diff --git a/docs/src/index.js b/docs/src/index.js
index e5175c5e4..6c6b36dd6 100644
--- a/docs/src/index.js
+++ b/docs/src/index.js
@@ -29,9 +29,7 @@ router.beforeEach((route, redirect, next) => {
 });
 
 router.afterEach(() => {
-  if (!isMobile) {
-    window.scrollTo(0, 0);
-  }
+  window.scrollTo(0, 0);
   window.syncPath();
 });
 
diff --git a/packages/dialog/index.js b/packages/dialog/index.js
index 02df39c96..13f96c899 100644
--- a/packages/dialog/index.js
+++ b/packages/dialog/index.js
@@ -58,5 +58,5 @@ Dialog.close = () => {
 
 export default Dialog;
 export {
-  Dialog
+  DialogComponent as Dialog
 };
diff --git a/packages/pay-order/index.vue b/packages/pay-order/index.vue
index 18a71ffe2..f9e5b4af1 100644
--- a/packages/pay-order/index.vue
+++ b/packages/pay-order/index.vue
@@ -1,6 +1,8 @@
 <template>
   <div class="van-pay-order">
-    <div class="van-pay-order__tip" v-show="tip || hasTipSlot">{{ tip }}<slot name="tip" /></div>
+    <div class="van-pay-order__tip" v-show="tip || $slots.tip">
+      <slot name="tip">{{ tip }}</slot>
+    </div>
     <div class="van-pay-order__bar">
       <div class="van-pay-order__price">
         <template v-if="hasPrice">
@@ -49,9 +51,6 @@ export default {
     priceDecimal() {
       const decimal = this.price % 100;
       return (decimal < 10 ? '0' : '') + decimal;
-    },
-    hasTipSlot () {
-      return !!this.$slots['tip']
     }
   },
 
diff --git a/packages/vant-css/src/toast.css b/packages/vant-css/src/toast.css
index 4695fa79b..10501a1b0 100644
--- a/packages/vant-css/src/toast.css
+++ b/packages/vant-css/src/toast.css
@@ -14,7 +14,7 @@
   justify-content: center;
   flex-direction: column;
   transform: translate3d(-50%, -50%, 0);
-  background-color: rgb(39, 39, 39, .7);
+  background-color: rgba(39, 39, 39, .7);
 
   &-wrapper {
     transition: opacity .2s;