SearchBar h5 在宽屏幕打开（如pc，pad）时，点击clear按钮不生效

**复现步骤**
官方示例https://taro-ui.jd.com//h5/index.html#/pages/form/search-bar/index
在pc web中打开 能够复现

**期望行为**
期望能够清空

**报错信息**
没有报错

**系统信息**
taro 3.2.8
taro-ui 2.3.4

Open the official H5 SearchBar example at https://taro-ui.jd.com//h5/index.html#/pages/form/search-bar/index and reproduce the issue on a wide-screen PC or tablet viewport. Trace the SearchBar clear-button behavior in the repository, then verify that clicking clear removes the input value in the listed Taro 3.2.8 and taro-ui 2.3.4 context.

Written by the indexing model from the issue text.