mint-ui的search组件如何在键盘显示搜索按钮

<form action="" target="frameFile">
  <mt-search v-model="value" placeholder="请输入关键字" @keyup.native.enter="search(value)">
    <div v-infinite-scroll="loadMore()" infinite-scroll-disabled="loading" infinite-scroll-distance="10">
      <ListItem :lists="lists"></ListItem>
      <div class="loading-text" v-if="(loadingTextBtn==true)"><span v-text="loadingText"></span><mt-spinner v-if="(loadingComplete==false)" type="snake" :size="10"></mt-spinner></div>
    </div>
  </mt-search>
  <iframe name='frameFile' style="display: none;"></iframe>
</form>

<form action="" v-on:submit.prevent=""

 onsubmit="return false;"

document.activeElement.blur();