diff --git a/packages/button/index.less b/packages/button/index.less
index b240173e..dc0e6015 100644
--- a/packages/button/index.less
+++ b/packages/button/index.less
@@ -2,35 +2,35 @@
 
 .van-button {
   position: relative;
-  padding: 0;
   display: inline-block;
   height: 44px;
+  padding: 0;
+  font-size: 16px;
   line-height: 42px;
+  text-align: center;
+  -webkit-text-size-adjust: 100%;
+  vertical-align: middle;
   border-radius: 2px;
   box-sizing: border-box;
-  font-size: 16px;
-  text-align: center;
-  vertical-align: middle;
   -webkit-appearance: none;
-  -webkit-text-size-adjust: 100%;
 
   &::after {
-    content: " ";
     position: absolute;
     top: 50%;
     left: 50%;
-    opacity: 0;
     width: 100%;
     height: 100%;
+    background-color: @black;
     border: inherit;
     border-color: @black;
-    background-color: @black;
     border-radius: inherit; /* inherit parent's border radius */
+    content: ' ';
+    opacity: 0;
     transform: translate(-50%, -50%);
   }
 
-  &:active::after {
-    opacity: .15;
+  &--active::after {
+    opacity: 0.15;
   }
 
   &--unclickable::after {
@@ -90,8 +90,8 @@
 
   &--small {
     height: 30px;
-    padding: 0 8px;
     min-width: 60px;
+    padding: 0 8px;
     font-size: 12px;
     line-height: 28px;
   }
@@ -101,8 +101,8 @@
     display: inline-block;
     width: 50px;
     height: 22px;
-    line-height: 20px;
     font-size: 10px;
+    line-height: 20px;
 
     & + .van-button--mini {
       margin-left: 5px;
@@ -110,8 +110,8 @@
   }
 
   &--block {
-    width: 100%;
     display: block;
+    width: 100%;
   }
 
   &--round {
@@ -123,6 +123,6 @@
   }
 
   &--disabled {
-    opacity: .5;
+    opacity: 0.5;
   }
 }
diff --git a/packages/button/index.ts b/packages/button/index.ts
index 94b03143..6ecc9ae4 100644
--- a/packages/button/index.ts
+++ b/packages/button/index.ts
@@ -3,10 +3,10 @@ import { button } from '../mixins/button';
 import { openType } from '../mixins/open-type';
 
 VantComponent({
-  classes: ['loading-class'],
-
   mixins: [button, openType],
 
+  classes: ['hover-class', 'loading-class'],
+
   props: {
     plain: Boolean,
     block: Boolean,
diff --git a/packages/button/index.wxml b/packages/button/index.wxml
index 68f22736..3c18b206 100644
--- a/packages/button/index.wxml
+++ b/packages/button/index.wxml
@@ -2,21 +2,26 @@
 
 <button
   id="{{ id }}"
-  lang="{{ lang }}"
   class="custom-class {{ utils.bem('button', [type, size, { block, round, plain, square, loading, disabled, unclickable: disabled || loading }]) }}"
+
   open-type="{{ openType }}"
+  hover-class="van-button--active hover-class"
+  lang="{{ lang }}"
   session-from="{{ sessionFrom }}"
-  app-parameter="{{ appParameter }}"
-  send-message-img="{{ sendMessageImg }}"
-  send-message-path="{{ sendMessagePath }}"
-  show-message-card="{{ showMessageCard }}"
   send-message-title="{{ sendMessageTitle }}"
-  bind:tap="onClick"
-  binderror="bindError"
-  bindcontact="bindContact"
-  bindopensetting="bindOpenSetting"
+  send-message-path="{{ sendMessagePath }}"
+  send-message-img="{{ sendMessageImg }}"
+  show-message-card="{{ showMessageCard }}"
+  app-parameter="{{ appParameter }}"
+  aria-label="{{ ariaLabel }}"
+
+  bindtap="onClick"
   bindgetuserinfo="bindGetUserInfo"
+  bindcontact="bindContact"
   bindgetphonenumber="bindGetPhoneNumber"
+  binderror="bindError"
+  bindlaunchapp="bindLaunchApp"
+  bindopensetting="bindOpenSetting"
 >
   <van-loading
     wx:if="{{ loading }}"
diff --git a/packages/mixins/button.ts b/packages/mixins/button.ts
index f6b5e9c6..f783f94a 100644
--- a/packages/mixins/button.ts
+++ b/packages/mixins/button.ts
@@ -1,15 +1,18 @@
 export const button = Behavior({
+  externalClasses: ['hover-class'],
+
   properties: {
     id: String,
-    sessionFrom: String,
-    appParameter: String,
-    sendMessageImg: String,
-    sendMessagePath: String,
-    showMessageCard: String,
-    sendMessageTitle: String,
     lang: {
       type: String,
       value: 'en'
     },
+    sessionFrom: String,
+    sendMessageTitle: String,
+    sendMessagePath: String,
+    sendMessageImg: String,
+    showMessageCard: String,
+    appParameter: String,
+    ariaLabel: String
   }
 });
diff --git a/packages/mixins/open-type.ts b/packages/mixins/open-type.ts
index f0460aff..bdbc8c0b 100644
--- a/packages/mixins/open-type.ts
+++ b/packages/mixins/open-type.ts
@@ -16,12 +16,16 @@ export const openType = Behavior({
       this.$emit('getphonenumber', event.detail);
     },
 
+    bindError(event: Partial<Weapp.Event>) {
+      this.$emit('error', event.detail);
+    },
+
+    bindLaunchApp(event: Partial<Weapp.Event>) {
+      this.$emit('launchapp', event.detail);
+    },
+
     bindOpenSetting(event: Partial<Weapp.Event>) {
       this.$emit('opensetting', event.detail);
     },
-
-    bindError(event: Partial<Weapp.Event>) {
-      this.$emit('error', event.detail);
-    }
   }
 });