先贴代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>货单详情</title>
</head>
<body>
<div id="app">
<div id="main">
{{waybill.qwert}}</div>
</div>
</body>
<script src="~/js/vue@2.6.12/dist/vue.js"></script>
<script src="~/js/axios@0.21.1/dist/axios.js"></script>
<script>
var app = new Vue({
el: '#app',
data: function () {
return {
waybill: {
},
}
},
methods: {
doQuery:function () {
axios.post("@Url.Content("~/Waybill/GetWaybillInfo")", { waybill_id: 26 })
.then(response => {
this.waybill = response.data.waybill;
this.waybill.qwert = "aa1";});
//this.waybill.qwert = "aa2";
},
},
mounted() {
this.doQuery();
}
})
</script>
</html>
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为什么经过了ajax请求this.waybill.qwert可以在页面显示，qwert不是waybill的属性（ajax返回的数据百分百不包含该属性），在ajax之后加上去的，理论上是不显示的，为什么这里可以显示出来？？？
注释掉那个ajax请求，直接this.waybill.qwert = "aa2"则按预期不显示。