Vue —— 设置计算属性

  • set and get
设置计算属性，同步更新元数据的值
<!DOCTYPE html>
<html>
<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>set_caculate_property.html</title>
    <script src="../js/vue.js"></script>
</head>

<body>
    <div id="example">
        <p>衬衫的价格是：{{price}}元, 打完折后是:{{discount}}元</p>
        <button @click="btnclick(100)">恢复平价</button><button @click="btnclick_add(50)">加价</button>
    </div>
</body>
<script>
    //匿名对象
    new Vue({
        el: "#example",
        //属性数据
        data: {
            price: 300
        },
        //触发事件
        methods: {
            btnclick: function(new_price) {
                this.price = new_price;
            },
            btnclick_add: function(new_price) {
                this.price += new_price;
            }
        },
        computed: {
            //这里没有写函数，直接写了两个类 get 和 set 顾名思义
            discount: {
                get: function() {
                    return this.price * 0.8;
                },
                set: function(new_price) {
                    this.price = new_price;
                }
            }
        }
    });
</script>
</html>

 

posted @ 2020-10-24 09:12  a最简单  阅读(1136)  评论(0)    收藏  举报