vue3输入单号和张数如何自动生成连号的单号

<div><el-button type="primary" size="default" @click="handleDialog">输入连号</el-button></div>
	<br/><br/>
	<el-table
	  :data="tableData"
	  style="width: 80vw; margin-bottom: 20px"
	  border
	>
		<el-table-column prop="code" label="快递代码" width="200"></el-table-column>
		<el-table-column prop="no" label="快递单号"></el-table-column>
		<el-table-column prop="name" label="名称"></el-table-column>
		<!-- <el-table-column prop="optes" label="操作"></el-table-column> -->
	</el-table>

<el-dialog v-model="showDialog">
		<el-table
		  :data="tableDataDialog"
		  style="width: 80vw; margin-bottom: 20px"
		  border
		>
			<el-table-column prop="code" label="快递代码" width="200">
				<template #default="{row}">
					<el-input v-model="row.code" maxlength="10">
					</el-input>
				</template>
			</el-table-column>
			<el-table-column prop="no" label="快递单号">
				<template #default="{row}">
					<el-input v-model="row.no" maxlength="8">
					</el-input>
				</template>
			</el-table-column>
			<el-table-column prop="name" label="名称">
				<template #default="{row}">
					<el-input v-model="row.name">
					</el-input>
				</template>
			</el-table-column>
			<el-table-column prop="num" label="张数">
				<template #default="{row}">
					<el-input v-model="row.num" minlength="1">
					</el-input>
				</template>
			</el-table-column>
		</el-table>
		<el-button type="info" size="default" @click="save">确定</el-button>
	</el-dialog>

const tableData = reactive([])//生成之后的table表格
const tableDataDialog = ref([])//弹出层的表格
const showDialog = ref(false)//控制弹出层显隐

const handleDialog = ()=>{
	showDialog.value = true
	let obj = {
		code: '',
		no: '',
		name: '',
		num: ''
	}
	tableDataDialog.value.push(obj)
}

const save = ()=>{
		let length = tableDataDialog.value.length
		let size = new Set(tableDataDialog.value.map(item=>item.code)).size
		if(size !== length){
			ElMessage('物流号码不能重复')
			return
		}
		let obj = {}
		let len = tableDataDialog.value[0].code.toString().length
	tableData.value = []
	tableDataDialog.value.forEach((item)=>{
		for(var i=0;i<item.num;i++){
			obj = {
				code: item.code,
				no: item.no,
				name: item.name
			}
			item.no++
			item.no = item.no.toString()
			for(var j=0;j<len;j++){
				let noLen = item.no.toString().length
				if(noLen < len){
					item.no = '0' + item.no//如果输入的为带00xx前缀的号码，自动生成要做补0操作，不然会把0自动去掉
					noLen++
				}
			}
			tableData.push(obj)
			showDialog.value = false
		}
	})
}