vant ui 双向输入框禁止手机键盘弹出

<van-field readOnly  @focus="noBomBox" :formatter="formatterNumber" type="number" @click="show =true" class="field" v-model="fillData"  placeholder="请输入" />

//禁止手机键盘的弹出
noBomBox(Event) {
    document.activeElement.blur();
},