From 3cef9ccc7254bfdf30d9ebece1c4cdbe81606fcb Mon Sep 17 00:00:00 2001
From: ericjyang <jjy_yang@163.com>
Date: Tue, 24 May 2022 09:40:34 +0800
Subject: [PATCH] fix(backtop): add toTop event

---
 src/back-top/_example/back-top.ts   | 4 ++++
 src/back-top/_example/back-top.wxml | 3 ++-
 src/back-top/back-top.ts            | 1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/back-top/_example/back-top.ts b/src/back-top/_example/back-top.ts
index 1b9c47e1a..53e08be00 100644
--- a/src/back-top/_example/back-top.ts
+++ b/src/back-top/_example/back-top.ts
@@ -46,4 +46,8 @@ Page({
     this.setData({ backTopDemo: backTopDemos[index] });
     wx.pageScrollTo({ duration: 300, scrollTop: 1000 });
   },
+
+  onToTop(e: any) {
+    console.log('backToTop', e);
+  },
 });
diff --git a/src/back-top/_example/back-top.wxml b/src/back-top/_example/back-top.wxml
index 04ac6e01c..1aee3983b 100644
--- a/src/back-top/_example/back-top.wxml
+++ b/src/back-top/_example/back-top.wxml
@@ -52,6 +52,7 @@
       <t-skeleton rowCol="{{rowCol3}}" class="skeleton-item" t-class-text="skeleton-text" loading></t-skeleton>
     </view>
 
-    <t-back-top wx:if="{{showBackTop}}" theme="{{backTopDemo.theme}}" text="{{backTopDemo.text}}"> </t-back-top>
+    <t-back-top wx:if="{{showBackTop}}" theme="{{backTopDemo.theme}}" text="{{backTopDemo.text}}" bindtoTop="onToTop">
+    </t-back-top>
   </t-demo>
 </view>
diff --git a/src/back-top/back-top.ts b/src/back-top/back-top.ts
index b535cf81d..b962418cc 100644
--- a/src/back-top/back-top.ts
+++ b/src/back-top/back-top.ts
@@ -26,6 +26,7 @@ export default class BackTop extends SuperComponent {
    * Component methods
    */
   toTop() {
+    this.triggerEvent('toTop');
     wx.pageScrollTo({
       scrollTop: 0,
       duration: 300,