lovecoding
/
W0407


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <!-- 
        数据代理:
        Object.defineProperty()中getter和setter
    -->
          <div id="app">
        <h1>{{msg}}</h1>
    </div>
    <script src="./vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            data:{
                msg:'12'
            }
        })
    </script>
    <script>
        let obj = {
            name:"图图",
            age: 3
        }
        let x = 31;
        // console.log(obj.name)
        Object.defineProperty(obj,'age',{
            get() {
                console.log("读取");
                return x;
            },
            set(value) {
                console.log("修改")
                x = value;
            }
        })
        obj.age = 12;
        console.log(obj.age)
        
    </script>
</body>
</html>