html
<!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>Vue.js App</title>
</head>
<body>
<div id="app">
姓：<input type="text" v-model="firstName"><br>
名：<input type="text" v-model="lastName"><br>
<p>姓名:{{ fullName }}</p>
<button @click="changeName">修改姓名</button>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script> <!--2：引包 开发版本包 -->
<script>
new Vue({
el: '#app',
data: {
firstName: '刘',
lastName: '备',
},
methods: {
changeName() {
this.fullName = '吕小布'
}
},
computed: {
fullName: {
get() {
return this.firstName + this.lastName
},
set(newValue) {
this.firstName = newValue.slice(0, 1)
this.lastName = newValue.slice(1)
}
}
}
})
</script>
</body>
</html>