[Improvement] Tab: scroll to corrent position when sticky & tab change (#389)

docs/markdown/zh-CN/changelog.md

@@ -11,16 +11,16 @@
 **Bug Fixes**
 - 修复 Popup overlayClass 类型错误 [\#374](https://github.com/youzan/vant/pull/374) [@chenjiahan](https://github.com/chenjiahan)
 - 修复 Filed number 类型输入值过滤 [\#386](https://github.com/youzan/vant/pull/386) [@chenjiahan](https://github.com/chenjiahan)
-- 修复 Icon 'new' 显示问题 [\#381](https://github.com/youzan/vant/pull/381) ([@pangxie1991](https://github.com/pangxie1991))
+- 修复 Icon 'new' 显示问题 [\#381](https://github.com/youzan/vant/pull/381) [@pangxie1991](https://github.com/pangxie1991)
 - 修复 Sku 按钮圆角问题 [\#378](https://github.com/youzan/vant/pull/378) [@chenjiahan](https://github.com/chenjiahan)
 - 修复 Radio & Checkbox 禁用态样式 [\#383](https://github.com/youzan/vant/pull/383) [@chenjiahan](https://github.com/chenjiahan)
-
+- 修复 Filed disabled 在安卓下的显示问题 [\#388](https://github.com/youzan/vant/pull/388) [@chenjiahan](https://github.com/chenjiahan)
 
 ### [0.11.5](https://github.com/youzan/vant/tree/v0.11.5)
 `2017-12-04`
 
 **Improvements**
-- Coupon：调增 Cell 右侧文案 [\#371](https://github.com/youzan/vant/pull/371) [@chenjiahan](https://github.com/chenjiahan)
+- Coupon：调整 Cell 右侧文案 [\#371](https://github.com/youzan/vant/pull/371) [@chenjiahan](https://github.com/chenjiahan)
 - GoodsAction: 支持国际化 [\#367](https://github.com/youzan/vant/pull/367) [@chenjiahan](https://github.com/chenjiahan)
 - 增加 Props 命名规范相关文档 [\#366](https://github.com/youzan/vant/pull/366) [@chenjiahan](https://github.com/chenjiahan)
 

packages/tabs/index.vue

@@ -79,6 +79,11 @@ export default {
     curActive() {
       this.scrollIntoView();
       this.setNavBar();
+
+      // scroll to correct position
+      if (this.position === 'page-top' || this.position === 'content-bottom') {
+        scrollUtils.setScrollTop(this.scrollEl, scrollUtils.getElementTop(this.$el));
+      }
     },
 
     sticky(isSticky) {
@@ -90,9 +95,12 @@ export default {
     this.correctActive(this.active);
     this.setNavBar();
 
-    if (this.sticky) {
-      this.scrollHandler(true);
-    }
+    this.$nextTick(() => {
+      if (this.sticky) {
+        this.scrollHandler(true);
+      }
+      this.scrollIntoView();
+    });
   },
 
   beforeDestroy() {

packages/vant-css/src/tab.css

@@ -73,11 +73,12 @@ $van-tabs-card-height: 28px;
 
     .van-tabs__nav {
       overflow-x: auto;
+      overflow-y: hidden;
       -webkit-overflow-scrolling: touch;
 
       &::-webkit-scrollbar {
         display: none;
-        background-color: transparent;
+        background: transparent;
       }
     }
   }