js获取input的值event
使⽤  event.target.value 来获取input 的值
HTML
<el-table-column prop="purchaseDemandProdetailReplace2DTO.purchaseNumber" label="换货数量"  min-width="100">
<template slot-scope="scope">
html获取input输入的数据<el-input v-model="w.purchaseNumber"
@blur="changeNun(w)"
@input="w.purchaseNumber = place(/[^0-9]/g, '');">  //只允许数组数字，输⼊其他的则为空
</el-input>
</template>
</el-table-column>
js
changeNun($event,num){
console.log(event.target.value,num.purchaseNumber)  //event接收的时候要写成$event , 不然拿不到input的值
if(event.target.value>num.purchaseNumber){
event.target.value = num.purchaseNumber
this.$('换货数量不能⼤于未交货订单数量！');
}else if(event.target.value == '' || event.target.value == null){
event.target.value = 0
}
}