看不懂了昂，记录一下，慢慢理解吧
<!DOCTYPE html>
<html>
<head> <meta charset="utf-8">
<title>Vue 示例</title>
</head>
<body>
<div id="app" >
姓名：{{ fullName }}
</div>
<script src="https://unpkg.com/vue/dist/vue.min.js"></script>
<script>
var padDate = function(value){
return value < 10 ? '0' + value :value;
}
var app = new Vue({
el: '#app',
data: {
fistName: 'Jack',
lastName: 'Green'
},
computed: {
fullName: {
// Getter, 用于读取
get: function () {
return this.fistName + ',' + this.lastName;
},
// Setter,写入时触发
set: function (newValue) {
var names = newValue.split(',');
this.fistName = names[0];
this.lastName = names[names.length - 1];
}
}
}
})
</script>
</body>
</html>