vue.html
<!DOCTYPE html>
<html lang="en">
<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>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>
<body>
<!-- watch 侦听器 -->
<!-- computed 计算属性 -->
<!-- data > methods > computed -->
<div id="app">
<!-- 姓名：{{ name }} 年龄：{{ age }} -->
<!-- {{ desc() }} -->
<!-- {{ looks }} -->
<!-- {{ desc }}
{{ looks }} -->
{{ desc }}
{{ looks }}
</div>
<script>
const vm = new Vue({
el: '#app',
data: {
name: '杉杉',
age: 18,
looks: 'very beautiful',
// desc: '姓名：杉杉 年龄：18'
},
methods: {
desc() {
console.log('----methods----');
return `姓名：${this.name} 年龄：${this.age}`;
}
},
watch: {
// name () {
// this.desc = `姓名：${this.name} 年龄：${this.age}`;
// },
// age () {
// this.desc = `姓名：${this.name} 年龄：${this.age}`;
// }
},
computed: {
desc() {
console.log('---computed---');
return `姓名：${this.name} 年龄：${this.age}`;
}
}
})
</script>
</body>
</html>
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