werun-wxapp/components/search/search.wxml

<view class="search_box">
    <view class="search">
        <van-icon  name="{{iconUrl}}" />
        <input class="search_input" bindinput="toSearch" type="text" model:value="{{title}}" placeholder="{{placeholder}}"/>
    </view>
    <button style="background-color:{{btnBgColor}}" class="search_btn" type="primary" bind:tap="toSearch">{{btnText}}</button>
</view>