代码
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<!DOCTYPE html>
<html lang="en" style="background-color: #ccc;">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
<div>商品名称:<input v-model="product.name"/></div>
<div>商品数量:<input v-model="product.count"/></div>
<div>商品标题:<input v-model="product.title"/></div>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script>
var vm = new Vue({
el: '#app',
data: {
product: {
name: '',
count: '',
title: ''
}
},
watch: {
'product.name': function(newValue){
console.log(newValue)
},
'product.count': function(newValue){
console.log(newValue)
},
'product.title': function(newValue){
console.log(newValue)
}
}
})
</script>
</html>
运行结果