[bugfix] Tab: incorrect height when use animated prop

packages/tabs/index.js

@@ -442,7 +442,7 @@ export default sfc({
             {this.slots('nav-right')}
           </div>
         </div>
-        <div ref="content" class={bem('content', { animated })}>
+        <div ref="content" class={bem('content')}>
           {animated ? (
             <div class={bem('track')} style={this.trackStyle}>
               {this.slots()}

packages/tabs/index.less

@@ -117,12 +117,6 @@
     border-radius: 3px;
   }
 
-  &__content {
-    &--animated {
-      overflow: hidden;
-    }
-  }
-
   &__track {
     position: relative;
     display: flex;
@@ -146,10 +140,18 @@
       height: @tabs-card-height;
     }
   }
+}
 
-  .van-tab__pane {
+.van-tab__pane {
+  &,
+  &-wrapper {
     flex-shrink: 0;
     box-sizing: border-box;
     width: 100%;
   }
+
+  &-wrapper--inactive {
+    height: 0;
+    overflow: visible;
+  }
 }