Uno se fija y el otro se emite.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src='./vue.js'></script>
</head>
<body>
<div id="app">
{
{fullName}}
</div>
<script>
var vm = new Vue({
el: "#app",
data: {
firstName: "Dell",
lastName: "Lee",
},
computed: {
fullName: {
get: function() {
return this.firstName + " " + this.lastName
},
set: function(value) {
var arr = value.split(" ");
this.firstName = arr[0];
this.lastName = arr[1];
console.log(value);
}
}
}
})
</script>
</body>
</html>