[bugfix] NoticeBar text disappeared when page back (#280)

* [bugfix] CouponList always show empty info

* [bugfix] add click feedback of buttons in components

* [Doc] add custom theme document

* [new feature] Notice bar support more props

* [bugfix] PullRefresh test cases

* [bugfix] unused NoticeBar style

* [bugfix] Swipe width calc error

* [Doc] english document of all action components

* [Doc] change document site path to /zanui/vant

* [Doc] fix

* [bugfix] uploader style error

* [bugfix] tabs document demo

* [new feature] Cell support vue-router target route

* [bugfix] add cell test cases

* update yarn.lock

* [bugfix] Tabbar cann't display info when use icon slot

* [Doc] update document title

* [bugfix] Dialog should reset button text when showed

* [new feature] CouponList add showCloseButton prop

* [new feature] Swipe add 'initialSwipe' prop

* [bugfix] NoticeBar text disappeared when page back

docs/examples-docs/zh-CN/notice-bar.md

@@ -21,6 +21,7 @@ Vue.component(NoticeBar.name, NoticeBar);
 
 :::demo 基础用法
 ```html
+<van-notice-bar text="测试测试。"></van-notice-bar>
 <van-notice-bar
   text="足协杯战线连续第2年上演广州德比战，上赛季半决赛上恒大以两回合5-3的总比分淘汰富力。"
   left-icon="//img.yzcdn.cn/public_files/2017/8/10/6af5b7168eed548100d9041f07b7c616.png"