https://developers.weixin.qq.com/miniprogram/dev/component/textarea.html

pc端微信打开小程序也是同样的，如上图输入信息，会把拼音也显示出来，手机端正常

<view class="box">
<textarea cursor-spacing="15px" v-model="textMsg" :show-confirm-bar="true"  :auto-height="true"  />
</view>
<view class="send"  :class="isVoice?'hidden':''" [@tap](/user/tap)="sendText">
<view :class="textMsg ? 'btn-active' : 'btn'">发送</view>
</view>