/packages/vant-css/src/button.css
+++ b/packages/vant-css/src/button.css
@@ -15,13 +15,16 @@
   &::before {
     content: " ";
     position: absolute;
-    top: -1px;
-    left: -1px;
-    right: -1px;
-    bottom: -1px;
+    top: 50%;
+    left: 50%;
     opacity: 0;
-    background-color: $black;
-    border-radius: inherit; /* inherit parent's border radius */
+    width: 100%;
+    height: 100%;
+    border: inherit;
+    border-color: #000;
+    background-color: #000;
+    border-radius: inherit;/* inherit parent's border radius */
+    transform: translate3d(-50%, -50%, 0); 
   }
 
   &:not([disabled]):active::before {

From c3b24aa0244a869a535235e0b86c23ccde1b8450 Mon Sep 17 00:00:00 2001
From: kang <907747874@qq.com>
Date: Wed, 27 Sep 2017 18:12:38 +0800
Subject: [PATCH 3/3] Update button.css

---
 packages/vant-css/src/button.css | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/vant-css/src/button.css b/packages/vant-css/src/button.css
index 1fd62f0e8..7dbd1050f 100644
--- a/packages/vant-css/src/button.css
+++ b/packages/vant-css/src/button.css
@@ -21,8 +21,8 @@
     width: 100%;
     height: 100%;
     border: inherit;
-    border-color: #000;
-    background-color: #000;
+    border-color: $black;
+    background-color: $black;
     border-radius: inherit;/* inherit parent's border radius */
     transform: translate3d(-50%, -50%, 0); 
   }