<!DOCTYPE html>
<html lang="zh">
<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">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<title>自学vue:计算属性的基本使用</title>
</head>
<body>
<div id="app">
<span>{{one}} {{tow}} {{three}}</span>
<br>
<span>{{one + ‘ ‘ + tow + ‘ ‘ + three}}</span>
<br>
<span>{{all}}</span>
</div>
</body>
<script type="text/javascript">
let app = new Vue({
el:’#app’,
data:{
one:’测试’,
tow:’一下’,
three:’数据’
},
//computed用于属性计算，并非方法类的，名称上以静态名词为属性名
//属性计算写法与methods写法一致，为 const:function(){}
//属性计算可以简化可以的数据赋值，减少重叠
computed:{
all:function(){
return this.one + ‘ ‘ + this.tow + ‘ ‘ + this.three;
}
}
})
</script>
</html>
