From f60b608979352ef678845cae5313e021091372eb Mon Sep 17 00:00:00 2001
From: iota <980751937@qq.com>
Date: Sat, 12 Jan 2019 17:16:41 +0800
Subject: [PATCH] optimized code

There's unnecessary else after return.
```js
if (containerElement && containerElement !== document && containerElement !== document.body) {
    return Math.max(
      containerElement.scrollHeight,
      containerElement.offsetHeight,
      containerElement.clientHeight
    );
  } else {
    let body = document.body;
    let html = document.documentElement;

    return Math.max(
      body.scrollHeight,
      body.offsetHeight,
      htmlEl.clientHeight,
      htmlEl.scrollHeight,
      htmlEl.offsetHeight
    );
  }
```
---
 modules/mixins/animate-scroll.js | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/modules/mixins/animate-scroll.js b/modules/mixins/animate-scroll.js
index e93555c5..552f4e4d 100644
--- a/modules/mixins/animate-scroll.js
+++ b/modules/mixins/animate-scroll.js
@@ -61,24 +61,24 @@ const currentPositionY = (options) => {
 
 const scrollContainerHeight = (options) => {
   const containerElement = options.data.containerElement;
+  const body = document.body;
+  const htmlEl = document.documentElement;
+  
   if (containerElement && containerElement !== document && containerElement !== document.body) {
     return Math.max(
       containerElement.scrollHeight,
       containerElement.offsetHeight,
       containerElement.clientHeight
     );
-  } else {
-    let body = document.body;
-    let html = document.documentElement;
-
-    return Math.max(
-      body.scrollHeight,
-      body.offsetHeight,
-      html.clientHeight,
-      html.scrollHeight,
-      html.offsetHeight
-    );
   }
+
+  return Math.max(
+    body.scrollHeight,
+    body.offsetHeight,
+    htmlEl.clientHeight,
+    htmlEl.scrollHeight,
+    htmlEl.offsetHeight
+  );
 };
 
 const animateScroll = (easing, options, timestamp) => {
@@ -210,4 +210,4 @@ export default {
   scrollToBottom,
   scrollTo,
   scrollMore,
-};
\ No newline at end of file
+};