The element input box can only enter numbers

      <el-form :model="FindDailyCardItem.requestdata">
                <el-form-item label="会员卡号(手机号):">
                  <el-input v-model="FindDailyCardItem.requestdata.cardCode" @input="FindDailyCardItem.requestdata.cardCode=FindDailyCardItem.requestdata.cardCode.replace(/^\D*(\d*(?:\.\d{0,2})?).*$/g, '$1')" />
                </el-form-item>
	  </el-form>